Study on Silicon-Based Polarization Converter Using Asymmetric Slot Waveguide

Zejun ZHANG; Yasuhide TSUJI; Masashi EGUCHI; Chun-ping CHEN

doi:10.1587/transele.2019ESS0002

Study on Silicon-Based Polarization Converter Using Asymmetric Slot Waveguide

Zejun ZHANG, Yasuhide TSUJI, Masashi EGUCHI, Chun-ping CHEN

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A compact optical polarization converter (PC) based on slot waveguide has been proposed in this study. Utilizing the high refractive index contrast between a Si waveguide and SiO₂ cladding on the silicon-on-insulator platform, the light beam can be strongly confined in a slot waveguide structure. The proposed PC consists of a square waveguide and an L-shape cover waveguide. Since the overall structure is symmetrically distributed along the axis rotated 45-degree from the horizontal direction, the optical axis of this PC lies in the direction with equi-angle from two orthogonally polarized modes of the input and output ends, which leads to a high polarization conversion efficiency (PCE). 3D FDTD simulation results illustrate that a TE-to-TM mode conversion is achieved with a device length of 8.2 µm, and the PCE exceeds 99.8%. The structural tolerance and wavelength dependence of the PC have also been discussed in detail.

Publication: IEICE TRANSACTIONS on Electronics Vol.E103-C No.11 pp.605-608

Publication Date: 2020/11/01

Publicized: 2020/05/01

Online ISSN: 1745-1353

DOI: 10.1587/transele.2019ESS0002

Type of Manuscript: BRIEF PAPER

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Authors

Zejun ZHANG
  Kanagawa University
Yasuhide TSUJI
  Muroran Institute of Technology
Masashi EGUCHI
  Chitose Institute of Science and Technology
Chun-ping CHEN
  Kanagawa University

Keyword

polarization converter, slot waveguide, finite difference time domain method

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Zejun ZHANG, Yasuhide TSUJI, Masashi EGUCHI, Chun-ping CHEN, "Study on Silicon-Based Polarization Converter Using Asymmetric Slot Waveguide" in IEICE TRANSACTIONS on Electronics, vol. E103-C, no. 11, pp. 605-608, November 2020, doi: 10.1587/transele.2019ESS0002.
Abstract: A compact optical polarization converter (PC) based on slot waveguide has been proposed in this study. Utilizing the high refractive index contrast between a Si waveguide and SiO₂ cladding on the silicon-on-insulator platform, the light beam can be strongly confined in a slot waveguide structure. The proposed PC consists of a square waveguide and an L-shape cover waveguide. Since the overall structure is symmetrically distributed along the axis rotated 45-degree from the horizontal direction, the optical axis of this PC lies in the direction with equi-angle from two orthogonally polarized modes of the input and output ends, which leads to a high polarization conversion efficiency (PCE). 3D FDTD simulation results illustrate that a TE-to-TM mode conversion is achieved with a device length of 8.2 µm, and the PCE exceeds 99.8%. The structural tolerance and wavelength dependence of the PC have also been discussed in detail.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2019ESS0002/_p

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@ARTICLE{e103-c_11_605,
author={Zejun ZHANG, Yasuhide TSUJI, Masashi EGUCHI, Chun-ping CHEN, },
journal={IEICE TRANSACTIONS on Electronics},
title={Study on Silicon-Based Polarization Converter Using Asymmetric Slot Waveguide},
year={2020},
volume={E103-C},
number={11},
pages={605-608},
abstract={A compact optical polarization converter (PC) based on slot waveguide has been proposed in this study. Utilizing the high refractive index contrast between a Si waveguide and SiO₂ cladding on the silicon-on-insulator platform, the light beam can be strongly confined in a slot waveguide structure. The proposed PC consists of a square waveguide and an L-shape cover waveguide. Since the overall structure is symmetrically distributed along the axis rotated 45-degree from the horizontal direction, the optical axis of this PC lies in the direction with equi-angle from two orthogonally polarized modes of the input and output ends, which leads to a high polarization conversion efficiency (PCE). 3D FDTD simulation results illustrate that a TE-to-TM mode conversion is achieved with a device length of 8.2 µm, and the PCE exceeds 99.8%. The structural tolerance and wavelength dependence of the PC have also been discussed in detail.},
keywords={},
doi={10.1587/transele.2019ESS0002},
ISSN={1745-1353},
month={November},}

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TY - JOUR
TI - Study on Silicon-Based Polarization Converter Using Asymmetric Slot Waveguide
T2 - IEICE TRANSACTIONS on Electronics
SP - 605
EP - 608
AU - Zejun ZHANG
AU - Yasuhide TSUJI
AU - Masashi EGUCHI
AU - Chun-ping CHEN
PY - 2020
DO - 10.1587/transele.2019ESS0002
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E103-C
IS - 11
JA - IEICE TRANSACTIONS on Electronics
Y1 - November 2020
AB - A compact optical polarization converter (PC) based on slot waveguide has been proposed in this study. Utilizing the high refractive index contrast between a Si waveguide and SiO₂ cladding on the silicon-on-insulator platform, the light beam can be strongly confined in a slot waveguide structure. The proposed PC consists of a square waveguide and an L-shape cover waveguide. Since the overall structure is symmetrically distributed along the axis rotated 45-degree from the horizontal direction, the optical axis of this PC lies in the direction with equi-angle from two orthogonally polarized modes of the input and output ends, which leads to a high polarization conversion efficiency (PCE). 3D FDTD simulation results illustrate that a TE-to-TM mode conversion is achieved with a device length of 8.2 µm, and the PCE exceeds 99.8%. The structural tolerance and wavelength dependence of the PC have also been discussed in detail.
ER -