Enhanced graphene absorption and linewidth sharpening enabled by Fano-like geometric resonance at near-infrared wavelengths | Zendy

Feng Liu | Zendy; L. Chen | Zendy; Qiushi Guo | Zendy; J. Chen | Zendy; X. Zhao | Zendy; W. Shi | Zendy

Open Access

Enhanced graphene absorption and linewidth sharpening enabled by Fano-like geometric resonance at near-infrared wavelengths

Author(s) -

Feng Liu,

L. Chen,

Qiushi Guo,

J. Chen,

X. Zhao,

W. Shi

Publication year - 2015

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.23.021097

Subject(s) - laser linewidth , graphene , fano resonance , materials science , optics , optoelectronics , resonance (particle physics) , infrared , wavelength , guided mode resonance , absorption (acoustics) , photodetector , plasmon , physics , nanotechnology , laser , atomic physics , diffraction grating

We theoretically investigate the light-graphene interactions enabled by a single layer of nonlossy nanorods at near-infrared wavelengths. The sustained Fano-like geometric resonance gives rise to enhanced graphene absorption, e.g., 100%, and adjustable absorption linewidth even to be ultra-narrow, e.g., < 1 nm. The conditions for such graphene absorption enhancement and linewidth sharpening are analytically interpreted within the framework of temporal coupled mode theory for the Fano resonance. The geometric resonance enhanced light-graphene interactions are polarization-sensitive and angle-dependent. Our study offers new possibilities towards designing and fabricating novel opto-electronic devices such as graphene-integrated monochromatic photodetectors and ultra-compact modulators.

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