Abstract
We report a high performance long-wavelength IR dual-band imager based on type-II superlattices with 100% cutoff wavelengths at (blue channel) and (red channel). Test pixels reveal background-limited behavior with specific detectivities as high as Jones at in the blue channel and Jones at in the red channel at . These performances were attributed to low dark currents thanks to the M-barrier and Fabry–Perot enhanced quantum efficiencies despite using thin absorbing regions. In the imager, the high signal-to-noise ratio contributed to median noise equivalent temperature differences of milli-Kelvin for both channels with integration times on the order of 0.5 ms, making it suitable for high speed applications.
© 2011 Optical Society of America
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