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Designing graphene absorption in a multispectral plasmon-enhanced infrared detector

Journal Article · · Optics Express
DOI:https://doi.org/10.1364/oe.25.012400· OSTI ID:1360932
 [1];  [2];  [1];  [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy

Here, we have examined graphene absorption in a range of graphene-based infrared devices that combine either monolayer or bilayer graphene with three different gate dielectrics. Electromagnetic simulations show that the optical absorption in graphene in these devices, an important factor in a functional graphene-based detector, is strongly dielectric-dependent. Our simulations reveal that plasmonic excitation in graphene can significantly influence the percentage of light absorbed in the entire device, as well as the graphene layer itself, with graphene absorption exceeding 25% in regions where plasmonic excitation occurs. Notably, the dielectric environment of graphene has a dramatic influence on the strength and wavelength range over which the plasmons can be excited, making dielectric choice paramount to final detector tunability and sensitivity.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; NA0003525
OSTI ID:
1360932
Report Number(s):
SAND--2017-5294J; 653418
Journal Information:
Optics Express, Journal Name: Optics Express Journal Issue: 11 Vol. 25; ISSN 1094-4087; ISSN OPEXFF
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Tunable Infrared Devices via Ferroelectric Domain Reconfiguration journal October 2018
Tunable dual-band graphene-based infrared reflectance filter journal January 2018