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10 October 2003 640x512 pixel narrowband, multiband, and broadband LWIR QWIP focal plane arrays
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Abstract
A 640x512 pixel, long-wavelength cutoff, narrow-band (Δλ/λ~10%) quantum well infrared photodetector (QWIP) focal plane array (FPA), a four-band QWIP FPA in 4-16 μm spectral region, and a broad-band (Δλ/λ~42%) QWIP FPA having 15.4 μm cutoff have been demonstrated. In this paper we discuss the detector designs, dark currents, quantum efficiencies, responsivities, detectivities, noise equivalent differential temperatures (NEDTs), the effect of FPA nonuniformity on performance, and the operabilities of these QWIP FPAs. In addition, we discuss the development of a very sensitive (NEDT~10.6 mK) 640x512 pixel thermal imaging camera having 9 μm cutoff.
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Sarath D. Gunapala, Sumith V. Bandara, J. K. Liu, Sir B. Rafol, and Jason M. Mumolo "640x512 pixel narrowband, multiband, and broadband LWIR QWIP focal plane arrays", Proc. SPIE 5074, Infrared Technology and Applications XXIX, (10 October 2003); https://doi.org/10.1117/12.498137
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