320 × 256 infrared focal plane array based on type-II InAs/GaSb superlattice with a 12-µm cutoff wavelength

Pierre-Yves Delaunay; Binh Minh Nguyen; Darin Hoffman; Manijeh Razeghi

doi:10.1117/12.723832

14 May 2007 320 × 256 infrared focal plane array based on type-II InAs/GaSb superlattice with a 12-&mgr;m cutoff wavelength

Pierre-Yves Delaunay, Binh Minh Nguyen, Darin Hoffman, Manijeh Razeghi

Author Affiliations +

Proceedings Volume 6542, Infrared Technology and Applications XXXIII; 654204 (2007) https://doi.org/10.1117/12.723832
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

In the past few years, significant progress has been made in the structure design, growth and processing of Type-II InAs/GaSb superlattice photodetectors. Type-II superlattice demonstrated its ability to perform imaging in the middle and long infra-red range, becoming a potential competitor for technologies such as QWIP and HgCdTe. Using an empirical tight-binding model, we developed a superlattice design that matches the lattice parameter of GaSb substrates and presents a cutoff wavelength of 12 &mgr;m. Electrical and optical measurements performed on single element detectors at 77 K showed an R0A averaging 13 &OHgr;.cm² and a quantum efficiency as high as 54%. We demonstrated high quality material growth with x-ray FWHM below 30 arcsec and an AFM rms roughness of 1.5 Å over an area of 20x20 &mgr;m². A 320x256 array of 25x25&mgr;m² pixels, hybridized to an Indigo Read Out Integrated Circuit, performed thermal imaging up to 185 K with an operability close to 97%. The noise equivalent temperature difference at 81 K presented a peak at 270 mK, corresponding to a mean value of 340 mK.

Citation Download Citation

Pierre-Yves Delaunay, Binh Minh Nguyen, Darin Hoffman, and Manijeh Razeghi "320 × 256 infrared focal plane array based on type-II InAs/GaSb superlattice with a 12-&mgr;m cutoff wavelength", Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 654204 (14 May 2007); https://doi.org/10.1117/12.723832

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available