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A pulse delay more than ten times the pulse width was experimentally achieved in low-loss coupled cavity waveguides formed by 300 photonic crystal nanocavities.
The transmission performances of a random metal-dielectric film composed of silver metal and spherical fused silica balls were experimentally investigated for intensity- and frequency-modulated optical signals. The film was formed on the facet of a laser diode, and intensity-modulated optical signals emitted from the laser diode were successfully transmitted through it. Frequency-modulation optical...
Recent progress in ultrahigh-Q and ultrasmall cavities based on photonic-crystal slabs have impacts on various phenomena. We report our recent investigations of all-optical bistable switching/memory action toward all-optical logic, and novel adiabatic tuning phenomena (wavelength conversion, opto-mechanical energy conversion, and photon dynamic memory).
In this study, we apply recently-developed photonic-crystal ultrahigh-Q nanocavities to on-chip all-optical control, including all-optical bistable nodes towards photonic RAM and all-optical logic, all-dielectric slow-light media, and novel adiabatic wavelength conversion.
Ultrasmall and ultra-high-Q optical cavities have been realized in photonic-crystal slabs, which have a number of exceptional features hardly available in other media. These cavities have been applied to all-optical switches and bistable memories in a Si photonic-crystal chip. They are integratable in a small chip and consume extremely small energies. We discuss their potential for on-chip optical...
In silicon photonic wire waveguides, the four-wave mixing effect provides efficient wavelength conversion, with internal conversion efficiency of about -11 dB. The two-photon absorption effect in the waveguides also provides efficient and wideband all-optical amplitude modulation
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