An attractive and realizable scheme of a compact two-dimensional (2D) photonic crystal (PhC) heterostructure is proposed for flexible light steering formed by integrating two PhC structures having diverse optical properties. The first PhC allows both TE- and TM-polarized light to propagate through it with minimum transmission loss (TL), whereas the second PhC structure is designed in such a way that TE-polarized light faces a photonic bandgap while self-collimated TM-polarized light travels without any diffraction. The study is conducted via a 2D finite element method. By the distinctive arrangement of both PhC structures, it is possible to obtain a TM-polarization maintaining device that offers a high polarization extinction ratio of ∼49 dB as well as a compact 180 bend for TE-polarized light with low TL. The proposed study is useful in designing PhC waveguides with sharp bends, which can be employed for multiple applications in photonic integrated circuits.

提出了一种紧凑的二维（2D）光子晶体（PhC）异质结构的有吸引力且可实现的方案，用于通过集成具有不同光学特性的两个PhC结构形成的柔性光导。第一个PhC允许TE偏振光和TM偏振光都以最小的传输损耗（TL）通过它传播，而第二个PhC结构被设计为TE偏振光面对光子带隙而自准直的TM-偏振光传播而没有任何衍射。该研究是通过2D有限元方法进行的。通过两种PhC结构的独特布置，可以获得TM偏振保持装置，该装置提供〜49 dB的高偏振消光比以及低TL的TE偏振光的紧凑180弯曲。