Ultrahigh- Q photonic crystal nanocavities realized by the local width modulation of a line defect

Eiichi Kuramochi, Masaya Notomi, Satoshi Mitsugi, Akihiko Shinya, Takasumi Tanabe, Toshifumi Watanabe

Research output: Contribution to journalArticlepeer-review

433 Citations (Scopus)

Abstract

We propose an ultrahigh quality factor (Q) photonic crystal slab nanocavity created by the local width modulation of a line defect. We show numerically that this nanocavity has an intrinsic Q value of up to 7× 107. Transmission measurements for fabricated Si photonic-crystal-slab nanocavities directly coupled to input/output waveguides have exhibited a loaded Q value of ∼800 000. These theoretical and experimental Q values are very high for photonic crystal nanocavities. In addition, we demonstrate that simply shifting two holes away from a line defect is sufficient to achieve an ultrahigh Q value both theoretically and experimentally.

Original languageEnglish
Article number041112
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume88
Issue number4
DOIs
Publication statusPublished - 2006 Feb 6
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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