Chinese Optics Letters, 2009, 7 (3): 03251, Published Online: Mar. 20, 2009
New type of Y-branch power splitter and beam expander based on eliminating anomalous reflection effect Download: 602次
光子晶体 自准直 反常反射 分束器 扩束器 350.4238 Nanophotonics and photonic crystals 230.1360 Beam splitters 120.1680 Collimation
Abstract
We propose a new type of Y-branch power splitter and beam expander with scales of microns in two-dimensional (2D) photonic crystals (PCs) by drilling air holes in a silicon slice. Its functionality and performance are numerically investigated and simulated by finite-difference time-domain (FDTD) method. Simulation results show that the splitter can split a TE polarized light beam into two parallel sub-beams and the distance between them is tunable by changing the parameters of the splitter, while the expander can expand a narrow beam into a wider one, which is realized in an integrated optical circuit. The proposed device is based on the avoiding of anomalous reflection effect and the coupling transmission of defect modes of the interfaces.
Jian Sun, Yifeng Shen, Juan Wang, Lulu Sun, Kui Han, Gang Tang, Guozhong Wang. New type of Y-branch power splitter and beam expander based on eliminating anomalous reflection effect[J]. Chinese Optics Letters, 2009, 7(3): 03251.