Ultrahigh-Q one-dimensional photonic crystal nanocavities with modulated mode-gap barriers on SiO2 claddings and on air claddings

Eiichi Kuramochi; Hideaki Taniyama; Takasumi Tanabe; Kohei Kawasaki; Young Geun Roh; Masaya Notomi

doi:10.1364/OE.18.015859

Ultrahigh-Q one-dimensional photonic crystal nanocavities with modulated mode-gap barriers on SiO₂ claddings and on air claddings

Eiichi Kuramochi, Hideaki Taniyama, Takasumi Tanabe, Kohei Kawasaki, Young Geun Roh, Masaya Notomi

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

139 Citations (Scopus)

Abstract

We report designs for a silicon-on-insulator (SOI) onedimensional (ID) photonic crystal (PhC) nanocavity with modulated modegap barriers based on the lowest dielectric band. These cavities have an ultrahigh theoretical quality factor (Q) of 10⁷-10⁸ while maintaining a very small modal volume of 0.6-2.0 (λ/n)³, which are the highest Q for any nanocavities with SiO₂ under-cladding. We have fabricated these SOI 1DPhC cavities and confirmed that they exhibited a Q of 3.6×10 ⁵, which is also the highest measured Q for SOI-type PhC nanocavities. We have also applied the same design to ID PhC cavities with air claddings, and found that they exhibit a theoretical quality factor higher than 10⁹. The fabricated air-cladding ID Si PhC cavities have showed a quality factor of 7.2×10⁵, which is close to the highest Q value for ID PhC cavities.

Original language	English
Pages (from-to)	15859-15869
Number of pages	11
Journal	Optics Express
Volume	18
Issue number	15
DOIs	https://doi.org/10.1364/OE.18.015859
Publication status	Published - 2010 Jul 19
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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title = "Ultrahigh-Q one-dimensional photonic crystal nanocavities with modulated mode-gap barriers on SiO2 claddings and on air claddings",

abstract = "We report designs for a silicon-on-insulator (SOI) onedimensional (ID) photonic crystal (PhC) nanocavity with modulated modegap barriers based on the lowest dielectric band. These cavities have an ultrahigh theoretical quality factor (Q) of 107-108 while maintaining a very small modal volume of 0.6-2.0 (λ/n)3, which are the highest Q for any nanocavities with SiO2 under-cladding. We have fabricated these SOI 1DPhC cavities and confirmed that they exhibited a Q of 3.6×10 5, which is also the highest measured Q for SOI-type PhC nanocavities. We have also applied the same design to ID PhC cavities with air claddings, and found that they exhibit a theoretical quality factor higher than 109. The fabricated air-cladding ID Si PhC cavities have showed a quality factor of 7.2×105, which is close to the highest Q value for ID PhC cavities.",

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AU - Kuramochi, Eiichi

AU - Taniyama, Hideaki

AU - Tanabe, Takasumi

AU - Kawasaki, Kohei

AU - Roh, Young Geun

AU - Notomi, Masaya

PY - 2010/7/19

Y1 - 2010/7/19

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Ultrahigh-Q one-dimensional photonic crystal nanocavities with modulated mode-gap barriers on SiO₂ claddings and on air claddings

Abstract

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