@inproceedings{e1881a07005549cf9c57bcf3af8a2173,
title = "Optimization of corrugated-QWIPs for large format, high quantum efficiency, and multi-color FPAs",
abstract = "Previously, we demonstrated a large format 1024 × 1024 corrugated quantum well infrared photodetector focal plane array (C-QWIP FPA). The FPA has a cutoff at 8.6 μm and is BLIP at 76 K with f/1.8 optics. The pixel had a shallow trapezoidal geometry that simplified processing but limited the quantum efficiency QE. In this paper, we will present two approaches to achieve a larger QE for the C-QWIPs. The first approach increases the size of the corrugations for more active volume and adopts a nearly triangular pixel geometry for larger light reflecting surfaces. With these improvements, QE is predicted to be about 35% for a pair of inclined sidewalk, which is more than twice the previous value. The second approach is to use Fabry-Perot resonant oscillations inside the corrugated cavities to enhance the vertical electric field strength. With this approach, a larger QE of 50% can be achieved within certain spectral regions without using either very thick active layers or anti-reflection coatings. The former approach has been adopted to produce a series single color FPAs, and the experimental results will be discussed in a companion paper. In this paper, we also describe using voltage tunable detector materials to achieve multi-color capability for these FPAs.",
keywords = "EM modeling, FPA, Optical coupling, QWIP",
author = "Choi, {Kwong Kit} and Carlos Monroy and Venkataraman Swaminathan and Theodor Tamir and Ming Leung and John Devitt and David Forrai and Darrel Endres",
year = "2006",
doi = "10.1117/12.663960",
language = "English (US)",
isbn = "0819462624",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Infrared Technology and Applications XXXII",
note = "Infrared Technology and Applications XXXII ; Conference date: 17-04-2006 Through 21-04-2006",
}