Enhanced corrugated QWIP performance using dielectric coverage |
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Authors: | Das NC Choi KK |
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Affiliation: | Raytheon/STX, Lanham, MD; |
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Abstract: | We report here the effect of dielectric/metal coverage on the performance of the corrugated quantum well infrared photodetectors (C-QWIP) in two wavelength regimes. We found that with proper dielectrics, both the detector dark current and the spectral responsivity can he improved upon the monitoring 45° edge coupled QWIP. In the 8 μm regime, the normalized responsivity of a Si3 N4 covered C-QWIP was found to be improved by 3.3 times. In the 14 μm regime, the improvement is a factor of 1.8 using Si3N4 coverage and a factor of 2.5 using SiO2 coverage |
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