Tilted Nano-Grating Based Ultra-Compact Broadband Polarizing Beam Splitter for Silicon Photonics

Haipeng Liu; Jijun Feng; Jinman Ge; Shanqing Zhuang; Shuo Yuan; Yishu Chen; Xiaojun Li; Qinggui Tan; Qinghua Yu; Heping Zeng

doi:10.3390/nano11102645

Nanomaterials (Oct 2021)

Tilted Nano-Grating Based Ultra-Compact Broadband Polarizing Beam Splitter for Silicon Photonics

Haipeng Liu,
Jijun Feng,
Jinman Ge,
Shanqing Zhuang,
Shuo Yuan,
Yishu Chen,
Xiaojun Li,
Qinggui Tan,
Qinghua Yu,
Heping Zeng

Affiliations

Haipeng Liu: Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System, Ministry of Education, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Jijun Feng: Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System, Ministry of Education, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Jinman Ge: National Key Laboratory of Science and Technology on Space Microwave, China Academy of Space Technology, Xi’an 710100, China
Shanqing Zhuang: Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System, Ministry of Education, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Shuo Yuan: Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System, Ministry of Education, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Yishu Chen: Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System, Ministry of Education, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Xiaojun Li: National Key Laboratory of Science and Technology on Space Microwave, China Academy of Space Technology, Xi’an 710100, China
Qinggui Tan: National Key Laboratory of Science and Technology on Space Microwave, China Academy of Space Technology, Xi’an 710100, China
Qinghua Yu: Key Laboratory of Intelligent Infrared Perception, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
Heping Zeng: Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401120, China

DOI: https://doi.org/10.3390/nano11102645
Journal volume & issue: Vol. 11, no. 10
p. 2645

Abstract

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An ultra-compact broadband silicon polarizing beam splitter is proposed based on a tilted nano-grating structure. A light cross coupling can be realized for transverse-magnetic mode, while the transverse-electric light can almost completely output from the through port. The length of the coupling region is only 6.8 μm, while an extinction ratio of 23.76 dB can be realized at a wavelength of 1550 nm. As a proof of concept, the device was fabricated by a commercial silicon photonic foundry. It can realize a 19.84 dB extinction ratio and an 80 nm working bandwidth with an extinction ratio of larger than 10 dB. The presented device also shows a good fabrication tolerance to the structure deviations, which is favorable for its practical applications in silicon photonics.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

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