UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Nonlinear surface-plasmon whispering-gallery modes in metallic nanowire cavities

Biris, CG; Panoiu, NC; (2013) Nonlinear surface-plasmon whispering-gallery modes in metallic nanowire cavities. Physical Review Letters , 111 (20) 10.1103/PhysRevLett.111.203903. Green open access

[thumbnail of PhysRevLett.111.203903.pdf]
Preview
PDF
PhysRevLett.111.203903.pdf

Download (897kB)

Abstract

We demonstrate that the surface second-harmonic generation can lead to the formation of nonlinear plasmonic whispering-gallery modes (WGMs) in microcavities made of metallic nanowires. Since these WGMs are excited by induced surface nonlinear dipoles, they can be generated even when they are not coupled to the radiation continuum. Consequently, the quality factor of these nonlinear modes can be as large as the theoretical limit imposed by the optical losses in the metal. Remarkably, our theoretical analysis shows that nonlinear plasmonic WGMs are characterized by fractional azimuthal modal numbers. This suggests that the plasmonic cavities investigated here can be used to generate multicolor optical fields with fractional angular momentum. Applications to plasmonic sensors are also discussed. © 2013 American Physical Society.

Type: Article
Title: Nonlinear surface-plasmon whispering-gallery modes in metallic nanowire cavities
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.111.203903
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.111.203903
Language: English
Additional information: © 2013 American Physical Society
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1416272
Downloads since deposit
160Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item