Identifying modes of large whispering-gallery mode resonators from the spectrum and emission pattern

被引：58
|
作者：
Schunk, Gerhard [1 ,2 ,3 ]
Fuerst, Josef U. [1 ,2 ]
Foertsch, Michael [1 ,2 ,3 ]
Strekalov, Dmitry V. [1 ]
Vogl, Ulrich [1 ,2 ]
Sedlmeir, Florian [1 ,2 ,3 ]
Schwefel, Harald G. L. [1 ,2 ]
Leuchs, Gerd [1 ,2 ,4 ]
Marquardt, Christoph [1 ,2 ,5 ]
机构：
[1] Max Planck Inst Sci Light, Gunther Scharowsky Str 1 Bldg 24, D-90158 Erlangen, Germany
[2] Univ Erlangen Nurnberg, Inst Opt Informat & Photon, D-90158 Erlangen, Germany
[3] Sch Adv Opt Technol, D-91052 Erlangen, Germany
[4] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada
[5] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark
来源：
OPTICS EXPRESS | 2014年 / 22卷 / 25期
基金：
欧洲研究理事会;
关键词：
NEAR-FIELD PROBE; MONOLITHIC MICRORESONATOR; MICROSPHERE; GENERATION; MICROCAVITIES; SPECTROSCOPY;
D O I：
10.1364/OE.22.030795
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Identifying the mode numbers in whispering-gallery mode resonators (WGMRs) is important for tailoring them to experimental needs. Here we report on a novel experimental mode analysis technique based on the combination of frequency analysis and far-field imaging for high mode numbers of large WGMRs. The radial mode numbers q and the angular mode numbers p = l-m are identified and labeled via far-field imaging. The polar mode numbers l are determined unambiguously by fitting the frequency differences between individual whispering gallery modes (WGMs). This allows for the accurate determination of the geometry and the refractive index at different temperatures of the WGMR. For future applications in classical and quantum optics, this mode analysis enables one to control the narrow-band phase-matching conditions in nonlinear processes such as second-harmonic generation or parametric down-conversion. (C) 2014 Optical Society of America
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页码：30795 / 30806
页数：12
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