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We analyze photonic crystal based optical nanocavity structures. The result indicates that the photonic crystal based cavity structure has the promising application toward optomechanics. The structure also has a potential application for cavity-QED due to large Q-factor and small modal volume.
A new photonic crystal nanocavity combined with built-in air slots achieved an experimental Q of over 106 even when the photonic crystals on either side of the line defect had only a few lateral periods.
In this talk, we will present our recent progress in terms of photonic-crystal cavities, and discuss its impact on various optical phenomena and applications. First, we used it for delaying the light propagation. Second, we applied it for all optical switching operation. Finally, we discuss dynamic control of light in high-Q cavities.
By employing ultra-small high-Q photonic crystal nanocavities, we demonstrated 1-ns photon trapping and 1.45-ns pulse delaying. The corresponding light speed is 5,800 km/s. We also demonstrated dynamic tuning of the Q within the photon lifetime.
We discuss several interesting applications of ultrahigh-Q and ultrasmall nanocavities recently realized in silicon photonic-crystal slabs: 1) All-dielectric slow-light media, 2) All-optical bistable switching elements towards all-optical logic chips, 3) Adiabatic wavelength conversion, 4) Super-efficient optomechanical energy converter.
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