Crystalline MgF2 whispering gallery mode resonators for enhanced bulk index sensitivity

被引：0
|
作者：
R. Zeltner
F. Sedlmeir
G. Leuchs
H. G. L. Schwefel
机构：
[1] University of Erlangen-Nuremberg,Institute for Optics, Information and Photonics
[2] Germany,undefined
[3] Max-Planck-Institute for the Science of Light,undefined
[4] School in Advanced Optical Technologie,undefined
来源：
The European Physical Journal Special Topics | 2014年 / 223卷
关键词：
Refractive Index; European Physical Journal Special Topic; Polarization Beam Splitter; Whispering Gallery Mode; Refractive Index Contrast;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We report on experiments on refractrometric sensing with crystalline Whispering Gallery Mode (WGM) resonators made of magnesium fluoride, which has a refractive index that is only slightly larger than that of water (Δn ≈ 0.05). The resulting evanescent field of a WGM resonator placed in an aqueous environment penetrates therefore deep into the surrounding medium, which makes it a promising candidate for sensing applications. We measured a bulk index sensitivity of 1.09 nm/RIU (refractive index unit) in a resonator with a radius of R = 2.91 mm and intrinsic Q-factors of more than 108 in aqueous environments. Furthermore, we describe the fabrication process of crystalline WGM resonators.
引用
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页码：1989 / 1994
页数：5
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