Spatial Beam Filtering with Autocloned Photonic Crystals

We have been numerically demonstrated the mechanism of spatial beam filtering with autocloned photonic crystals. The spatial filtering through different configurations of the multilayered structures based on a harmonically modulated substrate profile is considered. The paper demonstrates a series of parameter studies to look for the best spatial beam filtering performance. The optimization results show that a beam spectral width of 39.2 degrees can be reduced to that of 5.92 degrees, leading to high potential applications for integrated optical microsystems.