Opt Lett. 2018 Nov 1;43(21):5226-5229. doi: 10.1364/OL.43.005226.
We report the design and implementation of a one-dimensional guided-mode resonance filter (1D-GMRF) aiming to achieve polarization insensitivity at conical mounting. (The incident plane is aligned neither perpendicularly nor parallelly to the grating bars.) The design guideline indicates that, at conical mounting, polarization insensitivity of the 1D-GMRF can be achieved by optimizing the grating parameters to excite the fundamental TE and the fundamental TM waveguide modes simultaneously. Moreover, it is revealed that, at conical mounting, the polarization-insensitive GMR position in the angle-resolved resonance spectra is azimuthal angle ϕ-dependent. The experimental results demonstrate that polarization insensitivity of the fabricated 1D-GMRF occurs at the resonance wavelength of ∼673 nm for the conical mounting of azimuthal angle ϕ≈30° and incident angle θ≈11.2°, which agree with the simulated results.
我们报告了一种一维导模共振滤波器（1D-GMRF）的设计和实现，旨在实现锥形安装时的偏振不敏感性。（入射平面既不垂直也不平行于光栅条。）设计准则表明，在锥形安装中，可以通过优化光栅参数来同时激励基本 TE 和基本 TM 波导模式，从而实现 1D-GMRF 的偏振不敏感性。此外，还揭示了在锥形安装中，角度分辨共振光谱中偏振不敏感的 GMR 位置与方位角 ϕ 有关。实验结果表明，在方位角 ϕ≈30°和入射角 θ≈11.2°的锥形安装下，所制造的 1D-GMRF 在约 673nm 的共振波长处表现出偏振不敏感性，这与模拟结果一致。
