Uncooled operation of type-II InAs/GaSb superlattice photodiodes in the midwavelength infrared range

Yajun Wei, Andrew Hood, Haiping Yau, Aaron Gin, Manijeh Razeghi, Meimei Z. Tidrow, Vaidya Nathan

Research output: Contribution to journalArticlepeer-review

131 Scopus citations

Abstract

We report high performance uncooled midwavelength infrared photodiodes based on interface-engineered InAsGaSb superlattice. Two distinct superlattices were designed with a cutoff wavelength around 5 μm for room temperature and 77 K. The device quantum efficiency reached more than 25% with responsivity around 1 AW. Detectivity was measured around 109 cm Hz12 W at room temperature and 1.5× 1013 cm Hz12 W at 77 K under zero bias. The devices were without antireflective coating. The device quantum efficiency stays at nearly the same level within this temperature range. Additionally, Wannier-Stark oscillations in the Zener tunneling current were observed up to room temperature.

Original languageEnglish (US)
Article number233106
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number23
DOIs
StatePublished - Jun 6 2005

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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