TY - GEN
T1 - Tunability of optical absorption in a heterostructure with an embedded graphene sliver
AU - Rakheja, S.
AU - Sengupta, P.
N1 - Publisher Copyright:
© 2015 IEEE.
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
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U2 - 10.1109/DRC.2015.7175596
DO - 10.1109/DRC.2015.7175596
M3 - Conference contribution
AN - SCOPUS:84957626098
T3 - Device Research Conference - Conference Digest, DRC
SP - 143
EP - 144
BT - 73rd Annual Device Research Conference, DRC 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 73rd Annual Device Research Conference, DRC 2015
Y2 - 21 June 2015 through 24 June 2015
ER -