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Fine-tuned high-Q photonic-crystal nanocavity

2005; Optica Publishing Group; Volume: 13; Issue: 4 Linguagem: Inglês

10.1364/opex.13.001202

1094-4087

Yoshihiro Akahane, Takashi Asano, Bong-Shik Song, Susumu Noda,

Plasmonic and Surface Plasmon Research

A photonic nanocavity with a high Q factor of 100,000 and a modal volume V of 0.71 cubic wavelengths, is demonstrated. According to the cavity design rule that we discovered recently, we further improve a point-defect cavity in a two-dimensional (2D) photonic crystal (PC) slab, where the arrangement of six air holes near the cavity edges is fine-tuned. We demonstrate that the measured Q factor for the designed cavity increases by a factor of 20 relative to that for a cavity without displaced air holes, while the calculated modal volume remains almost constant.