Magnusson R, Shin D, Liu Z S
Opt Lett. 1998 Apr 15;23(8):612-4. doi: 10.1364/ol.23.000612.
A new type of optical filter is predicted theoretically and verified experimentally. The filter operates under guided-mode resonance conditions in a thin-film waveguide grating. A high-efficiency reflection filter response is produced at the Brewster angle at which TM reflection is classically prohibited. Low-reflectance sidebands are obtained that are adjacent to the resonance peak induced by the Brewster effect in the neighborhood of the resonance peak. A double-layer waveguide grating yields 94% experimental reflectance at the thin-film Brewster angle for a Gaussian laser beam with TM polarization at the 1064-nm wavelength.
从理论上预测了一种新型光学滤波器，并通过实验进行了验证。该滤波器在薄膜波导光栅的导模共振条件下工作。在布儒斯特角处产生了高效的反射滤波器响应，而在经典情况下，该角度禁止TM反射。在共振峰附近获得了与布儒斯特效应引起的共振峰相邻的低反射率边带。对于波长为1064 nm、具有TM偏振的高斯激光束，双层波导光栅在薄膜布儒斯特角处的实验反射率为94%。
