Coupling of a whispering gallery mode to a silicon chip with photonic crystal

Yuyang Zhuang; Hajime Kumazaki; Shun Fujii; Riku Imamura; Nurul Ashikin Binti Daud; Rammaru Ishida; Heming Chen; Takasumi Tanabe

doi:10.1364/OL.44.005731

Coupling of a whispering gallery mode to a silicon chip with photonic crystal

Yuyang Zhuang, Hajime Kumazaki, Shun Fujii, Riku Imamura, Nurul Ashikin Binti Daud, Rammaru Ishida, Heming Chen, Takasumi Tanabe

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

We demonstrate the efficient coupling (99.5%) of a silica whispering gallery mode microresonator directly with a silicon chip by using a silicon photonic crystal waveguide as a coupler. The efficient coupling is attributed to the small effective refractive index difference between the two devices. The large group index of the photonic crystal waveguide mode also contributes to the efficient coupling. A coupling Q of 2.68 × 10⁶ is obtained, which allows us to achieve the critical coupling of a silica whispering gallery mode with an intrinsic Q of close to 10⁷ with a Si chip.

Original language	English
Pages (from-to)	5731-5734
Number of pages	4
Journal	Optics Letters
Volume	44
Issue number	23
DOIs	https://doi.org/10.1364/OL.44.005731
Publication status	Published - 2019

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Access to Document

10.1364/OL.44.005731

Cite this

@article{2f68bfa528954ad7b241254ee49c5302,

title = "Coupling of a whispering gallery mode to a silicon chip with photonic crystal",

abstract = "We demonstrate the efficient coupling (99.5%) of a silica whispering gallery mode microresonator directly with a silicon chip by using a silicon photonic crystal waveguide as a coupler. The efficient coupling is attributed to the small effective refractive index difference between the two devices. The large group index of the photonic crystal waveguide mode also contributes to the efficient coupling. A coupling Q of 2.68 × 106 is obtained, which allows us to achieve the critical coupling of a silica whispering gallery mode with an intrinsic Q of close to 107 with a Si chip.",

author = "Yuyang Zhuang and Hajime Kumazaki and Shun Fujii and Riku Imamura and Daud, {Nurul Ashikin Binti} and Rammaru Ishida and Heming Chen and Takasumi Tanabe",

note = "Funding Information: Japan Society for the Promotion of Science (JP16K13702, JP19H00873); Strategic Information and Communications RD Promotion Programme (SCOPE) (191603001); China Scholarship Council (201808320337). Funding Information: Funding. Japan Society for the Promotion of Science (JP16K13702, JP19H00873); Strategic Information and Communications RD Promotion Programme (SCOPE) (191603001); China Scholarship Council (201808320337). Publisher Copyright: {\textcopyright} 2019 Optical Society of America.",

year = "2019",

doi = "10.1364/OL.44.005731",

language = "English",

volume = "44",

pages = "5731--5734",

journal = "Optics Letters",

issn = "0146-9592",

publisher = "The Optical Society",

number = "23",

}

TY - JOUR

T1 - Coupling of a whispering gallery mode to a silicon chip with photonic crystal

AU - Zhuang, Yuyang

AU - Kumazaki, Hajime

AU - Fujii, Shun

AU - Imamura, Riku

AU - Daud, Nurul Ashikin Binti

AU - Ishida, Rammaru

AU - Chen, Heming

AU - Tanabe, Takasumi

N1 - Funding Information: Japan Society for the Promotion of Science (JP16K13702, JP19H00873); Strategic Information and Communications RD Promotion Programme (SCOPE) (191603001); China Scholarship Council (201808320337). Funding Information: Funding. Japan Society for the Promotion of Science (JP16K13702, JP19H00873); Strategic Information and Communications RD Promotion Programme (SCOPE) (191603001); China Scholarship Council (201808320337). Publisher Copyright: © 2019 Optical Society of America.

PY - 2019

Y1 - 2019

N2 - We demonstrate the efficient coupling (99.5%) of a silica whispering gallery mode microresonator directly with a silicon chip by using a silicon photonic crystal waveguide as a coupler. The efficient coupling is attributed to the small effective refractive index difference between the two devices. The large group index of the photonic crystal waveguide mode also contributes to the efficient coupling. A coupling Q of 2.68 × 106 is obtained, which allows us to achieve the critical coupling of a silica whispering gallery mode with an intrinsic Q of close to 107 with a Si chip.

AB - We demonstrate the efficient coupling (99.5%) of a silica whispering gallery mode microresonator directly with a silicon chip by using a silicon photonic crystal waveguide as a coupler. The efficient coupling is attributed to the small effective refractive index difference between the two devices. The large group index of the photonic crystal waveguide mode also contributes to the efficient coupling. A coupling Q of 2.68 × 106 is obtained, which allows us to achieve the critical coupling of a silica whispering gallery mode with an intrinsic Q of close to 107 with a Si chip.

UR - http://www.scopus.com/inward/record.url?scp=85075739467&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85075739467&partnerID=8YFLogxK

U2 - 10.1364/OL.44.005731

DO - 10.1364/OL.44.005731

M3 - Article

C2 - 31774765

AN - SCOPUS:85075739467

SN - 0146-9592

VL - 44

SP - 5731

EP - 5734

JO - Optics Letters

JF - Optics Letters

IS - 23

ER -

Coupling of a whispering gallery mode to a silicon chip with photonic crystal

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this