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.
![[thumbnail of PhysRevLett.111.203903.pdf]](https://discovery.ucl.ac.uk/style/images/fileicons/application_pdf.png) 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 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
