Spin-lasers with periodic gratings: Toward ultrafast polarization modulation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F22%3A10251724" target="_blank" >RIV/61989100:27360/22:10251724 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27640/22:10251724 RIV/61989100:27740/22:10251724

Výsledek na webu

<a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12502/2664204/Spin-lasers-with-periodic-gratings-toward-ultrafast-polarization-modulation/10.1117/12.2664204.short" target="_blank" >https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12502/2664204/Spin-lasers-with-periodic-gratings-toward-ultrafast-polarization-modulation/10.1117/12.2664204.short</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2664204" target="_blank" >10.1117/12.2664204</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spin-lasers with periodic gratings: Toward ultrafast polarization modulation

Popis výsledku v původním jazyce

The main goal of this study is to explore possibilities of using cavities with dielectric or semiconductor grating as a main building block of spin-injected vertical-cavity surface-emitting lasers (spin-VCSELs) for ultrafast data transfer up to hundreds of Gb/s. Spin-VCSELs allow direct control of emitted polarization by means of electron spin injection. Compared to intensity-modulated VCSELs, the information is encoded into polarization state of light. Shorter response time is offered as a result of introducing anisotropy, in this case via periodic grating, which couples circularly-polarized photons, emitted in spin-polarized quantum wells. Precise modeling of the lasing regime is essential and based upon theory developed in our previous work. Eigenmodes of cavity with periodic structures are extracted using effective medium theory implemented in the transfer matrix formalism. Mathematical tools allow us to calculate optimal parameters of birefringent grating and consequently to design the cavities with required functionality. Particular focus is put on calculation of photon lifetimes, generalized confinement factors and frequencies of eigenmodes, which are necessary for studying dynamical performance of grating-based spin-VCSELs. According to the numerical model, desired gratings and grating-based cavities can be fabricated using PVD deposition of dielectric material sophisticated by lithographic techniques along with sample etching. (C) 2022 SPIE.

Název v anglickém jazyce

Spin-lasers with periodic gratings: Toward ultrafast polarization modulation

Popis výsledku anglicky

The main goal of this study is to explore possibilities of using cavities with dielectric or semiconductor grating as a main building block of spin-injected vertical-cavity surface-emitting lasers (spin-VCSELs) for ultrafast data transfer up to hundreds of Gb/s. Spin-VCSELs allow direct control of emitted polarization by means of electron spin injection. Compared to intensity-modulated VCSELs, the information is encoded into polarization state of light. Shorter response time is offered as a result of introducing anisotropy, in this case via periodic grating, which couples circularly-polarized photons, emitted in spin-polarized quantum wells. Precise modeling of the lasing regime is essential and based upon theory developed in our previous work. Eigenmodes of cavity with periodic structures are extracted using effective medium theory implemented in the transfer matrix formalism. Mathematical tools allow us to calculate optimal parameters of birefringent grating and consequently to design the cavities with required functionality. Particular focus is put on calculation of photon lifetimes, generalized confinement factors and frequencies of eigenmodes, which are necessary for studying dynamical performance of grating-based spin-VCSELs. According to the numerical model, desired gratings and grating-based cavities can be fabricated using PVD deposition of dielectric material sophisticated by lithographic techniques along with sample etching. (C) 2022 SPIE.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of SPIE - The International Society for Optical Engineering. Volume 12502

ISBN

978-1-5106-6111-0

ISSN

0277-786X

e-ISSN

1996-756X

Počet stran výsledku

5

Strana od-do

—

Název nakladatele

SPIE - The International Society for Optical Engineering

Místo vydání

Bellingham

Místo konání akce

Wojanów

Datum konání akce

6. 9. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000920988700015