New resonant cavity-enhanced absorber structures for mid-infrared detector applications

Moshe Zohar, Mark Auslender, Lorenzo Faraone, Shlomo Hava

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

A new dielectric Fabry-Perot cavity was designed for a resonant enhancing optical absorption by a thin absorber layer embedded into the cavity. In this cavity, the front mirror is a subwavelength grating with - 100% retroreflection. For a HgCdTe absorber in a matching cavity of the new type, the design is shown to meet the combined challenges of increasing the absorbing efficiency of the entire device up to - 100% and reducing its size and overall complexity, compared to a conventional resonant cavity enhanced HgCdTe absorber, while maintaining a fairly good tolerance against the grating's fabrication errors.

Original languageEnglish
Pages (from-to)95-102
Number of pages8
JournalOptical and Quantum Electronics
Volume44
Issue number3-5
DOIs
StatePublished - 1 Jun 2012

Keywords

  • Gratings
  • HgCdTe
  • Optical resonant cavity
  • Photodetectors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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