Influence of graphene on quality factor variation in a silicon ring resonator

Selectively patterned graphene is integrated onto a silicon ring resonator to investigate the quality factor (Q factor) variation. The Q factor sharply decreases from 7900 to 1200 as the patterned graphene length increases from 0 to 20 μm. A numerical estimation, which takes into account optical abs...

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Bibliographic Details
Published in:Applied physics letters 2014-03, Vol.104 (9), p.91122
Main Authors: Kou, Rai, Tanabe, Shinichi, Tsuchizawa, Tai, Yamamoto, Tsuyoshi, Hibino, Hiroki, Nakajima, Hirochika, Yamada, Koji
Format: Article
Language:English
Subjects:
ABSORPTION
Applied physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DAMPING
GRAPHENE
LENGTH
Photonics
Q factors
QUALITY FACTOR
RESONATORS
SILICON
VARIATIONS
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Summary:Selectively patterned graphene is integrated onto a silicon ring resonator to investigate the quality factor (Q factor) variation. The Q factor sharply decreases from 7900 to 1200 as the patterned graphene length increases from 0 to 20 μm. A numerical estimation, which takes into account optical absorption by graphene, shows an exponential damping of the Q factor with increasing graphene length and is consistent with the experimental result. We expect these fundamental characterizations to be helpful in developing graphene-integrated silicon photonics applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4867472