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Proceedings Paper

Initial testing of a Si:As blocked-impurity-band (BIB) trap detector
Author(s): Solomon I. Woods; Simon G. Kaplan; Timothy M. Jung; Adriaan C. Carter; James E. Proctor
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Paper Abstract

We discuss the design, construction, and initial test results of a Si:As blocked-impurity-band (BIB) trap detector. The trap consists of two rectangular BIB devices configured in a v-shaped geometry. This trapping geometry is designed to ideally yield a minimum of 7 bounces before exit for incident light within an f/4 cone with 3 mm clear aperture. The individual BIB devices consist of 70 μm thick active layers with As doping near 1.7×1018 cm-3, and have dark currents of approximately 100 nA at an operating temperature of 9 K. A simple ray-tracing model of the trap, along with data on the quantum yield of typical BIB detector elements, indicates that it is possible to achieve an external quantum efficiency of > 0.99 over the 4 μm to 28 μm spectral range and significant suppression of the etalon fringes present in the spectral responsivity of a single element. We have made initial responsivity measurements of the trap compared to a calibrated 5 mm diameter pyroelectric detector over the 3 μm to 17 μm spectral range using the fiber-coupled output of a Fourier-transform spectrometer. We also discuss the results of comparison measurements between the trap detector and an absolute cryogenic radiometer viewing the output of a calibrated blackbody source at discrete filter bands from 5 μm to 11 μ. In initial testing the performance of the trap is limited by the poor performance of the individual BIB detectors, but the advantages of boosted quantum efficiency and suppressed etalon are realized by the trap.

Paper Details

Date Published: 31 May 2012
PDF: 9 pages
Proc. SPIE 8353, Infrared Technology and Applications XXXVIII, 83533G (31 May 2012); doi: 10.1117/12.919563
Show Author Affiliations
Solomon I. Woods, National Institute of Standards and Technology (United States)
Simon G. Kaplan, National Institute of Standards and Technology (United States)
Timothy M. Jung, Jung Research and Development Corp. (United States)
Adriaan C. Carter, Booz Allen Hamilton Inc. (United States)
James E. Proctor, Jeptech Inc. (United States)

Published in SPIE Proceedings Vol. 8353:
Infrared Technology and Applications XXXVIII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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