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Monolithically-Fabricated Tunable Long-Wave Infrared Detectors Based on Dynamic Graphene Metasurfaces.

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/5.0007780· OSTI ID:1634796
 [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [3];  [1];  [1];  [1];  [4]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Naval Surface Warfare Center (NSWC), Crane, IN (United States)
  3. Air Force Research Lab. (AFRL), Kirtland AFB (United States). Space Vehicles Directorate
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Center for Integrated Technologies, Albuquerque, NM (United States)
+ Show Author Affiliations
In this paper, the design, fabrication, and characterization of an actively tunable long-wave infrared detector, made possible through direct integration of a graphene-enabled metasurface with a conventional type-II superlattice infrared detector, are reported. This structure allows for post-fabrication tuning of the detector spectral response through voltage-induced modification of the carrier density within graphene and, therefore, its plasmonic response. These changes modify the transmittance through the metasurface, which is fabricated monolithically atop the detector, allowing for spectral control of light reaching the detector. Importantly, this structure provides a fabrication-controlled alignment of the metasurface filter to the detector pixel and is entirely solid-state. Using single pixel devices, relative changes in the spectral response exceeding 8% have been realized. These proof-of-concept devices present a path toward solid-state hyperspectral imaging with independent pixel-to-pixel spectral control through a voltage-actuated dynamic response.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; NA0003525
OSTI ID:
1634796
Alternate ID(s):
OSTI ID: 1617986
Report Number(s):
SAND--2020-5506J; 686344
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 19 Vol. 116; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

47 OTHER INSTRUMENTATION
electromagnetic radiation detectors
graphene
hyperspectral imaging
metamaterials
photodetectors
plasmonics
superlattices