Low-threshold bistability of slow light in photonic-crystal waveguides

Details Low-threshold bistability of slow light in photonic-crystal waveguides Low-threshold bistability of slow light in photonic-crystal waveguides

2008-04-25

arxiv.org/abs/0804.4133v1

Optics Express, Vol. 15, Issue 19, pp. 12380-12385 (2007)

Physics

Optics

LaTeX, 6 pages, 4 figures

Scientific paper

10.1364/OE.15.012380

We analyze the resonant transmission of light through a photonic-crystal waveguide side coupled to a Kerr nonlinear cavity, and demonstrate how to design the structure geometry for achieving bistability and all-optical switching at ultra-low powers in the slow-light regime. We show that the resonance quality factor in such structures scales inversely proportional to the group velocity of light at the resonant frequency and thus grows indefinitely in the slow-light regime. Accordingly, the power threshold required for all-optical switching in such structures scales as a square of the group velocity, rapidly vanishing in the slow-light regime.

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