Share Email Print
cover

Proceedings Paper

Type II superlattice infrared detector and focal plane arrays
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper 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.cm2 RoA are achieved for an 11.7 &mgr;m 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.

Paper Details

Date Published: 14 May 2007
PDF: 11 pages
Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 654209 (14 May 2007); doi: 10.1117/12.723730
Show Author Affiliations
Vaidya Nathan, Air Force Research Lab. (United States)
Manijeh Razeghi, Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 6542:
Infrared Technology and Applications XXXIII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

© SPIE. Terms of Use
Back to Top