Electrically tunable damping of plasmonic resonances with graphene

Naresh K. Emani; Ting Fung Chung; Xingjie Ni; Alexander V. Kildishev; Yong P. Chen; Alexandra Boltasseva

doi:10.1021/nl302322t

Electrically tunable damping of plasmonic resonances with graphene

Naresh K. Emani, Ting Fung Chung, Xingjie Ni, Alexander V. Kildishev, Yong P. Chen, Alexandra Boltasseva

Research output: Contribution to journal › Article › peer-review

299 Citations (SciVal)

Abstract

Dynamic switching of a plasmonic resonance may find numerous applications in subwavelength optoelectronics, spectroscopy, and sensing. Graphene shows a highly tunable carrier concentration under electrostatic gating, and this could provide an effective route to achieving electrical control of the plasmonic resonance. In this Letter, we demonstrate electrical control of a plasmonic resonance at infrared frequencies using large-area graphene. Plasmonic structures fabricated on graphene enhance the interaction of the incident optical field with the graphene sheet, and the impact of graphene is much stronger at mid-infrared wavelengths. Full-wave simulations, where graphene is modeled as a 1 nm thick effective medium, show excellent agreement with experimental results.

Original language	English (US)
Pages (from-to)	5202-5206
Number of pages	5
Journal	Nano letters
Volume	12
Issue number	10
DOIs	https://doi.org/10.1021/nl302322t
State	Published - Oct 10 2012

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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AU - Ni, Xingjie

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AU - Chen, Yong P.

AU - Boltasseva, Alexandra

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AB - Dynamic switching of a plasmonic resonance may find numerous applications in subwavelength optoelectronics, spectroscopy, and sensing. Graphene shows a highly tunable carrier concentration under electrostatic gating, and this could provide an effective route to achieving electrical control of the plasmonic resonance. In this Letter, we demonstrate electrical control of a plasmonic resonance at infrared frequencies using large-area graphene. Plasmonic structures fabricated on graphene enhance the interaction of the incident optical field with the graphene sheet, and the impact of graphene is much stronger at mid-infrared wavelengths. Full-wave simulations, where graphene is modeled as a 1 nm thick effective medium, show excellent agreement with experimental results.

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Electrically tunable damping of plasmonic resonances with graphene

Abstract

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