Momentum (k)-Space Charge Separation Mid-Wave Infrared Photodetectors Using SiGeSn Alloys

Tyler T. McCarthy, Zheng Ju, Shui Qing Yu, Yong Hang Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report a band-structure engineering approach with k-space charge-separation feature by tailoring the direct-energy valley to be several kBT higher than the indirect, enabling large absorption coefficients while maintaining long-carrier lifetimes. Modeling shows SiGeSn alloys with constant 3kBT Γ- and L-valley separation cover MWIR range.

Original languageEnglish (US)
Title of host publication2021 IEEE Photonics Society Summer Topicals Meeting Series, SUM 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665416009
DOIs
StatePublished - 2021
Externally publishedYes
Event2021 IEEE Photonics Society Summer Topicals Meeting Series, SUM 2021 - Virtual, Online, Mexico
Duration: Jul 19 2021Jul 21 2021

Publication series

NameLEOS Summer Topical Meeting
Volume2021-July
ISSN (Print)1099-4742

Conference

Conference2021 IEEE Photonics Society Summer Topicals Meeting Series, SUM 2021
Country/TerritoryMexico
CityVirtual, Online
Period7/19/217/21/21

Keywords

  • Band-structure engineering
  • Charge separation
  • MWIR
  • Photodetector
  • SiGeSn

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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