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Journal of Nanophotonics

Hybrid plasmonic ring resonator at subwavelength scale in the visible spectrum
Author(s): Feifei Shi
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Paper Abstract

In the past decade, plasmonic resonators have emerged and exploited field compression to create ultrasmall mode volume devices and to enhance light–matter interactions. We devised a ring resonator on a metal substrate separated by a low-permittivity dielectric, which supports hybrid plasmonic modes with a highly localized electromagnetic field. The finite difference time domain method was used to calculate the properties of the ring resonator. By changing the cavity’s geometry and low-permittivity dielectric’s height, a high-quality factor along with ultracompact mode confinement was achieved, leading to Purcell factor as high as 2.7×10 4 . The hybrid plasmonic ring resonator exhibits a trade-off between the high-quality factor and the ultrasmall mode volume at subwavelength scale in the visible spectrum.

Paper Details

Date Published: 9 April 2014
PDF: 7 pages
J. Nanophoton. 8(1) 083990 doi: 10.1117/1.JNP.8.083990
Published in: Journal of Nanophotonics Volume 8, Issue 1
Show Author Affiliations
Feifei Shi, Peking Univ. (China)

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