Trends in Nano- and Micro-Cavities

by

O'Dae Kwon, Byoungho Lee, Kyungwon An

DOI: 10.2174/97816080523631110101
eISBN: 978-1-60805-236-3, 2011
ISBN: 978-1-60805-109-0



Indexed in: Scopus, EBSCO.

This ebook is a collection of cutting edge articles from the 2009 Workshop on Microcavities and their Applications (WOMA 2009). It giv...[view complete introduction]
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Theoretical and experimental characterization of double-disk whispering-gallery microcavities

- Pp. 252-266 (15)

Jee Soo Chang, Shinyoung Lee, Seung Hoon Lee, Jong-Bum You, Jung H. Shin and Bumki Min

Abstract

Double-disk resonators, composed of two nearly-identical dielectric disks separated by nanoscale air gap, can be configured to exhibit small modal volumes with high-Q factors. Compared to the two fundamental eigenmodes of a single-disk resonator (TE and TM), those supported by the double-disk microcavity are split into four modes, which can be categorized as symmetric and antisymmetric modes: TEs/TEas and TMs/TMas, depending on the field symmetry. Theoretical descriptions on these eigenmodes are given with regard to the cavity performance metrics such as cavity mode dispersion, Q-factor, and mode index. Experimental verification of these eigenmodes is provided for a 40-nm gap double-disk/air-slot resonator. In addition to these optical mode characterizations, the mechanical eigenmodes of double-disk structures, which can be actuated by the optical gradient forces, are investigated.

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