高斯光束在微腔中的菲涅耳滤波
Fresnel filtering of Gaussian beams in microcavities
摘要：
我们研究了准体育场微腔中高斯光束叠加所描述的模式的输出。实验观察到当高斯光束入射到腔界面的角度接近全内反射的临界角时，输出偏离了斯涅耳定律，为菲涅耳滤波提供了直接的实验证据。本文给出了平面界面菲涅耳滤波的理论，定性地再现了实验数据，并对实验数据与理论的微小偏差进行了讨论。
英文摘要：
We study the output from the modes described by the superposition of Gaussian beams confined in the quasi-stadium microcavities. We experimentally observe the deviation from Snell's law in the output when the incident angle of the Gaussian beam at the cavity interface is near the critical angle for total internal reflection, providing direct experimental evidence on the Fresnel filtering. The theory of the Fresnel filtering for a planar interface qualitatively reproduces experimental data, and a discussion is given on small deviation between the measured data and the theory.
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