Materials, Photonic Devices, and Sensors

Waveguide-based antireflection structure

[+] Author Affiliations
Zhongshu Zhu

Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Luoyu Road 1037, Wuhan 430074, China

Huazhong University of Science and Technology, School of Optical and Electronic Information, Luoyu Road 1037, Wuhan 430074, China

Xun Li

Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Luoyu Road 1037, Wuhan 430074, China

McMaster University, Department of Electrical and Computer Engineering, 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada

Opt. Eng. 55(4), 047101 (Apr 01, 2016). doi:10.1117/1.OE.55.4.047101
History: Received November 4, 2015; Accepted March 11, 2016
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Abstract.  A waveguide-based antireflection structure is proposed. The device consists of two polarization rotators (PRs), two polarization-distinguished 90-deg phase delay units (PDUs), and a polarization beam combiner (PBC). The PR and PDU, providing the same function as a quarter wave plate in free-space optics, convert a linearly polarized light into a circularly polarized light. Upon reflection from an isotropic homogenous interface, the returned light is converted back into a linearly polarized light in its perpendicular direction. Through the PBC placed at the input port, the returned light is then redirected into a different port for further use or discard. Our three-dimensional mode-matching method-based simulation shows that, on the silicon-on-insulator waveguide platform, the total device length can be made as short as 10.5  μm.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Zhongshu Zhu and Xun Li
"Waveguide-based antireflection structure", Opt. Eng. 55(4), 047101 (Apr 01, 2016). ; http://dx.doi.org/10.1117/1.OE.55.4.047101


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