Share Email Print
cover

Proceedings Paper

Optimizing electron-photon coupling in quantum well infrared photodetectors
Author(s): Ying Fu; Magnus Willander; Wei Lu; W. L. Xu; Ning Li; Na Li; Shuechu Shen
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

Because of the isotropic energy band structure of the (Gamma) electrons in GaAs/AlGaAs quantum well infrared photodetector (QWIP), normal incident radiation absorption is not possible so that the optical grating and its optimization become key requirements for the QWIPs. In this work we study the optical grating structure based on Huygen's principle and Kirchhoff's formula. The theory developed in this paper is used to design the optical grating for our GaAs/AlGaAs QWIPs with responding wavelength around 8.0 micrometer. The result for the photoconductive QWIPs of 1 X 128 focal plane array (FPA) working at 80 K is presented. The theoretical model has also been used to design the grating size for the 64 X 64 FPA which results in a good FPA device performance around 8.0 micrometer.

Paper Details

Date Published: 7 April 1999
PDF: 7 pages
Proc. SPIE 3629, Photodetectors: Materials and Devices IV, (7 April 1999); doi: 10.1117/12.344592
Show Author Affiliations
Ying Fu, Univ. of Goteborg and Chalmers Univ. of Technology (Sweden)
Magnus Willander, Univ. of Goteborg and Chalmers Univ. of Technology (Sweden)
Wei Lu, Shanghai Institute of Technical Physics (China)
W. L. Xu, Shanghai Institute of Technical Physics (China)
Ning Li, Shanghai Institute of Technical Physics (China)
Na Li, Shanghai Institute of Technical Physics (China)
Shuechu Shen, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 3629:
Photodetectors: Materials and Devices IV
Gail J. Brown; Manijeh Razeghi, Editor(s)

© SPIE. Terms of Use
Back to Top