Theory of resonance shifts in TE and TM whispering gallery modes by nonradial perturbations for sensing applications

被引：117

作者：

Teraoka, Iwao ^{[1
]}

Arnold, Stephen ^{[1
]}

机构：

[1] Polytech Univ, Microparticle Photophys Lab, Brooklyn, NY 11201 USA

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2006年 / 23卷 / 07期

关键词：

D O I：

10.1364/JOSAB.23.001381

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A perturbation theory is presented for the frequency shift of highly resonant photonic whispering gallery modes in a transparent sphere. Using a vector wave equation. we derive a general formula for the shifts in TE and TM polarization by adsorption of another dielectric medium. The adsorbed medium can have an arbitrary shape and refractive-index profile. The formula is applied to adsorption of a thin layer and deposition of a small spherical particle, many such particles, and thin cylindrical particles on the resonator surface. We found that the ratio of the TM mode shift to the TE mode shift is sensitive to the shape of the adsorbates and their orientation. Calculation results are discussed in terms of a dipolar field. (c) 2006 Optical Society of America.

引用

页码：1381 / 1389

页数：9

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