TY - GEN
T1 - Extremely efficient coupling of silica toroid microresonator to silicon chip with photonic crystal waveguide
AU - Zhuang, Yuyang
AU - Kumazaki, Hajime
AU - Fujii, Shun
AU - Tanabe, Takasumi
PY - 2019/6
Y1 - 2019/6
N2 - 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).
AB - 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).
UR - http://www.scopus.com/inward/record.url?scp=85074651457&partnerID=8YFLogxK
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U2 - 10.1109/CLEOE-EQEC.2019.8873136
DO - 10.1109/CLEOE-EQEC.2019.8873136
M3 - Conference contribution
AN - SCOPUS:85074651457
T3 - 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
BT - 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
Y2 - 23 June 2019 through 27 June 2019
ER -