In this paper, we theoretically demonstrate a nanophotonic optical asymmetric transmission device (NOATD) for arbitrary linear polarization, which is composed of two two-dimensional (2D) square-lattice photonic crystals (PhCs) with different effective refractive indices. In this way, the NOATD achieves asymmetric transmission based on the generalized total reflection principle, which is able to realize a high forward transmittance (>0.6) and contrast ratio (>0.9) for arbitrary linearly polarized light in a broad wavelength range (>100 nm).

中文翻译：

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用于任意线性偏振光的高效非对称传输装置

在本文中，我们从理论上证明了一种用于任意线性偏振的纳米光子光学不对称传输设备（NOATD），该设备由两个具有不同有效折射率的二维（2D）方格光子晶体（PhC）组成。这样，NOATD基于广义的全反射原理实现了不对称透射，对于宽波长范围（> 100）中的任意线性偏振光，它都能实现高正向透射率（> 0.6）和对比度（> 0.9） nm）。