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Transmission of slow light through photonic crystal waveguide bends

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Abstract

The spectral dependence of the bending loss of cascaded 60° bends in photonic crystal (PhC) waveguides is explored in a slab-type silicon-on-insulator system. An ultralow bending loss of (0.05±0.03)dBbend is measured at wavelengths corresponding to the nearly dispersionless transmission regime. In contrast, the PhC bend is found to become completely opaque for wavelengths corresponding to the slow-light regime. A general strategy is presented and experimentally verified to optimize the bend design for improved slow-light transmission.

© 2006 Optical Society of America

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