13 November 2014 High-contrast grating hollow-core waveguide splitter applied to optical phased array
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A novel hollow-core (HW) Y-branch waveguide splitter based on high-contrast grating (HCG) is presented. We calculated and designed the HCG-HW splitter using Rigorous Coupled Wave Analysis (RCWA). Finite-different timedomain (FDTD) simulation shows that the splitter has a broad bandwidth and the branching loss is as low as 0.23 dB. Fabrication is accomplished with standard Silicon-On-Insulator (SOI) process. The experimental measurement results indicate its good performance on beam splitting near the central wavelength λ = 1550 nm with a total insertion loss of 7.0 dB.
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Che Zhao, Ping Xue, Hanxing Zhang, Te Chen, Chao Peng, Weiwei Hu, "High-contrast grating hollow-core waveguide splitter applied to optical phased array", Proc. SPIE 9277, Nanophotonics and Micro/Nano Optics II, 92770C (13 November 2014); doi: 10.1117/12.2072416; https://doi.org/10.1117/12.2072416

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