Numerical research on whispering-gallery modes in a triple-layer-coated microsphere resonator
Numerical research on whispering-gallery modes in a triple-layer-coated microsphere resonator
复制标题
三层涂层微球谐振器回音壁模式的数值研究
DOI:
10.1007/s11801-018-8056-3
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发表时间:
2018-09
影响因子:
0.9
通讯作者:
Wang Keyi
中科院分区:
文献类型:
--
作者:
Wang Mengyu;Jin Xueying;Wang Keyi
We numerically demonstrate that whispering-gallery modes (WGMs) in a microsphere resonator with three layers of high, low and high refractive index (RI) are analyzed by using the finite difference time domain (FDTD) method. To make the light couple in and out of the microsphere, a phase matched waveguide is used to overlap the WGMs evanescent radiation field. By changing the gap between the microsphere and waveguide, the WGMs of two high-RI layers are efficiently excited. The stored energy and the mode volume are optimized for sensing applications. The coupling structure reveals a good sensitivity of 38.29 nm/RIU (RI unit).
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