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InGaAs-embedded photonic crystal photodetectors were demonstrated towards realizing photoreceivers with small junction capacitance. A 1-A/W responsivity and a 40-Gb/s eye opening were successfully confirmed for the 1.7-µm-long device.
Multi-bit optical memories based on a monolithic 128-channel array of photonic crystal nanocavities on a Si chip and a 32-channel array of nanocavities with a built-in buried heterostructure on an InP chip are demonstrated.
We demonstrate enhanced optical nonlinearity in a coupled-resonator optical waveguide comprised of 200 silicon photonic crystal nanocavities. We have obtained the effective nonlinear constant γ as 6,600 /W/m through the four wave mixing experiment.
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