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Enhanced light-matter interactions in size tunable graphene–gold nanomesh

Published online by Cambridge University Press:  20 December 2019

Vivek Garg
Affiliation:
IITB-Monash Research Academy, Indian Institute of Technology Bombay, Mumbai400076, IndiaDepartment of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai400076, IndiaDepartment of Mechanical and Aerospace Engineering, Monash University, Melbourne3800, Australia
Bhaveshkumar Kamaliya
Affiliation:
IITB-Monash Research Academy, Indian Institute of Technology Bombay, Mumbai400076, IndiaDepartment of Mechanical and Aerospace Engineering, Monash University, Melbourne3800, AustraliaDepartment of Physics, Indian Institute of Technology Bombay, Mumbai400076, India
Rakesh G. Mote*
Affiliation:
Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai400076, India
Jing Fu
Affiliation:
Department of Mechanical and Aerospace Engineering, Monash University, Melbourne3800, Australia
*
Address all correspondence to Rakesh G. Mote at rakesh.mote@iitb.ac.in
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Abstract

A hybrid graphene–gold nanomesh, realized through Au deposition on a patterned graphene nanomesh with a focused ion beam, is introduced and illustrated for enhanced light absorption in the visible spectrum. Numerical studies reveal that the hybrid nanomesh with dual resonances in the visible spectrum exhibit ~50% light absorption and enhancement factor as high as ~1 × 108. The simulations also show that the enhanced optical absorption is associated with the excitation of surface plasmons. This is confirmed through the localization of electric fields at the resonant wavelengths. Such a hybrid graphene–gold nanomesh exhibiting enhanced light-matter interactions paves the way toward plasmonics, surface-enhanced Raman scattering applications, etc.

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Type
Research Letters
Copyright
Copyright © Materials Research Society 2019

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