Research Explorer

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Researcher

Pieter Geiregat

Awards & Distinctions

175 Results

2025

Critical Roles of Ultrafast Energy Funnelling and Ultrafast Singlet-Triplet Annihilation in Quasi-2D Perovskite Optical Gain Mechanisms

Isabella WagnerWouter T.M. Van GompelRobin ErkensBart RuttensJan D'HaenLaurence LutsenDirk VanderzandeChern ChuangSheng Hsiung ChangPaul A. Hume et al.

U Journal Article in Advanced Materials

Mesoporous acridinium-based covalent organic framework for long-lived charge-separated exciton mediated photocatalytic [4+2] annulation

Ipsita NathJeet ChakrabortyKuber Singh RawatYanwei JiRundong WangKorneel MolkensNathalie De GeyterRino MorentVeronique Van SpeybroeckPieter Geiregat et al.

A1 Journal Article in ADVANCED MATERIALS

On the determination of the carrier temperature in weakly confined semiconductor nanocrystals using time-resolved optical spectroscopy

Ivo TangheChao-Yang LinIsabella WagnerServet Ataberk CayanMargarita SamoliZeger HensJustin HodgkissKai ChenPieter Geiregat

A1 Journal Article in NANOSCALE

Quantifying and Understanding Stimulated Emission from Bulk PbS Nanocrystals with Vanishing Confinement

Jan MatthysAlexander ArutunyanNastaran Kazemi TofighiShuaijun LiuRanjana YadavPieter Geiregat

Realizing zero-threshold population inversion via plasmonic doping

Mohsin IjazHao ZhangIsabella WagnerFengjiang LiuMargarita SamoliZeger HensPieter GeiregatJustin M. HodgkissRichard J. BlaikieBoyang Ding et al.

A1 Journal Article in NANOSCALE

Super bending-stable flexible colloidal QD photodetector with fast response and near-unity carrier extraction efficiency

Yuhao DengEzat KheradmandChao PangAbu Bakar SiddikJing BaiItai LiebermanPieter GeiregatDries Van ThourhoutZeger Hens

A1 Journal Article in ACS APPLIED MATERIALS & INTERFACES

Transforming 2D imine into 3D thiazole covalent organic frameworks by conjugated connectors : fully conjugated photocatalysts

maojun dengJeet ChakrabortyGuizhen WangKuber Singh RawatLaurens BourdaJiamin SunIpsita NathYanwei JiPieter GeiregatVeronique Van Speybroeck et al.

A1 Journal Article in JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

2024

A silicon photonics waveguide-coupled colloidal quantum dot photodiode sensitive beyond 1.6 um

Chao PangYuhao DengEzat KheradmandLuis Moreno HagelsiebYujie GuoDavid CheynsPieter GeiregatZeger HensDries Van Thourhout

A1 Journal Article in APL PHOTONICS

A silicon photonics waveguide-coupled colloidal quantum dot photodiode sensitive beyond 1.6 μm

Chao PangYu-hao DengEzat KheradmandLuis Moreno HagelsiebYujie GuoDavid CheynsPieter GeiregatZeger HensDries Van Thourhout

A1 Journal Article in APL PHOTONICS

Beyond the free spectral range : on-chip spectrometer with multi-color cascaded colloidal quantum-dot photodiodes

Chao PangRaúl López MarchEzat KheradmandYuhao DengLuis Moreno HagelsiebLukas ElsingerDavid CheynsPieter GeiregatZeger HensDries Van Thourhout

Decoding excimer formation in covalent–organic frameworks induced by morphology and ring torsion

Jeet ChakrabortyAmrita ChatterjeeKorneel MolkensIpsita NathDaniel Arenas EstebanLaurens BourdaGeert WatsonChunhui LiuDries Van ThourhoutSara Bals et al.

A1 Journal Article in ADVANCED MATERIALS

Multi-exciton and phonon dynamics impact intraband transitions in CdSe/ZnS colloidal quantum dots

Ashley M. StingelChilaluck C. KonkankitPieter GeiregatPoul B. Petersen

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY C

Photonic Crystal Surface Emitting Lasers Across the Visible Spectrum Based on Colloidal Quantum Dots

Pieter Geiregat

Photonic crystal surface emitting lasers across the visible spectrum based on colloidal quantum dots

Ivo TangheMargarita SamoliServet Ataberk CayanDries Van ThourhoutZeger HensPieter Geiregat

Short‐wave infrared colloidal QDs photodetector with nanosecond response times enabled by ultrathin absorber layers

Yuhao DengChao PangEzat KheradmandJari LeemansJing BaiMatthias MinjauwJiayi LiuKorneel MolkensJeroen BeeckmanChristophe Detavernier et al.

A1 Journal Article in ADVANCED MATERIALS

Solution processed bulk colloidal nanocrystals as gain material in photonic crystal surface emitting lasers across the green-red spectrum

Ivo TangheMargarita SamoliIsabella WagnerServet Ataberk CayanAli H. KhanKai ChenJustin HodgkissIwan MoreelsDries Van ThourhoutZeger Hens et al.

The impact of partial carrier confinement on stimulated emission in strongly confined perovskite nanocrystals

Pieter GeiregatOnur ErdemMargarita SamoliKai ChenJustin M. HodgkissZeger Hens

A1 Journal Article in ACS NANO

Understanding the mechanisms behind optical gain in bulk solution processible semiconductors

Ivo TangheMargarita SamoliIsabella WagnerServet Ataberk CayanAli H. KhanKai ChenJustin HodgkissIwan MoreelsDries Van ThourhoutZeger Hens et al.

Unraveling the nature of lasing emission from hybrid silicon nitride and colloidal nanocrystal photonic crystals with low refractive index contrast

Ivo TangheTom VandekerckhoveMargarita SamoliAmelia WatersDulanjan HarankahageMikhail ZamkovZeger HensChristian SeassalHai-Son NguyenDries Van Thourhout et al.

A1 Journal Article in ACS PHOTONICS

Using colloidal quantum shells as a novel gain medium for integrated visible lasers

Ivo TangheA. WatersJ. HuangKorneel MolkensTom VandekerckhoveDries Van ThourhoutM. ZamkovPieter Geiregat

2023

A roadmap to decipher ultrafast photophysics in two-dimensional nanomaterials

Pieter SchiettecatteZeger HensPieter Geiregat

A1 Journal Article in JOURNAL OF CHEMICAL PHYSICS

Beyond the band edge : extending the reach of colloidal nanocrystals in active photonic devices

Ivo TangheDries Van ThourhoutPieter Geiregat

Changing the face of phase change memory with Sb2Te3/TiTe2 superlattices

Seppe Van DyckKiumars AryanaWouter DevulderPatrick HopkinsPieter GeiregatChristophe Detavernier

Charge carrier dynamics in colloidally synthesized monolayer MoX2 nanosheets

Chandra Sekhar MutyalaGabriele PippiaIvo TangheBeatriz Martín-GarcíaAnastasia RousakiPeter VandenabeelePieter SchiettecatteIwan MoreelsPieter Geiregat

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY LETTERS

Colloidal CdSe/CdS core/crown nanoplatelets for efficient blue light emission and optical amplification

Carmelita RodàAlessio Di GiacomoLucía Camila Tasende RodríguezChandra Sekhar MutyalaJari LeemansZeger HensPieter GeiregatIwan Moreels

A1 Journal Article in NANO LETTERS

Integrated PbS colloidal quantum dot photodiodes on silicon nitride waveguides

Chao PangYuhao DengEzat KheradmandNithin PoonkottilRobin PetitLukas ElsingerChristophe DetavernierPieter GeiregatZeger HensDries Van Thourhout

A1 Journal Article in ACS PHOTONICS

Integrated spectrometer based on arrayed waveguide grating and PbS colloidal quantum dot photodiode array

Chao PangYuhao DengEzat KheradmandRobin PetitLukas ElsingerChristophe DetavernierPieter GeiregatZeger HensDries Van Thourhout

Narrow homogeneous linewidths and slow cooling dynamics across infrared intra-band transitions in n-doped HgSe colloidal quantum dots

Ashley M. StingelJari LeemansZeger HensPieter GeiregatPoul B. Petersen

A1 Journal Article in JOURNAL OF CHEMICAL PHYSICS

Optical gain and lasing from bulk cadmium sulfide nanocrystals

Ivo TanghePieter Geiregat

Article in a magazine

Optical gain and lasing from bulk cadmium sulfide nanocrystals through bandgap renormalization

Ivo TangheMargarita SamoliIsabell WagnerServet Ataberk CayanAli KhanKai ChenJustin HodgkissIwan MoreelsDries Van ThourhoutZeger Hens et al.

A1 Journal Article in NATURE NANOTECHNOLOGY

Understanding photocatalytic hydrogen peroxide production in pure water for benzothiadiazole-based covalent organic frameworks

Linyang WangJiamin Sunmaojun dengChunhui LiuServet Ataberk CayanKorneel MolkensPieter GeiregatRino MorentNathalie De GeyterJeet Chakraborty et al.

A1 Journal Article in CATALYSIS SCIENCE & TECHNOLOGY

2022

Area-independence of the biexciton oscillator strength in CdSe colloidal nanoplatelets

Carmelita RodàPieter GeiregatAlessio Di GiacomoIwan MoreelsZeger Hens

A1 Journal Article in NANO LETTERS

Broadband and ultrafast optical phase modulation by colloidal 2D semiconductors

Ivo TangheRonnie TammingJustin HodgkissKai ChenShalini SinghDries Van ThourhoutPieter Geiregat

Broadband optical phase modulation by colloidal CdSe quantum wells

Ivo TangheJustinas ButkusKai ChenRonnie R. TammingShalini SinghYera UssembayevKristiaan NeytsDries Van ThourhoutJustin M. HodgkissPieter Geiregat

A1 Journal Article in NANO LETTERS

Coupled micro ring lasers based on hybrid integration of colloidal quantum dots

Korneel MolkensIvo TangheWai Kit NgRiccardo SapienzaPieter GeiregatDries Van Thourhout

Disruptive optical gain in bulk-like CdS quantum dots through strong band gap renormalization

Ivo TangheIsabella WagnerMargarita SamoliKai WenServet Ataberk CayanAli KhanDries Van ThourhoutJustin HodgkissZeger HensIwan Moreels et al.

Disruptive optical gain metrics in the green and near-infrared spectrum using weakly confined CdX (X=S,Se,Te) quantum dots

Ivo TangheServet Ataberk CayanMargarita SamoliIsabella WagnerJustin HodgkissKai ChenIwan MoreelsZeger HensDries Van ThourhoutPieter Geiregat

Enhanced carrier-carrier and carrier-phonon coupling in perovskite quantum dots enables low threshold optical gain

Pieter GeiregatOnur ErdemKai ChenJorick MaesJustin HodgkissZeger Hens

Intraband dynamics of mid-infrared HgTe quantum dots

Matthias RuppertHanh BuiLaxmi Kishore SagarPieter GeiregatZeger HensGabriel BesterNils Huse

A1 Journal Article in NANOSCALE

Light-matter interaction in colloidal CdSe nanoplatelets

Carmelita RodàIwan MoreelsPieter Geiregat

Monolithic heterogeneous integration of PbS colloidal quantum dot photodiode on silicon nitride

Chao PangYu-Hao DengEzat KheradmandRobin PetitLukas ElsingerChristophe DetavernierPieter GeiregatZeger HensDries Van Thourhout

Optical gain in core-only CdSe and Core/crown CdSe/CdS 3.5 monolayer nanoplatelets

Carmelita RodàAlessio Di GiacomoPieter GeiregatIwan Moreels

Quantum dot lasing from a waterproof and stretchable polymer film

Mohammad MohammadimasoudiPieter GeiregatFrederik Van AckerJeroen BeeckmanZeger HensTangi AubertKristiaan Neyts

A1 Journal Article in LIGHT-SCIENCE & APPLICATIONS

Role of thermally occupied hole states in room‐temperature broadband gain in CdSe/CdS giant‐shell nanocrystals

Ivo TangheJordi LlusarJuan I. ClimenteAlex BarkerGiuseppe PaternòFrancesco ScotognellaAnatolii PolovitsynAli Hossain KhanZeger HensDries Van Thourhout et al.

A1 Journal Article in ADVANCED OPTICAL MATERIALS

Slow hole localization and fast electron cooling in Cu-doped InP/ZnSe quantum dots

P. Tim PrinsDirk A. W. SpruijtMark J. J. MangnusFreddy T. RabouwDaniel VanmaekelberghCelso de Mello DonegaPieter Geiregat

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY LETTERS

State filling and stimulated emission by colloidal InP/ZnSe core/shell quantum dots

Filipe Sousa VelosaHannes Van AvermaetPieter SchiettecatteLeila MingabudinovaPieter GeiregatZeger Hens

A1 Journal Article in ADVANCED OPTICAL MATERIALS

Stimulated emission from stable bipolaron states in fully inorganic perovskite quantum wells

Pieter GeiregatIsabella WagnerKai ChenJustin HodgkissZeger Hens

Stimulated emission via multi-exciton complexes in colloidal 2D materials

Pieter GeiregatIsabella WagnerJustin HodgkissKai ChenZeger Hens

Ultrafast continuum infrared spectroscopy of n-type HgSe quantum dots

Pieter GeiregatAshley StingelPoul PetersenJari LeemansZeger Hens

Unraveling the photophysics of liquid-phase exfoliated two-dimensional ReS2 nanoflakes

Deepika PooniaPieter SchiettecatteIvo TangheSourav MaitiMichele FaillaSachin KingeZeger HensLaurens SiebbelesPieter Geiregat

2021

Dye-sensitized Er3+-doped CaF2 nanoparticles for enhanced near-infrared emission at 1.5 µm

Jing LiuFlavia ArtizzuMin ZengLuca PiliaPieter GeiregatRik Van Deun

A1 Journal Article in PHOTONICS RESEARCH

Electrically pumped QD light emission from LEDs to lasers

Longjia WuPieter GeiregatWenyong LiuZizhe LuYiran YanXiongfeng LinIwan MoreelsXiaolin YanZeger HensYixing Yang

A4 Journal Article in INFORMATION DISPLAY

Extended and localized states in colloidal quantum dots based microring lasers

Korneel MolkensIvo TangheD. SaxenaW. Kit NgR. SapienzaPieter GeiregatDries Van Thourhout

Generating triplets in organic semiconductor tetracene upon photoexcitation of transition metal dichalcogenide ReS2

Sourav MaitiDeepika PooniaPieter SchiettecatteZeger HensPieter GeiregatSachin KingeLaurens D.A. Siebbeles

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY LETTERS

Localization-limited exciton oscillator strength in colloidal CdSe nanoplatelets revealed by the optically induced stark effect

Pieter GeiregatCarmelita RodàIvo TangheShalini SinghAlessio Di GiacomoDelphine Misao LebrunGianluca GrimaldiJorick MaesDries Van ThourhoutIwan Moreels et al.

A1 Journal Article in LIGHT-SCIENCE & APPLICATIONS

Molecular size matters : ultrafast dye singlet sensitization pathways to bright nanoparticle emission

Jing LiuPieter GeiregatLuca PiliaRik Van DeunFlavia Artizzu

A1 Journal Article in ADVANCED OPTICAL MATERIALS

Stimulated emission from stable multiexciton-polaron states in fully inorganic perovskite quantum wells

Isabella WagnerKai ChenJustin HodgkissZeger HensPieter Geiregat

Stimulated emission through an electron-hole plasma in colloidal CdSe quantum rings

Carmelita RodàBastiaan B.V SalzmannIsabella WagnerYera UssembayevKai ChenJustin HodgkissIwan MoreelsKristiaan NeytsDaniel VanmaekelberghPieter Geiregat

Stimulated emission through an electron–hole plasma in colloidal CdSe quantum rings

Carmelita RodàBastiaan B. V. SalzmannIsabella WagnerYera UssembayevKai ChenJustin M. HodgkissKristiaan NeytsIwan MoreelsDaniel VanmaekelberghPieter Geiregat

A1 Journal Article in NANO LETTERS

The fine-structure constant as a ruler for the band-edge light absorption strength of bulk and quantum-confined semiconductors

P. Tim PrinsMaryam Alimoradi JaziNiall A. KillileaWiel H. EversPieter GeiregatWolfgang HeissArjan J. HoutepenChristophe DelerueZeger HensDaniel Vanmaekelbergh

A1 Journal Article in NANO LETTERS

Unraveling the photophysics of liquid-phase exfoliated two-dimensional ReS2 nanoflakes

Pieter SchiettecatteDeepika PooniaIvo TangheSourav MaitiMichele FaillaSachin KingeZeger HensLaurens D. A. SiebbelesPieter Geiregat

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY C

Waveguide‐coupled colloidal quantum dot light emitting diodes and detectors on a silicon nitride platform

Lukas ElsingerRobin PetitFrederik Van AckerNatalia Klaudia ZawackaIvo TangheKristiaan NeytsChristophe DetavernierPieter GeiregatZeger HensDries Van Thourhout

A1 Journal Article in LASER & PHOTONICS REVIEWS

2020

A waveguide-coupled colloidal quantum dot LED on a silicon nitride platform

Lukas ElsingerIvo TangheFrederik Van AckerNatalia Klaudia ZawackaRobin PetitKristiaan NeytsChristophe DetavernierPieter GeiregatZeger HensDries Van Thourhout

Controlling energy transfer routes in dye-sensitized lanthanide-based nanoparticles for enhanced emission

Jing LiuRik Van DeunLuca PiliaPieter GeiregatFlavia Artizzu

Liquid-phase exfoliation of rhenium disulfide by solubility parameter matching

Pieter SchiettecatteAnastasia RousakiPeter VandenabeelePieter GeiregatZeger Hens

A1 Journal Article in LANGMUIR

Phonon-mediated and weakly size-dependent electron and hole cooling in CsPbBr3 nanocrystals revealed by atomistic simulations and ultrafast spectroscopy

Simon C. BoehmeStephanie ten BrinckJorick MaesNuri YazdaniFelipe ZapataKai ChenVanessa WoodJustin M. HodgkissZeger HensPieter Geiregat et al.

A1 Journal Article in NANO LETTERS

2019

A bright future for colloidal quantum dot lasers

Pieter GeiregatDries Van ThourhoutZeger Hens

A1 Journal Article in NPG ASIA MATERIALS

A thermodynamic equilibrium between excitons and excitonic molecules dictates optical gain in colloidal CdSe quantum wells

Pieter GeiregatRenu TomarKai ChenShalini SinghJustin M HodgkissZeger Hens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY LETTERS

Charge carrier cooling bottleneck opens up nonexcitonic gain mechanisms in colloidal CdSe quantum wells

Renu TomarAditya KulkarniKai ChenShalini SinghDries Van ThourhoutJustin M. HodgkissLaurens D.A. SiebbelesZeger HensPieter Geiregat

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY C

Optical gain spectroscopy of solution processable 2D materials : a playground for excitons, molecules and free charge carriers

Pieter GeiregatRenu TomarKai ChenShalini SinghLaurens SiebbelesAditya KulkarniJustin HodgkissZeger Hens

Optical gain spectroscopy of solution processable 2D materials for integrated micro-lasers

Renu TomarIvo TangheAditya KulkarniKai ChenJustin HodgkissLaurens SiebbelesDries Van ThourhoutZeger HensPieter Geiregat

Tunable and efficient red to near-infrared photoluminescence by synergistic exploitation of core and surface silver doping of CdSe nanoplatelets

Ali KhanValerio PinchettiIvo TangheZhiya DangBeatriz Martín-GarcíaZeger HensDries Van ThourhoutPieter GeiregatSergio BrovelliIwan Moreels

A1 Journal Article in CHEMISTRY OF MATERIALS

Ultrafast carrier dynamics in colloidal WS2 nanosheets

Pengshang ZhouIvo TanghePieter SchiettecatteDries Van ThourhoutZeger HensPieter Geiregat

Ultrafast carrier dynamics in colloidal WS2 nanosheets obtained through a hot injection synthesis

Pengshang ZhouIvo TanghePieter SchiettecatteDries Van ThourhoutZeger HensPieter Geiregat

A1 Journal Article in JOURNAL OF CHEMICAL PHYSICS

Ultrafast carrier dynamics in few-layer colloidal molybdenum disulfide probed by broadband transient absorption spectroscopy

Pieter SchiettecattePieter GeiregatZeger Hens

Ultrafast carrier dynamics in few-layer colloidal molybdenum disulfide probed by broadband transient absorption spectroscopy

Pieter SchiettecattePieter GeiregatZeger Hens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY C

Using bulk-like nanocrystals to probe intrinsic optical gain characteristics of inorganic lead halide perovskites

Pieter GeiregatJorick MaesKai ChenEmile DrijversJonathan De RooJustin HodgkissZeger Hens

Using bulk-like nanocrystals to probe intrinsic optical gain characteristics of inorganic lead halide perovskites

Pieter GeiregatJorick MaesKai ChenEmile DrijversJonathan De RooJustin HodgkissZeger Hens

2018

A hybrid SiN-QDOT platform for visible photonics

Lukas ElsingerYunpeng ZhuWeiqiang XieIvo TangheSuzanne BisschopVigneshwaran ChandrasekaranEdouard BrainisPieter GeiregatZeger HensDries Van Thourhout

A quantitative study of optical gain mechanism in quasi 2D nanoscale materials

Renu TomarPieter GeiregatAditya KulkarniKai ChenShalini SinghLaurens SiebbelesJustin HodgkissZeger Hens

A quantitative study of optical gain mechanisms in quasi-2D nanoscale materials

Renu TomarPieter GeiregatAditya KulkarniKai ChenShalini SinghLaurens SiebbelesJustin HodgkissZeger Hens

A quantitative study of optical gain mechanisms in quasi-2D solution processable materials

Renu TomarAditya KulkarniKai ChenShalini SinghLaurens SiebbelesJustin HodgkissPieter GeiregatZeger Hens

Asymmetric optical transitions determine the onset of carrier multiplication in lead chalcogenide quantum confined and bulk crystals

Frank CM SpoorGianluca GrimaldiChristophe DelerueWiel H EversRyan W CrispPieter GeiregatZeger HensArjan J HoutepenLaurens DA Siebbeles

A1 Journal Article in ACS NANO

Carrier scattering induced linewidth broadening in in situ P-doped Ge layers on Si

Srinivasan Ashwyn SrinivasanC. PorretM. PantouvakiY. ShimuraPieter GeiregatR. LooJ. Van CampenhoutDries Van Thourhout

A1 Journal Article in APPLIED PHYSICS LETTERS

Colloidal CdSe nanoplatelets, a model for surface chemistry/optoelectronic property relations in semiconductor nanocrystals

Shalini SinghRenu TomarStephanie ten BrinckJonathan De RooPieter GeiregatJosé MartinsIvan InfanteZeger Hens

A1 Journal Article in JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Continuous-wave infrared optical gain and amplified spontaneous emission at ultralow threshold by colloidal HgTe quantum dots

Pieter GeiregatArjan HoutepenLaxmi Kishore SagarIvan InfanteFelipe ZapataValeriia GrigelGuy AllanChristophe DelerueDries Van ThourhoutZeger Hens

A1 Journal Article in NATURE MATERIALS

Doping InP quantum dots with Cu+ slows down hot electron cooling

Tim PrinsPieter GeiregatDirk SpruytFreddy RabouwCelso De Mello DonegaDaniel Vanmaekelbergh

Fabrication and characterization of SiNx/Au cavities with colloidal nanocrystals

Suzanne BisschopPieter GeiregatLukas ElsingerEmile DrijversDries Van ThourhoutZeger HensEdouard Brainis

A1 Journal Article in OPTICS EXPRESS

High-contrast quantum-confined Stark effect in Ge/SiGe quantum well stacks on Si with ultra-thin buffer layers

Srinivasan Ashwyn SrinivasanC PorretE VissersPieter GeiregatDries Van ThourhoutR LooM PantouvakiJ Van Campenhout

Light absorption coefficient of CsPbBr3 perovskite nanocrystals

Jorick MaesLieve BalcaenEmile DrijversQiang ZhaoJonathan De RooAndré VantommeFrank VanhaeckePieter GeiregatZeger Hens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY LETTERS

Observation of a coherent signal at negative time delays in HgTe quantum dots

Matthias RupertPieter GeiregatZeger HensNils Huse

On-chip single-photon emission from deterministically positioned and embedded InP-based colloidal quantum dots

Vigneshwaran ChandrasekaranDorian DupontMickaël TessierPieter GeiregatLukas ElsingerYunpeng ZhuLorenzo ScarpelliFrancesco MasiaWolfgang LangbeinDries Van Thourhout et al.

Optically induced Stark effect and the exciton oscillator strength in quasi-2D CdSe nanoplatelets

Pieter GeiregatIvo TangheRenu TomarGianluca GrimaldiJorick MaesArjan HoutepenZeger Hens

Sideband pump-probe technique resolves nonlinear modulation response of PbS/CdS quantum dots on a silicon nitride waveguide

Mirco KolarczikChristian UlbrichPieter GeiregatYunpeng ZhuLaxmi Kishore SagarAkshay SinghBastian HerzogAlexander W AchtsteinXiaoqin LiDries Van Thourhout et al.

A1 Journal Article in APL PHOTONICS

Spectral dynamics of linearly polarized bright exciton in InP/ZnSe colloidal quantum dots

Vigneshwaran ChandrasekaranLorenzo ScarpelliFrancesco MasiaDorian DupontMickäel D TessierPieter GeiregatIwan MoreelsWolgang LangbeinZeger Hens

Spectroscopy of single colloidal quantum dots

Vigneshwaran ChandrasekaranDorian DupontMickaël TessierPieter GeiregatLorenzo ScarpelliFrancesco MasiaWolfgang LangbeinZeger Hens

The impact of core/shell sizes on the optical gain characteristics of CdSe/CdS quantum dots

Suzanne BisschopPieter GeiregatTangi AubertZeger Hens

A1 Journal Article in ACS NANO

The role of quantum confinement in optical gain development in lead tri-halide perovskite quantum dots

Pieter GeiregatKai ChenJorick MaesLieve BalcaenEmile DrijversJustin HodgkissZeger Hens

Ultrafast carrier dynamics in colloidally synthesized molybdenum disulfide probed by transient absorption spectroscopy

Pieter SchiettecattePieter GeiregatZeger Hens

Ultrafast phase modulation in CdSe colloidal quantum wells

Ivo TangheKai ChenRenu TomarShalini SinghIwan MoreelsJustin M. HodgkissDries Van ThourhoutZeger HensPieter Geiregat

Using bulk-like nanocrystals to probe intrinsic optical gain characteristics of inorganic lead halide perovskites

Pieter GeiregatJorick MaesKai ChenEmile DrijversJonathan De RooJustin M HodgkissZeger Hens

A1 Journal Article in ACS NANO

2017

A quantitative study of the material gain in colloidal core/shell quantum dots

Suzanne BisschopPieter GeiregatTangi AubertDries Van ThourhoutEdouard BrainisZeger Hens

Analysis of homogeneous broadening in n-type doped Ge layers on Si for laser application

Srinivasan Ashwyn SrinivasanC. PorretM. PantouvakiY. ShimuraPieter GeiregatR. LooJ. Van CampenhoutDries Van Thourhout

Colloidal quantum dots enabling coherent light sources for integrated silicon-nitride photonics

Weiqiang XieYunpeng ZhuSuzanne BisschopTangi AubertZeger HensDries Van ThourhoutPieter Geiregat

A1 Journal Article in IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS

HgSe/CdE (E = S, Se) core/shell nanocrystals by colloidal atomic layer deposition

Laxmi ChilukaWillem WalravensJorick MaesPieter GeiregatZeger Hens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY C

Modeling of cesium lead halide perovskite nanocrystals and their electron and hole cooling rates

Stephanie Ten BrinckFelipe ZapataPieter GeiregatZeger HensIvan Infante

Nearly blinking-free, high-purity single-photon emission by colloidal InP/ZnSe quantum dots

Vigneshwaran ChandrasekaranMickaël TessierDorian DupontPieter GeiregatZeger HensEdouard Brainis

A1 Journal Article in NANO LETTERS

Observation of broadband optical gain in quasi-2D CdSe nanoplatelets

Renu TomarShalini SinghMicheal BeckerThilo StoeferleRainer F. ZMahrtZeger HensPieter Geiregat

On-chip integrated quantum-dot-silicon-nitride microdisk lasers

Weiqiang XieThilo StöferleGabriele RainòTangi AubertSuzanne BisschopYunpeng ZhuRainer F MahrtPieter GeiregatEdouard BrainisZeger Hens et al.

A1 Journal Article in ADVANCED MATERIALS

On-chip low threshold silicon nitride distributed feedback colloidal quantum dot laser

Yunpeng ZhuWeiqiang XiePieter GeiregatSuzanne BisschopTangi AubertEdouard BrainisZeger HensDries Van Thourhout

On-chip single-mode distributed feedback colloidal quantum dot laser under nanosecond pumping

Yunpeng ZhuWeiqiang XieSuzanne BisschopTangi AubertEdouard BrainisPieter GeiregatZeger HensDries Van Thourhout

A1 Journal Article in ACS PHOTONICS

Reduction of optical bleaching in phosphorus doped ge layer on si

Srinivasan Ashwyn SrinivasanC. PorretM. PantouvakiY. ShimuraPieter GeiregatR. LooJ. Van CampenhoutDries Van Thourhout

Single photon sources from InP based colloidal quantum dots

Vigneshwaran ChandrasekaranMickaël TessierDorian DupontPieter GeiregatEdouard BrainisZeger Hens

2016

A case study of ALD encapsulation of quantum dots: embedding supported CdSe/CdS/ZnS quantum dots in a ZnO matrix

Kilian Devloo-CasierPieter GeiregatKarl F LudwigKoen van StiphoutAndre VantommeZeger HensChristophe DetavernierJolien Dendooven

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY C

A correlation between the carrier plasma temperature and optical gain in quasi-2D CdSe platelets

Renu TomarMichael BeckerThilo StöferleRainer MahrtZeger HensPieter Geiregat

All-optical wavelength conversion by hot carrier intraband absorption in colloidal PbS quantum dots

Pieter GeiregatArjan HoutepenDries Van ThourhoutZeger Hens

All-optical wavelength conversion by picosecond burst absorption in colloidal PbS quantum dots

Pieter GeiregatArjan HoutepenDries Van ThourhoutZeger Hens

A1 Journal Article in ACS NANO

Biexciton-mediated modulation response of colloidal quantum dots deposited on a silicon nitride waveguide at high laser excitation rate

M. KolarczikB. HerzogC. UlbrichY. KaptanU. WoggonN. OschimikowA. SinghX. LiYunpeng ZhuDries Van Thourhout et al.

Colloidal atomic layer deposition : a versatile method to synthesize core-shell nanocrystals in the infrared

Laxmi ChilukaPieter GeiregatWillem WalravensZeger Hens

Colloidal atomic layer deposition: a versatile method to synthesize core-shell nanocrystals in the infrared

Laxmi ChilukaPieter GeiregatWillem WalravensZeger Hens

Electron-phonon coupling and single-exciton optical gain in semiconductor nanocrystals

Pieter GeiregatGuy AllanZeger HensChristophe Delerue

Fabrication and characterization of SiNx/Au nanopatch cavities with colloidal nanocrystals

Suzanne BisschopPieter GeiregatZeger HensDries Van ThourhoutEdouard Brainis

Highly dynamic ligand binding and light absorption coefficient of cesium lead Bromide perovskite nanocrystals

Jonathan De RooMaria IbanezPieter GeiregatGeorgian NedelcuWillem WalravensJorick MaesJosé MartinsIsabel Van DriesscheMaksym V KoyalenkoZeger Hens

A1 Journal Article in ACS NANO

Highly dynamic ligand binding and light absorption coefficient of cesium lead bromide perovskite nanocrystals

Jonathan De RooMaria IbanezPieter GeiregatGeorgian NedelcuWillem WalravensJorick MaesJosé MartinsIsabel Van DriesscheMaksym KovalenkoZeger Hens

Hybrid colloidal quantum dot silicon nitride waveguide gain measurement based on variable stripe length method

Yunpeng ZhuWeiqiang XiePieter GeiregatSuzanne BisschopTangi AubertEdouard BrainisZeger HensDries Van Thourhout

Infrared optical gain at ultralow threshold by colloidal HgTe quantum dots

Pieter GeiregatArjan HoutepenLaxmi ChilukaGuy AllanChristophe DelerueDries Van ThourhoutZeger Hens

Optical gain in solution processable 2D CdSe nano-platelets

Renu TomarMickaël TessierPieter GeiregatZeger Hens

Optical gain with colloidal quantum dots : from material photo-physics to integrated devices

Suzanne BisschopPieter GeiregatYunpeng ZhuWeiqiang XieT AubertE BrainisD Van ThourhoutZ Hens

Origin of carrier multiplication in PbS and PbSe quantum dots

Gianluca GrimaldiFrank SpoorPieter GeiregatZeger HensArjan HoutepenLaurens Siebbeles

PbS/CdS Core/Shell quantum dots by additive, layer-by-layer shell growth

Laxmi ChilukaWillem WalravensQiang ZhaoAndré VantommePieter GeiregatZeger Hens

A1 Journal Article in CHEMISTRY OF MATERIALS

PbS/CdS quantum dots as an active medium in ultrafast nanophotonics

Christian UlbrichMirco KolarczikPieter GeiregatYunpeng ZhuAkshay SinghBastian HerzogYücel KaptanXiaoqin LiDries Van ThourhoutZeger Hens et al.

Revisited Wurtzite CdSe synthesis : a gateway for the versatile flash synthesis of multishell quantum dots and rods

Emile DrijversJonathan De RooPieter GeiregatKrisztina FehérZeger HensTangi Aubert

A1 Journal Article in CHEMISTRY OF MATERIALS

Single-exciton optical gain in semiconductor nanocrystals : positive role of electron-phonon coupling

Pieter GeiregatGuy AllanZeger HensChristophe Delerue

A1 Journal Article in PHYSICAL REVIEW B

2015

A phonon scattering bottleneck for carrier cooling in lead chalcogenide nanocrystals

Pieter GeiregatChristophe DelerueYolanda Justo ZarraquiñosMichiel AertsFrank SpoorDries Van ThourhoutLaurens DA SiebbelesGuy AllanArjan HoutepenZeger Hens

A1 Journal Article in ACS NANO

A phonon scattering bottleneck for carrier cooling in lead-chalcogenide nanocrystals

Pieter GeiregatChristophe DelerueYolanda Justo ZarraquiñosMichiel AertsFrank SpoorDries Van ThourhoutLaurens SiebbelesGuy AllanArjan HoutepenZeger Hens

A phonon scattering bottleneck for carrier cooling in lead-chalcogenide nanocrystals

Pieter GeiregatChristophe DelerueYolanda Justo ZarraquiñosMichiel AertsFrank SpoorDries Van ThourhoutLaurens D.A. SiebbelesGuy AllanArjan HoutepenZeger Hens

Colloidal quantum dots for guided wave photonics : from optical gain to ultrafast modulation

Pieter GeiregatDries Van ThourhoutZeger Hens

Low power all-optical wavelength conversion with terahertz refresh rates using colloidal nanocrystals

Pieter GeiregatArjan HoutepenDries Van ThourhoutZeger Hens

Picosecond all-optical wavelength conversion using hot carrier intraband absorption in colloidal PbS nanocrystals

Pieter GeiregatArjan HoutepenFerdinand GrozemaDries Van ThourhoutZeger Hens

Picosecond all-optical wavelength conversion using hot carrier intraband absorption in colloidal PbS nanocrystals

Pieter GeiregatArjan HoutepenFerdinand C GrozemaDries Van ThourhoutZeger Hens

Subwavelength nanopatch SiN/Au nanocavities with colloidal nanocrystals

Suzanne BisschopJoachim CiersAntoine GuillePieter GeiregatEdouard BrainisZeger HensDries Van Thourhout

Synthesis of novel HgSe/CdS and HgSe/CdSe core-shell nanocrystals by C-ALD approach in the infra-red

Laxmi ChilukaPieter GeiregatWillem WalravensZeger Hens

2014

Coulomb shifts upon exciton addition to photoexcited PbS colloidal quantum dots

Pieter GeiregatArjan HoutepenYolanda Justo ZarraquiñosFerdinand C GrozemaDries Van ThourhoutZeger Hens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY C

Hyperspectral analysis of ultrafast hot carrier dynamics in Pb-chalcogenide nanocrystals : a case for slow cooling

Pieter GeiregatArjan HoutepenMichiel AertsChristophe DelerueDries Van ThourhoutZeger Hens

In situ synchrotron based XRF and GISAXS study of ALD encapsulation of supported nanocrystals

Kilian Devloo-CasierJolien DendoovenPieter GeiregatKarl LudwigZeger HensChristophe Detavernier

Modeling the optical properties of low-cost colloidal quantum dot functionalized Strip SOI waveguides

Abdoulghafar OmariWeiqiang XiePieter GeiregatDries Van ThourhoutZeger Hens

A1 Journal Article in IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS

Near-threshold optical gain using colloidal HgTe quantum dots

Pieter GeiregatArjan HoutepenLK SagarC DelerueFC GrozemaG AllanDries Van ThourhoutZeger Hens

Near-thresholdless optical gain using colloidal HgTe nanocrystals

Pieter GeiregatArjan HoutepenChristophe DelerueGuy AllanLaxmi ChilukaFerdinand GrozemaDries Van ThourhoutZeger Hens

Properties and dynamics of cooling charge carriers in lead sulfide quantum dots

Pieter GeiregatArjan HoutepenDries Van ThourhoutChristophe DelerueZeger Hens

Properties and dynamics of cooling charge carriers in lead sulfide quantum dots

Pieter GeiregatArjan HoutepenMichiel AertsDries Van ThourhoutChristophe DelerueZeger Hens

Properties and dynamics of cooling charge carriers in lead sulfide quantum dots

Pieter GeiregatArjan HoutepenM AertsDries Van ThourhoutC DelerueZeger Hens

Properties of dynamics of cooling charge carriers in lead sulfide quantum dots

Pieter GeiregatArjan HoutepenDries Van ThourhoutC DelerueZeger Hens

Synthesis of HgTe QDs in the 1000-2500nm spectral range

Laxmi ChilukaPieter GeiregatStijn FlaméeJonathan De RooYolanda Justo ZarraquiñosZeger Hens

Synthesis of HgTe QDs in the 1000-2500nm spectral range

Laxmi ChilukaPieter GeiregatStijn FlaméeJonathan De RooYolanda Justo ZarraquiñosZeger Hens

Thresholdless optical gain using colloidal HgTe nanocrystals

Pieter GeiregatArjan HoutepenLK SagarC DelerueDries Van ThourhoutZeger Hens

2013

Absorption enhancement in 2D nanocrystal superlattices through near-field dipolar coupling: a novel optical phenomenon at the nanoscale

Pieter GeiregatAbdoulghafar OmariYolanda Justo ZarraquiñosDries Van ThourhoutZeger Hens

Assessing colloidal quantum dot optical properties through free standing layers on photonic waveguides

Abdoulghafar OmariPieter GeiregatDries Van ThourhoutZeger Hens

Embedding colloidal nanocrystals in silicon nitride micro-disk resonators: from mode-mapping to single dot spectroscopy

Bram De GeyterPieter GeiregatKasia KomorowskaAntti HassinenEdouard BrainisDries Van ThourhoutZeger Hens

Giant and broad-band absorption enhancement in colloidal quantum dot mono layers through dipolar coupling

Pieter GeiregatYolanda Justo ZarraquiñosSofie AbéStijn FlaméeZeger Hens

A1 Journal Article in ACS NANO

Giant and broadband absorption enhancement incColloidal nanocrystal superlattices through dipolar coupling

Pieter GeiregatYolanda Justo ZarraquiñosStijn FlaméeSofie AbéZeger Hens

In situ GISAXS during atomic layer deposition of oxides on ordered quantum dots

Kilian Devloo-CasierJolien DendoovenKarl LudwigPieter GeiregatZeger HensChristophe Detavernier

Light absorption in hybrid silicon-on-insulator/quantum dot waveguides

Abdoulghafar OmariPieter GeiregatDries Van ThourhoutZeger Hens

A1 Journal Article in OPTICS EXPRESS

Modelling colloidal quantum dots on SOI photonic waveguides

Abdoulghafar OmariPieter GeiregatDries Van ThourhoutZeger Hens

Optical properties of PbS/CdS core/shell quantum dots

Yolanda Justo ZarraquiñosPieter GeiregatKaren Van HoeckeFrank VanhaeckeCelso De Mello DonegaZeger Hens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY C

Optical properties of SOI waveguides functionalized with close-packed quantum dot films

Zeger HensAbdoulghafar OmariPieter GeiregatDries Van Thourhout

2012

Broadband and picosecond intraband absorption in lead based colloidal quantum dots

Bram De GeyterPieter GeiregatYunan GaoSybren ten CateArjan J HoutepenJuleon M SchinsDries Van ThourhoutLaurens DA SiebbelesZeger Hens

Broadband and picosecond intraband absorption in lead-based colloidal quantum dots

Bram De GeyterArjan J HoutepenSergio CarrilloPieter GeiregatYunan GaoSybren ten CateJuleon M SchinsDries Van ThourhoutChristophe DelerueLaurens DA Siebbeles et al.

A1 Journal Article in ACS NANO

Characterization of Pbs/CdS Qdot absorption on SOI waveguides

Abdoulghafar OmariHiroyuki ShinchiPieter GeiregatDries Van ThourhoutZeger Hens

From fabrication to mode mapping in silicon nitride microdisks with embedded colloidal quantum dots

Bram De GeyterKatarzyna KomorowskaEdouard BrainisPhilippe EmplitPieter GeiregatAntti HassinenZeger HensDries Van Thourhout

A1 Journal Article in APPLIED PHYSICS LETTERS

Multiple Dot-in-Rod PbS/CdS heterostructures with high photoluminescence quantum yield in the near-infrared

Yolanda Justo ZarraquiñosBart GorisJohn Sundar KamalPieter GeiregatSara BalsZeger Hens

A1 Journal Article in JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Nanoscale area selective ZnO growth between a monolayer of nanocrystals

Kilian Devloo-CasierJolien DendoovenKarl LudwigPieter GeiregatZeger HensChristophe Detavernier

Ultrafast intraband absorption in lead-chalcogenide core and core/shell nanocrystals for near- to mid-IR all-optical signal processing

Bram De GeyterPieter GeiregatArjan HoutepenLaurens SiebellesYunan GaoSergio CarrilloCristophe DelerueDries Van ThourhoutZeger Hens

2011

Design of integrated nanocrystal light sources

Qi LuPieter GeiregatZeger HensDries Van Thourhout

Giant absorption enhancement in colloidal quantum dot supercrystals through dipolar coupling

Pieter GeiregatYolanda Justo ZarraquiñosZeger Hens

Ultrafast photoinduced intraband absorption in PbS, PbSe and PbSe/CdSe core/shell nanocrystals for near-infrared to mid-infrared all-optical signal processing

Bram De GeyterPieter GeiregatArjan J HoutepenDries Van ThourhoutLaurens D SiebbelesZeger Hens