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Proceedings Paper

HOT MWIR InAs/InAsSb T2SL discrete photodetector development
Author(s): Jongwoo Kim; Henry Yuan; Joe Kimchi; JihFen Lei; Elizabeth Rangel; Peter Dreiske; Amal Ikhlassi
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Paper Abstract

Teledyne Judson Technologies (TJT) has developed high operating temperature (HOT) mid-wavelength infrared (MWIR) photodetectors based on InAs/InAsSb type-II superlattice (T2SL) with an electron barrier. Large area discrete detectors of 0.25mm and 1mm diameters were designed and fabricated for front-side illumination. Comprehensive E-O characterization was performed at room temperature and thermo-electric cooled (TEC) temperatures. The unique fabrication process was developed for a quasi-planar structure, enabling simplified fabrication for low-cost large volume production. The detector shows a 50% cut-off wavelength of ~5.5μm at room temperature. Peak responsivity of 2.47 A/W was achieved on 1mm detectors at peak wavelength ~ 4.24μm, -0.3V bias and 295K. Peak quantum efficiency (QE) was 72% with an antireflection coating. The 1mm detectors showed peak detectivity (D*) of 1.9x109 cm-√Hz/W at -0.3V bias, 295K and 10 kHz. Dark current density as low as 1.17 A/cm2 was achieved at -0.3V bias and 295K on 1mm detectors. The dark current was diffusion-limited at higher temperatures above ~120K while it was dominated by either tunneling or surface leakage currents at lower temperatures. Similar results were obtained on 0.25mm detectors.

Paper Details

Date Published: 15 May 2018
PDF: 8 pages
Proc. SPIE 10624, Infrared Technology and Applications XLIV, 1062412 (15 May 2018); doi: 10.1117/12.2303973
Show Author Affiliations
Jongwoo Kim, Teledyne Judson Technologies (United States)
Henry Yuan, Teledyne Judson Technologies (United States)
Joe Kimchi, Teledyne Judson Technologies (United States)
JihFen Lei, Teledyne Judson Technologies (United States)
Elizabeth Rangel, Teledyne Imaging Sensors (United States)
Peter Dreiske, Teledyne Imaging Sensors (United States)
Amal Ikhlassi, Teledyne Scientific Co. (United States)

Published in SPIE Proceedings Vol. 10624:
Infrared Technology and Applications XLIV
Bjørn F. Andresen; Gabor F. Fulop; Charles M. Hanson; John Lester Miller; Paul R. Norton, Editor(s)

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