Fast calculation of the quality factor for two-dimensional photonic crystal slab nanocavities

Akihiro Fushimi, Hideaki Taniyama, Eiichi Kuramochi, Masaya Notomi, Takasumi Tanabe

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We developed a method that can accurately calculate the theoretical quality factor (Q) of a two-dimensional photonic crystal slab nanocavity at a very high speed. Because our method is based on a direct calculation of the out-of-slab radiation loss rate, it does not suffer from inplane loss, and this allows us to obtain the same Q with 0.18 times less calculation volume. In addition, we can obtain the Q immediately after finishing the cavity excitation, because our method uses only a snapshot of the wavevector space distribution of the resonant mode in contrast to the conventional method, where we need to fit the electro-magnetic field with an exponential decay that requires a relatively long data set. For a width-modulated line defect cavity that has a Q of 8.5 × 107we obtained the same value as with a conventional method but with 94% less computation time.

Original languageEnglish
Pages (from-to)23349-23359
Number of pages11
JournalOptics Express
Volume22
Issue number19
DOIs
Publication statusPublished - 2014 Sep 22

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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