Observation of whispering gallery modes through electron beam-induced deposition

被引：2

作者：

Timmermans, F. J. ^{[1
]}

Chang, L. ^{[1
]}

van Wolferen, H. A. G. M. ^{[2
]}

Lenferink, A. T. M. ^{[1
]}

Otto, C. ^{[1
]}

机构：

[1] Univ Twente, MIRA Inst, Med Cell BioPhys Grp, POB 217, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, MESA Inst, Transducers Sci & Technol, POB 217, NL-7500 AE Enschede, Netherlands

来源：

OPTICS LETTERS | 2017年 / 42卷 / 07期

关键词：

MORPHOLOGY-DEPENDENT RESONANCES; ENHANCED RAMAN-SCATTERING; WATER DROPLETS; SPECTROSCOPY; MICROSCOPY; CARBON; SIZE; MICRORESONATORS; MICROPARTICLES; MICRODROPLETS;

D O I：

10.1364/OL.42.001337

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Surprisingly intense spectra of whispering gallery modes were observed in polymer microbeads after illumination with electrons in a scanning electron microscope and subsequent laser illumination and spectral analysis. It will be proposed that whispering gallery mode resonances became visible after local deposition of hydrocarbon material through electron beam-induced deposition. The illumination of deposited material with a near infrared laser generates a broad light spectrum, acting as a local "white light" source that couples, for favorable wavelengths, with the WGM sustained by the sphere. This facilitates a spectroscopic analysis of the WGM and provides the Q-factor and free spectral range for all investigated particles. The analysis by an integrated SEM and Raman micro-spectrometer offers a direct approach to the analysis of WGM resonators as they instance, used in sensing. (C) 2017 Optical Society of America

引用

页码：1337 / 1340

页数：4

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