Electrically Tunable Damping of Plasmonic Resonances with Graphene

Author

• Naresh K. Emani, Birck Nanotechnology Center, Purdue UniversityFollow
• Ting-Fung Chung, Birck Nanotechnology Center, Purdue UniversityFollow
• Xingjie Ni, Birck Nanotechnology Center, Purdue UniversityFollow
• Alexander V. Kildishev, Birck Nanotechnology Center, Purdue UniversityFollow
• Yong P. Chen, Birck Nanotechnology Center, Purdue UniversityFollow
• Alexandra Boltasseva, Birck Nanotechnology Center, Purdue University; Technical University of DenmarkFollow

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.

Keywords

Graphene; plasmonics; tunable resonances; interband losses; METAMATERIALS; OPTICS

DOI

10.1021/nl302322t

Citation

Nano Lett., 2012, 12 (10), pp 5202–5206 DOI: 10.1021/nl302322t

Date of this Version

10-2012

Recommended Citation

Emani, Naresh K.; Chung, Ting-Fung; Ni, Xingjie; Kildishev, Alexander V.; Chen, Yong P.; and Boltasseva, Alexandra, "Electrically Tunable Damping of Plasmonic Resonances with Graphene" (2012). Birck and NCN Publications. Paper 1126.
http://dx.doi.org/10.1021/nl302322t