Extremely efficient coupling of silica toroid microresonator to silicon chip with photonic crystal waveguide

Yuyang Zhuang, Hajime Kumazaki, Shun Fujii, Takasumi Tanabe

研究成果: Conference contribution

抄録

Compact and low-loss coupling to whispering gallery mode (WGM) microresonators is important for a wide range of applications from fundamental physics to sensing and lasing, including a microresonator frequency comb. High-Q microresonators have been fabricated with silica and crystalline WGMs but highly efficient, robust, and compact coupling remained a challenge [1]. Although coupling to a silicon (Si) chip will allow a variety of applications, the major challenge is the large refractive index mismatch between high-Q microresonators (e.g., silica; nsilica = 1.44) and the commonly used photonic platforms (e.g., Si; nSi = 3.48) [2]. The large refractive index difference leads to a large phase mismatch. Here we found and demonstrated experimentally that extremely efficient coupling between a WGM and a Si chip is possible by using a 2D photonic crystal (PhC) waveguide (WG).

本文言語English
ホスト出版物のタイトルThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
出版社OSA - The Optical Society
ISBN(電子版)9781557528209
出版ステータスPublished - 2019
イベントThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019 - Munich, Germany
継続期間: 2019 6 232019 6 27

出版物シリーズ

名前Optics InfoBase Conference Papers
Part F140-CLEO_Europe 2019

Conference

ConferenceThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
CountryGermany
CityMunich
Period19/6/2319/6/27

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials

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