Research Explorer

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Researcher

Koen Alexander

Awards & Distinctions

25 Results

2020

Influence of longitudinal mode components on second harmonic generation in III-V-on-insulator nanowires

Charles CiretKoen AlexanderNicolas PoulvellarieMaximilien BilletCarlos Mas ArabiBart KuykenSimon-Pierre GorzaFrancois Leo

A1 Journal Article in OPTICS EXPRESS

Second-harmonic generation enabled by longitudinal electric-field components in photonic wire waveguides

Nicolas PoulvellarieUtsav DaveKoen AlexanderCharles CiretMaximilien BilletCarlos Mas ArabiFabrice RaineriSylvain CombriéAlfredo De RossiGünther Roelkens et al.

A1 Journal Article in PHYSICAL REVIEW A

2019

Experimental observation of second harmonic generation enabled by longitudinal components in indium gallium phosphide nanowires

Nicolas PoulvellarieUtsav Deepak DaveKoen AlexanderCharles CiretSimon-Pierre GorzaFabrice RaineriSylvain CombrieAlfredo De RossiGünther RoelkensBart Kuyken et al.

Hybrid PZT/Si TM/TE electro-optic phase modulators

Gilles Freddy FeutmbaJohn P. GeorgeKoen AlexanderDries Van ThourhoutJeroen Beeckman

Nanophotonic PZT-on-SiN pockels modulators

Koen AlexanderJohn Puthenparampil GeorgeGilles Freddy FeutmbaIsaac Luntadila LufungulaKristiaan NeytsBart KuykenJeroen BeeckmanDries Van Thourhout

Nanophotonic PZT-on-SiN pockels modulators

Koen AlexanderJohn P. GeorgeGilles Freddy FeutmbaIsaac Luntadila LufungulaKristiaan NeytsBart KuykenJeroen BeeckmanDries Van Thourhout

Second harmonic generation induced by longitudinal components in indium gallium phosphide nanowaveguides

Nicolas PoulvellarieUtsav Deepak DaveKoen AlexanderCharles CiretFabrice RaineriSylvain CombriéAlfredo De RossiGünther RoelkensSimon-Pierre GorzaBart Kuyken et al.

2018

Advances in PZT-on-SiN electro-optic modulator platform

John Puthenparampil GeorgeKoen AlexanderBart KuykenDries Van ThourhoutJeroen Beeckman

Electrically tunable nonlinear refraction and absorption in graphene-covered SiN waveguides

Koen AlexanderBart KuykenDries Van Thourhout

Gate-tunable nonlinear refraction and absorption in graphene-covered silicon nitride waveguides

Koen AlexanderNadja A. SavostianovaSergey A. MikhailovDries Van ThourhoutBart Kuyken

A1 Journal Article in ACS PHOTONICS

Integrated silicon nitride photonics with highly nonlinear thin films and 2D materials : properties and devices

Koen AlexanderDries Van ThourhoutBart Kuyken

Nanophotonic Pockels modulators on a silicon nitride platform

Koen AlexanderJohn Puthenparampil GeorgeJochem VerbistKristiaan NeytsBart KuykenDries Van ThourhoutJeroen Beeckman

A1 Journal Article in NATURE COMMUNICATIONS

Optimization of hybrid PZT/Si electro-optic phase modulators

Gilles Freddy FeutmbaJohn Puthenparampil GeorgeKoen AlexanderDries Van ThourhoutJeroen Beeckman

Second harmonic generation by mixing longitudinal and transverse electric field components in indium gallium phosphide-on-insulator wire waveguides

Utsav Deepak DaveNicolas PoulvellarieKoen AlexanderS.P. GorzaF. RaineriS. CombrieA. De RossiGünther RoelkensBart KuykenF. Leo

2017

Broadband electro-optic modulation using low-loss PZT-on-silicon nitride integrated waveguides

Koen AlexanderJohn Puthenparampil GeorgeBart KuykenJeroen BeeckmanDries Van Thourhout

Electrically tunable optical nonlinearities in graphene-covered SiN waveguides characterized by four-wave mixing

Koen AlexanderNadja A. SavostianovaSergey A. MikhailovBart KuykenDries Van Thourhout

A1 Journal Article in ACS PHOTONICS

Electrically tunable optical nonlinearity of graphene-covered SiN waveguides

Koen AlexanderMuhammad MohsinUtsav Deepak DaveLeili Abdollahi ShiraminStéphane ClemmenDaniel NeumaierBart KuykenDries Van Thourhout

Hybrid graphene-silicon photonics devices for telecom and datacom

Dries Van ThourhoutLeili Abdollahi ShiraminChiara AlessandriKoen AlexanderBart KuykenM. PantouvakiI. AsselberghsS. BremsJ. Van CampenhoutC. Huygebaert

New materials for modulators and switches in silicon photonics

Dries Van ThourhoutMarianna PantouvakiHerbert D'heerKoen AlexanderBart KuykenInge AsselberghsSteven BremsCedric HuyghebaertLeili Abdollahi ShiraminChiara Alessandri et al.

2016

Characterization of graphene-covered SiN waveguide using four-wave mixing

Koen AlexanderBart KuykenDries Van Thourhout

2015

Electrically controllable saturable absorption in hybrid graphene-silicon waveguides

Koen AlexanderYingtao HuM PantouvakiS BremsI AsselberghsSP GorzaC HuyghebaertJ Van CampenhoutBart KuykenDries Van Thourhout

Hybrid graphene-silicon photonics devices

Dries Van ThourhoutYingtao HuM PantouvakiKoen AlexanderBart KuykenS BremsI AsselberghsC HuyghebaertC AlessandriP Absil et al.

2014

Cascadable excitability in optically injected microdisks

Thomas Van VaerenberghKoen AlexanderMartin FiersPauline MechetJoni DambrePeter Bienstman

2013

Excitability in optically injected microdisk lasers with phase controlled excitatory and inhibitory response

Koen AlexanderThomas Van VaerenberghMartin FiersPauline MechetJoni DambrePeter Bienstman

A1 Journal Article in OPTICS EXPRESS

Excitation transfer between optically injected microdisk lasers

Thomas Van VaerenberghKoen AlexanderJoni DambrePeter Bienstman

A1 Journal Article in OPTICS EXPRESS