论文标题
介电扰动：光谐振器中异常的共振频率转移
Dielectric perturbations: anomalous resonance frequency shifts in optical resonators
论文作者
论文摘要
高质量的耳语画廊模式谐振器周围的介电环境中的小扰动通常会导致谐振器模式的频移与扰动的极化性直接成正比。在这里，我们报告了强频移的实验观察结果，这些观察结果可能相反，甚至超过了扰动性的极化性的贡献。使用折射率含量为1.50到4.22的折射率的底物，将硅甲酸锂低语库模式谐振器的模式频率移动。当底物转移到耳语画廊模式的逃生场时，观察到蓝色和红移，以及模式线宽的增加。我们将实验结果与Foreman等人的理论模型进行了比较。并基于光学域的鹅halchen偏移提供其他直观的解释。
Small perturbations in the dielectric environment around a high quality whispering gallery mode resonator usually lead to a frequency shift of the resonator modes directly proportional to the polarizability of the perturbation. Here, we report experimental observations of strong frequency shifts that can be opposite and even exceed the contribution of the perturbations' polarizability. The mode frequencies of a lithium niobate whispering gallery mode resonator are shifted using substrates of refractive indices ranging from 1.50 to 4.22. Both blue- and red-shifts are observed, as well as an increase in mode linewidth, when substrates are moved into the evanescent field of the whispering gallery mode. We compare the experimental results to a theoretical model by Foreman et al. and provide an additional intuitive explanation based on the Goos-Hänchen shift for the optical domain.
