Tunable Resonances in the Plasmonic Split-Ring Resonator

Author

Jing Chen ; Yudong Li ; Zongqiang Chen ; Jingyang Peng ; Jun Qian ; Jingjun Xu ; Qian Sun

Author_Institution

MOE Key Lab. of Weak Light Nonlinear Photonics, Nankai Univ., Tianjin, China

Volume

6

Issue

3

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

6

Abstract

A nanoscale resonator composed of two metal-insulator-metal (MIM) waveguides and a split ring is investigated numerically. The multipolar plasmonic resonance modes can be excited, weakened, or even cut off by adjusting the split angle. These novel phenomena are due to the electric polarization in the split area. Odd modes exhibit when the electric field is polarized perpendicular to the split. The resonator acts as a LC circuit for the electric field polarized parallel to the split, in which even modes are excited. The capacitance diminished when the split depth is increased, and the resonance wavelengths of even modes exhibit blue shift. Our results imply an extensive potential for tunable multichannel filters and biosensor devices in integrated nano-optics.

Keywords

electric fields; integrated optics; nanophotonics; optical resonators; optical tuning; plasmonics; LC circuit; MIM; biosensor; blue shift; electric polarization; metal-insulator-metal waveguides; multichannel filters; multipolar plasmonic resonance modes; nanoscale resonator; plasmonic split-ring resonator; tunable resonances; Electric fields; Optical filters; Optical ring resonators; Optical waveguides; Plasmons; Resonator filters; Surface plasmons; integrated optics devices; optical resonators;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2014.2323294

Filename

6814796