Type II superlattice infrared detectors and focal plane arrays

Vaidya Nathan*, Manijeh Razeghi

*Corresponding author for this work

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

5 Scopus citations

Abstract

Type II superlattce photodetectors have recently experienced significant improvements in both theoretical structure design and experimental realization. Empirical Tight Binding Method is initiated and developed for Type II superlattice. Growth characteristics such as group V segregation and incorporation phenomena are taken into account in the model and shown higher precision. A new Type II structure, called M-structure, is introduced and theoretically demonstrated high RoA, high quantum efficiency. Device design is optimized to improve the performance. As a result, 55% quantum efficiency and 10 Ohm.cm 2 RoA are achieved for an 11.7 μm cut-off photodetector at 77K. FPA imaging at longwavelength is demonstrated with a capability of imaging up to 171K. At 81K, the noise equivalent temperature difference presented a peak at 0.33K.

Original languageEnglish (US)
Title of host publicationInfrared Technology and Applications XXXIII
Volume6542
EditionI
DOIs
StatePublished - Nov 5 2007
EventInfrared Technology and Applications XXXIII - Orlando, FL, United States
Duration: Apr 9 2007Apr 13 2007

Other

OtherInfrared Technology and Applications XXXIII
CountryUnited States
CityOrlando, FL
Period4/9/074/13/07

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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