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Title: High quality factor subwavelength grating waveguide micro-ring resonator based on trapezoidal silicon pillars

Abstract

Subwavelength grating waveguide-based micro-ring resonators (SWGMRs) are a promising platform for research in light–matter interaction. However, it is extremely difficult to achieve small radius SWGMR devices (e.g., 5 μm) with satisfying quality factors (e.g., ~10,000). One major issue is the large bend loss of small radius SWGMRs. In this work, we report the use of trapezoidal silicon pillars instead of conventional rectangular silicon pillars as building blocks of SWGMRs. We found that an asymmetric effective refractive index profile created by trapezoidal silicon pillars can significantly reduce the bend loss and therefore increase the quality factors of SWGMRs. For the first time to the best of our knowledge, we have experimentally demonstrated a 5 μm radius SWGMR made of trapezoidal silicon pillars (T-SWGMR) with an applicable quality factor as high as 11,500, 4.6 times of that (~2800) offered by a conventional SWGMR made of rectangular silicon pillars, which indicates an 81.4% reduction of the propagation loss. This approach can also be readily employed to enhance SWGMRs with larger radii. Furthermore, we have also experimentally demonstrated a 10 μm radius T-SWGMR with a quality factor as high as 45,000, which indicates a propagation loss as low as 6.07 dB/cm.

Authors:
 [1];  [2];  [1];  [1];  [3]
  1. Univ. of Texas, Austin, TX (United States)
  2. Omega Optics, Inc., Austin, TX (United States)
  3. Univ. of Texas, Austin, TX (United States); Omega Optics, Inc., Austin, TX (United States)
Publication Date:
Research Org.:
Omega Optics, Inc., Austin, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
OSTI Identifier:
1290581
Alternate Identifier(s):
OSTI ID: 1262103
Grant/Contract Number:  
SC0013178
Resource Type:
Accepted Manuscript
Journal Name:
Optics Letters
Additional Journal Information:
Journal Volume: 41; Journal Issue: 14; Journal ID: ISSN 0146-9592
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Wang, Zheng, Xu, Xiaochuan, Fan, Donglei, Wang, Yaguo, and Chen, Ray T. High quality factor subwavelength grating waveguide micro-ring resonator based on trapezoidal silicon pillars. United States: N. p., 2016. Web. doi:10.1364/OL.41.003375.
Wang, Zheng, Xu, Xiaochuan, Fan, Donglei, Wang, Yaguo, & Chen, Ray T. High quality factor subwavelength grating waveguide micro-ring resonator based on trapezoidal silicon pillars. United States. doi:10.1364/OL.41.003375.
Wang, Zheng, Xu, Xiaochuan, Fan, Donglei, Wang, Yaguo, and Chen, Ray T. Fri . "High quality factor subwavelength grating waveguide micro-ring resonator based on trapezoidal silicon pillars". United States. doi:10.1364/OL.41.003375. https://www.osti.gov/servlets/purl/1290581.
@article{osti_1290581,
title = {High quality factor subwavelength grating waveguide micro-ring resonator based on trapezoidal silicon pillars},
author = {Wang, Zheng and Xu, Xiaochuan and Fan, Donglei and Wang, Yaguo and Chen, Ray T.},
abstractNote = {Subwavelength grating waveguide-based micro-ring resonators (SWGMRs) are a promising platform for research in light–matter interaction. However, it is extremely difficult to achieve small radius SWGMR devices (e.g., 5 μm) with satisfying quality factors (e.g., ~10,000). One major issue is the large bend loss of small radius SWGMRs. In this work, we report the use of trapezoidal silicon pillars instead of conventional rectangular silicon pillars as building blocks of SWGMRs. We found that an asymmetric effective refractive index profile created by trapezoidal silicon pillars can significantly reduce the bend loss and therefore increase the quality factors of SWGMRs. For the first time to the best of our knowledge, we have experimentally demonstrated a 5 μm radius SWGMR made of trapezoidal silicon pillars (T-SWGMR) with an applicable quality factor as high as 11,500, 4.6 times of that (~2800) offered by a conventional SWGMR made of rectangular silicon pillars, which indicates an 81.4% reduction of the propagation loss. This approach can also be readily employed to enhance SWGMRs with larger radii. Furthermore, we have also experimentally demonstrated a 10 μm radius T-SWGMR with a quality factor as high as 45,000, which indicates a propagation loss as low as 6.07 dB/cm.},
doi = {10.1364/OL.41.003375},
journal = {Optics Letters},
number = 14,
volume = 41,
place = {United States},
year = {2016},
month = {7}
}

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    Works referencing / citing this record:

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    Ultra-Sharp Multi-Mode Waveguide Bending Assisted with Metamaterial-Based Mode Converters
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