High operating temperature interband cascade focal plane arrays

In this paper, we report the initial demonstration of mid-infrared interband cascade (IC) photodetector focal plane arrays with multiple-stage/junction design. The merits of IC photodetectors include low noise and efficient photocarrier extraction, even for zero-bias operation. By adopting enhanced...

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Published in:Applied physics letters 2014-08, Vol.105 (5)
Main Authors: Tian, Z.-B., Godoy, S. E., Kim, H. S., Schuler-Sandy, T., Montoya, J. A., Krishna, S.
Format: Article
Language:English
Subjects:
Applied physics
Cameras
Dark current
ELECTRIC CONTACTS
ELECTRIC CURRENTS
FABRICATION
Focal plane devices
Infrared imagery
Infrared radiation
INFRARED SPECTRA
Integrated circuits
Low noise
MATERIALS SCIENCE
Noise equivalent temperature difference
Operating temperature
PHOTODETECTORS
Photometers
SEMICONDUCTOR JUNCTIONS
Temperature gradients
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cited_by cdi_FETCH-LOGICAL-c386t-310522f9dc454a7ec2c8dc82c76a2b497c020ad99dca7d894ff0b269f9cae80f3
cites cdi_FETCH-LOGICAL-c386t-310522f9dc454a7ec2c8dc82c76a2b497c020ad99dca7d894ff0b269f9cae80f3
container_end_page
container_issue 5
container_start_page
container_title Applied physics letters
container_volume 105
creator Tian, Z.-B.
Godoy, S. E.
Kim, H. S.
Schuler-Sandy, T.
Montoya, J. A.
Krishna, S.
description In this paper, we report the initial demonstration of mid-infrared interband cascade (IC) photodetector focal plane arrays with multiple-stage/junction design. The merits of IC photodetectors include low noise and efficient photocarrier extraction, even for zero-bias operation. By adopting enhanced electron barrier design and a total absorber thickness of 0.7 μm, the 5-stage IC detectors show very low dark current (1.10 × 10−7 A/cm2 at −5 mV and 150 K). Even with un-optimized fabrication and standard commercial (mis-matched) read-out circuit technology, infrared images are obtained by the 320 × 256 IC focal plane array up to 180 K with f/2.3 optics. The minimum noise equivalent temperature difference of 28 mK is obtained at 120 K. These initial results indicate great potential of IC photodetectors, particularly for high operating temperature applications.
doi_str_mv 10.1063/1.4892634
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subjects Applied physics
Cameras
Dark current
ELECTRIC CONTACTS
ELECTRIC CURRENTS
FABRICATION
Focal plane devices
Infrared imagery
Infrared radiation
INFRARED SPECTRA
Integrated circuits
Low noise
MATERIALS SCIENCE
Noise equivalent temperature difference
Operating temperature
PHOTODETECTORS
Photometers
SEMICONDUCTOR JUNCTIONS
Temperature gradients
title High operating temperature interband cascade focal plane arrays
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