4 February 2013 Multi-color QWIP FPAs for hyperspectral thermal emission instruments
Author Affiliations +
Abstract
Infrared focal plane arrays (FPAs) covering broad mid- and long-IR spectral ranges are the central parts of the spectroscopic and imaging instruments in several Earth and planetary science missions. To be implemented in the space instrument these FPAs need to be large-format, uniform, reproducible, low-cost, low 1/f noise, and radiation hard. Quantum Well Infrared Photodetectors (QWIPs), which possess all needed characteristics, have a great potential for implementation in the space instruments. However a standard QWIP has only a relatively narrow spectral coverage. A multi-color QWIP, which is compromised of two or more detector stacks, can to be used to cover the broad spectral range of interest. We will discuss our recent work on development of multi-color QWIP for Hyperspectral Thermal Emission Spectrometer instruments. We developed QWIP compromising of two stacks centered at 9 and 10.5 μm, and featuring 9 grating regions optimized to maximize the responsivity in the individual subbands across the 7.5-12 μm spectral range. The demonstrated 1024x1024 QWIP FPA exhibited excellent performance with operability exceeding 99% and noise equivalent differential temperature of less than 15 mK across the entire 7.5-12 μm spectral range.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexander Soibel, Ed Luong, Jason M. Mumolo, John Liu, Sir B. Rafol, Sam A. Keo, William Johnson, Dan Willson, Cory J. Hill, David Z.-Y. Ting, Sarath D. Gunapala, "Multi-color QWIP FPAs for hyperspectral thermal emission instruments", Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86310R (4 February 2013); doi: 10.1117/12.2003323; https://doi.org/10.1117/12.2003323
PROCEEDINGS
7 PAGES


SHARE
Back to Top