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Title: Enhanced infrared detectors using resonant structures combined with thin type-II superlattice absorbers

Journal Article · · Applied Physics Letters
DOI: https://doi.org/10.1063/1.4972844 · OSTI ID:1338404

Here we examined the spectral responsivity of a 1.77μm thick type-II superlattice based long-wave infrared detector in combination with metallic nanoantennas. Coupling between the Fabry-Pérot cavity formed by the semiconductor layer and the resonant nanoantennas on its surface enables spectral selectivity, while also increasing peak quantum efficiency to over 50%. Electromagnetic simulations reveal that this high responsivity is a direct result of field-enhancement in the absorber layer, enabling significant absorption in spite of the absorber’s subwavelength thickness. Notably, thinning of the absorbing material could ultimately yield lower photodetector noise through a reduction in dark current while improving photocarrier collection efficiency. The temperature- and incident-angle-independent spectral response observed in these devices allows for operation over a wide range of temperatures and optical systems. This detector paradigm demonstrates potential benefits to device performance with applications throughout the infrared.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1338404
Report Number(s):
SAND2016-12919J; 650117
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 25 Vol. 109; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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  • Haugan, Heather J.; Brown, Gail J.; Olson, Benjamin V.
  • Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, Vol. 34, Issue 2 https://doi.org/10.1116/1.4941132
journal March 2016
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Cited By (4)

Tunable Infrared Devices via Ferroelectric Domain Reconfiguration journal October 2018
Ultra-thin enhanced-absorption long-wave infrared detectors journal February 2018
Improved quantitative circuit model of realistic patch-based nanoantenna-enabled detectors journal January 2018
Ultra-broadband absorber from visible to near-infrared using plasmonic metamaterial journal January 2018

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