Tunability of optical absorption in a heterostructure with an embedded graphene sliver

Shaloo Rakheja, P. Sengupta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A key design component of optical instruments employed in diverse roles such as detectors, optical resonators, and thermal-imaging cameras is enhancement of the optical absorption. The efficiency of absorption in conventional thin metallic films can be further improved by replacing them with graphene detectors. While graphene exhibits a high absorption and quantum efficiency for light-matter interactions [1-2], the optical absorption of single-atom layer graphene is poor to be an efficient photo-detector [3]. Its adaptability for various frequency ranges is also limited by a flat absorption spectrum in the visible to near-infrared region. In this work, using a transfer matrix approach [4], we present methods to enhance the optical absorption in a graphene sliver sandwiched between dielectric media via adjustments to the thickness of the dielectrics, incident angle and wavelength of the EM wave, and chemical potential of the graphene layer. The model equations are presented in Table I.

Original languageEnglish (US)
Title of host publication73rd Annual Device Research Conference, DRC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages143-144
Number of pages2
Volume2015-August
ISBN (Print)9781467381345
DOIs
StatePublished - Aug 3 2015
Event73rd Annual Device Research Conference, DRC 2015 - Columbus, United States
Duration: Jun 21 2015Jun 24 2015

Other

Other73rd Annual Device Research Conference, DRC 2015
CountryUnited States
CityColumbus
Period6/21/156/24/15

Fingerprint

Graphene
Light absorption
Heterojunctions
Detectors
Optical resonators
Optical instruments
Metallic films
Chemical potential
Infrared imaging
Quantum efficiency
Electromagnetic waves
Absorption spectra
Cameras
Infrared radiation
Thin films
Wavelength
Atoms

Keywords

  • Absorption
  • Conductivity
  • Dielectrics
  • Graphene
  • Optical films
  • Optical polarization
  • Optical resonators

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Rakheja, S., & Sengupta, P. (2015). Tunability of optical absorption in a heterostructure with an embedded graphene sliver. In 73rd Annual Device Research Conference, DRC 2015 (Vol. 2015-August, pp. 143-144). [7175596] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/DRC.2015.7175596

Tunability of optical absorption in a heterostructure with an embedded graphene sliver. / Rakheja, Shaloo; Sengupta, P.

73rd Annual Device Research Conference, DRC 2015. Vol. 2015-August Institute of Electrical and Electronics Engineers Inc., 2015. p. 143-144 7175596.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Rakheja, S & Sengupta, P 2015, Tunability of optical absorption in a heterostructure with an embedded graphene sliver. in 73rd Annual Device Research Conference, DRC 2015. vol. 2015-August, 7175596, Institute of Electrical and Electronics Engineers Inc., pp. 143-144, 73rd Annual Device Research Conference, DRC 2015, Columbus, United States, 6/21/15. https://doi.org/10.1109/DRC.2015.7175596
Rakheja S, Sengupta P. Tunability of optical absorption in a heterostructure with an embedded graphene sliver. In 73rd Annual Device Research Conference, DRC 2015. Vol. 2015-August. Institute of Electrical and Electronics Engineers Inc. 2015. p. 143-144. 7175596 https://doi.org/10.1109/DRC.2015.7175596
Rakheja, Shaloo ; Sengupta, P. / Tunability of optical absorption in a heterostructure with an embedded graphene sliver. 73rd Annual Device Research Conference, DRC 2015. Vol. 2015-August Institute of Electrical and Electronics Engineers Inc., 2015. pp. 143-144
@inproceedings{9723dffbb1634bc4888b4b6b835dee3f,
title = "Tunability of optical absorption in a heterostructure with an embedded graphene sliver",
abstract = "A key design component of optical instruments employed in diverse roles such as detectors, optical resonators, and thermal-imaging cameras is enhancement of the optical absorption. The efficiency of absorption in conventional thin metallic films can be further improved by replacing them with graphene detectors. While graphene exhibits a high absorption and quantum efficiency for light-matter interactions [1-2], the optical absorption of single-atom layer graphene is poor to be an efficient photo-detector [3]. Its adaptability for various frequency ranges is also limited by a flat absorption spectrum in the visible to near-infrared region. In this work, using a transfer matrix approach [4], we present methods to enhance the optical absorption in a graphene sliver sandwiched between dielectric media via adjustments to the thickness of the dielectrics, incident angle and wavelength of the EM wave, and chemical potential of the graphene layer. The model equations are presented in Table I.",
keywords = "Absorption, Conductivity, Dielectrics, Graphene, Optical films, Optical polarization, Optical resonators",
author = "Shaloo Rakheja and P. Sengupta",
year = "2015",
month = "8",
day = "3",
doi = "10.1109/DRC.2015.7175596",
language = "English (US)",
isbn = "9781467381345",
volume = "2015-August",
pages = "143--144",
booktitle = "73rd Annual Device Research Conference, DRC 2015",
publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

TY - GEN

T1 - Tunability of optical absorption in a heterostructure with an embedded graphene sliver

AU - Rakheja, Shaloo

AU - Sengupta, P.

PY - 2015/8/3

Y1 - 2015/8/3

N2 - A key design component of optical instruments employed in diverse roles such as detectors, optical resonators, and thermal-imaging cameras is enhancement of the optical absorption. The efficiency of absorption in conventional thin metallic films can be further improved by replacing them with graphene detectors. While graphene exhibits a high absorption and quantum efficiency for light-matter interactions [1-2], the optical absorption of single-atom layer graphene is poor to be an efficient photo-detector [3]. Its adaptability for various frequency ranges is also limited by a flat absorption spectrum in the visible to near-infrared region. In this work, using a transfer matrix approach [4], we present methods to enhance the optical absorption in a graphene sliver sandwiched between dielectric media via adjustments to the thickness of the dielectrics, incident angle and wavelength of the EM wave, and chemical potential of the graphene layer. The model equations are presented in Table I.

AB - A key design component of optical instruments employed in diverse roles such as detectors, optical resonators, and thermal-imaging cameras is enhancement of the optical absorption. The efficiency of absorption in conventional thin metallic films can be further improved by replacing them with graphene detectors. While graphene exhibits a high absorption and quantum efficiency for light-matter interactions [1-2], the optical absorption of single-atom layer graphene is poor to be an efficient photo-detector [3]. Its adaptability for various frequency ranges is also limited by a flat absorption spectrum in the visible to near-infrared region. In this work, using a transfer matrix approach [4], we present methods to enhance the optical absorption in a graphene sliver sandwiched between dielectric media via adjustments to the thickness of the dielectrics, incident angle and wavelength of the EM wave, and chemical potential of the graphene layer. The model equations are presented in Table I.

KW - Absorption

KW - Conductivity

KW - Dielectrics

KW - Graphene

KW - Optical films

KW - Optical polarization

KW - Optical resonators

UR - http://www.scopus.com/inward/record.url?scp=84957626098&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84957626098&partnerID=8YFLogxK

U2 - 10.1109/DRC.2015.7175596

DO - 10.1109/DRC.2015.7175596

M3 - Conference contribution

AN - SCOPUS:84957626098

SN - 9781467381345

VL - 2015-August

SP - 143

EP - 144

BT - 73rd Annual Device Research Conference, DRC 2015

PB - Institute of Electrical and Electronics Engineers Inc.

ER -