Dispersionless tunneling of slow light in antisymmetric photonic crystal couplers

Optical Society of America
Publication Type:
Journal Article
Optics Express, 2008, 16 (2), pp. 1104 - 1114
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We suggest a novel and general approach to the design of photonic-crystal directional couplers operating in the slow-light regime. We predict, based on a general symmetry analysis, that robust tunneling of slow-light pulses is possible between antisymmetrically coupled photonic crystal waveguides. We demonstrate, through Bloch mode frequencydomain and finite-difference time-domain (FDTD) simulations that, for all pulses with strongly reduced group velocities at the photonic band-gap edge, complete switching occurs at a fixed coupling length of just a few unit cells of the photonic crystal.
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