Type II superlattice infrared detector and focal plane arrays

Vaidya Nathan; Manijeh Razeghi

doi:10.1117/12.723730

14 May 2007 Type II superlattice infrared detector and focal plane arrays

Vaidya Nathan, Manijeh Razeghi

Proceedings Volume 6542, Infrared Technology and Applications XXXIII; 654209 (2007) https://doi.org/10.1117/12.723730
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

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.

Citation Download Citation

Vaidya Nathan and Manijeh Razeghi "Type II superlattice infrared detector and focal plane arrays", Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 654209 (14 May 2007); https://doi.org/10.1117/12.723730

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