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

Abstract

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.

12 pages, 4 figures

References in corpus (2)

• Coupled-mode theory for stimulated Raman scattering in high-Q/Vm silicon photonic band gap defect cavity lasers
• Observations of interior whispering gallery modes in asymmetric optical resonators with rational caustics

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• Reconfigurable nonreciprocity with nonlinear Fano diode
• Selective tuning of high-Q silicon photonic crystal nanocavities via laser-assisted local oxidation
• Parametric Optomechanical Oscillations in Two-Dimensional Slot-Type High-Q Photonic Crystal Cavities
• A superhigh-frequency optoelectromechanical system based on a slotted photonic crystal cavity