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Updated: Jun 4, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Plasmonic resonance of whispering gallery modes in an Au cylinder
Xining Zhang1, Zhe Ma, Huakang Yu
1State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China.
Abstract:
We demonstrate whispering gallery (WG) resonance of surface plasmon polaritons (SPPs) in a 2-dimensional confined Au cylinder by self interference. Despite the leakage of SPPs along the axis of the cylinder, Q factors of 375 are obtained in a cylinder with diameter of 30 μm. The coupling-angle-dependence of the WG resonance is also investigated. Our results open opportunities for a new category of plasmonic cavities with 2-dimensional confinement, and this may be applied to a variety of simple and natural metallic micro or nanostructures.
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