Characteristics of whispering gallery modes in single dielectric spheroid excited by Gaussian beam
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概要
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We have numerically analyzed a coupling between a Gaussian light and spheroids by using a finite-difference time-domain method. In a configuration where the polarization of light is directed along the short axis of the spheroid and light is incident along the long axis, there exists a complex whispering gallery mode (WGM), which cannot be observed for any spheres. The characteristics of such a complex WGM are similar to those produced from a combination of several WGM's. In a configuration where the polarization of light is directed along the long axis of the spheroid and light is incident along the short axis, the $Q$-factor of a WGM excited there decreases compared with that of the WGM of a sphere because the curvature around the edges of the long axis is considerably large and thus the confinement of light must be weak.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-07-15
著者
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Fukui M
Department Of Applied Mathematics Faculty Of Engineering Science Osaka University
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Haraguchi Masanobu
Department Of Electrical And Electronic Engineering Faculty Of Engineering The University Of Tokushi
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Okamoto Toshihiro
Department Of Chemistry The University Of Tokyo
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Fujii Masamitsu
Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima, 2-1 Minamijosanjima, Tokushima 770-8506, Japan
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Fujii Masamitsu
Department of Optical Science and Technology, The University of Tokushima, 2-1 Minamijosanjima, Tokushima 770-8506, Japan
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Fukui Masuo
Department of Optical Science and Technology, The University of Tokushima, 2-1 Minamijosanjima, Tokushima 770-8506, Japan
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Okamoto Toshihiro
Department of Optical Science and Technology, The University of Tokushima, 2-1 Minamijosanjima, Tokushima 770-8506, Japan
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Okamoto Toshihiro
Department of Advanced Electron Devices, The Institute of Scientific and Industrial Research (ISIR), Osaka University, Ibaraki, Osaka 567-0047, Japan
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Fujii Masamitsu
Department of Ophthalmology, Shimane Medical University
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