Demonstration of an air-slot mode-gap confined photonic crystal slab nanocavity with ultrasmall mode volumes

Details Demonstration of an air-slot mode-gap confined photonic crystal slab nanocavity with ultrasmall mode volumes Demonstration of an air-slot mode-gap confined photonic crystal slab nanocavity with ultrasmall mode volumes

2009-10-21

arxiv.org/abs/0910.4111v2

Physics

Optics

12 pages, 4 figures

Scientific paper

We demonstrate experimentally an air-slot mode-gap photonic crystal cavity with quality factor of 15,000 and modal volume of 0.02 cubic wavelengths, based on the design of an air-slot in a width-modulated line-defect in a photonic crystal slab. The origin of the high Q air-slot cavity mode is the mode-gap effect from the slotted photonic crystal waveguide mode with negative dispersion. The high Q cavities with ultrasmall mode volume are important for applications such as cavity quantum electrodynamics, nonlinear optics and optical sensing.

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