Work

Tunable nonlinear graphene metasurfaces

Year: 2015

Type: article

Abstract: We introduce an important approach for enhancing the nonlinear response of graphene through its resonant coupling to a plasmonic metasurface via cascaded Fano resonances. Such a hybrid metasurface supports two types of subradiant resonant modes, i.e., asymmetric modes of structured metamaterial elements (``metamolecules'') and graphene plasmons exhibiting strong mutual coupling and avoided dispersion crossing. We demonstrate that the tunability of graphene plasmons facilitates the strong interaction between the subradiant modes, modifying the spectral position and lifetime of the Fano resonances. We reveal that a strong resonant interaction, combined with the subwavelength localization of plasmons, leads to an enhanced nonlinear response and high efficiency of the second-harmonic generation.

Source: Physical Review B

DOI: 10.1103/physrevb.92.161406

Authors: Daria A. Smirnova, Andrey E. Miroshnichenko, Yuri S. Kivshar, Alexander B. Khanikaev

Institutions: Australian National University, Queens College, CUNY, The Graduate Center, CUNY, City University of New York

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Australian Research Council, Basic Energy Sciences

Award: G1847291448