Special Section on Nanostructured Thin Films: Latest Developments in Theory and Practice

Hybrid plasmonic ring resonator at subwavelength scale in the visible spectrum

[+] Author Affiliations
Feifei Shi

Peking University, Shenzhen Graduate School, School of Electronic and Computer Engineering, A320 Peking University Campus, University Town, Xili, Nanshan District, Shenzhen 518055, China

Xin Gong

Peking University, Shenzhen Graduate School, School of Electronic and Computer Engineering, A320 Peking University Campus, University Town, Xili, Nanshan District, Shenzhen 518055, China

Zhaoyu Zhang

Peking University, Shenzhen Graduate School, School of Electronic and Computer Engineering, A320 Peking University Campus, University Town, Xili, Nanshan District, Shenzhen 518055, China

J. Nanophoton. 8(1), 083990 (Apr 09, 2014). doi:10.1117/1.JNP.8.083990
History: Received December 18, 2013; Revised March 14, 2014; Accepted March 17, 2014
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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 2.7×104. 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.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Feifei Shi ; Xin Gong and Zhaoyu Zhang
"Hybrid plasmonic ring resonator at subwavelength scale in the visible spectrum", J. Nanophoton. 8(1), 083990 (Apr 09, 2014). ; http://dx.doi.org/10.1117/1.JNP.8.083990


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