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A COMPACT 90° BENT EQUAL OUTPUT PORTS OF PHOTONIC CRYSTAL BEAM SPLITTER WITH COMPLETE BAND GAP BASED ON DEFECT RESONANCE INTERFACE

By W. Yang and Y.-F. Chau

Full Article PDF (580 KB)

Abstract:
A compact 90° bent equal output ports of photonic crystal (PC) beam splitter (BS) with complete band gap (CPBG) based on the effect of defect resonance interface (DRI) in PC waveguides is designed and analyzed. The finite-difference time-domain method is adopted to simulate the relevant structures of defect mode in a two dimensional square lattice circular dielectric rods of anisotropic PC. The device size reduction and flexibility in polarization dependence compared with the conventional PCBS can be attributed to the same resonant frequency for both transverse-magnetic and transverse-electric polarization, because the PC structures designed here have a CPBG. The merit of our proposed PCBSs with identical lights at the output ports possess the short coupling length with direct coupling (the coupling length is the same as that of the width of DRI, 3a) and the short distance without cross-talk among the output ports (only three lattice constant, 3a), thus helping the design flexibility of the PCBSs in IOCs.

Citation:
W. Yang and Y.-F. Chau, "A Compact 90° Bent Equal Output Ports of Photonic Crystal Beam Splitter with Complete Band Gap Based on Defect Resonance Interface," Progress In Electromagnetics Research M, Vol. 27, 231-240, 2012.
doi:10.2528/PIERM12102805

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