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Optics Letters

Optics Letters


  • Vol. 28, Iss. 24 — Dec. 15, 2003
  • pp: 2506–2508

All-optical transistor action with bistable switching in a photonic crystal cross-waveguide geometry

Mehmet Fatih Yanik, Shanhui Fan, Marin Soljačić, and J. D. Joannopoulos  »View Author Affiliations

Optics Letters, Vol. 28, Issue 24, pp. 2506-2508 (2003)

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We demonstrate all-optical switching action in a nonlinear photonic crystal cross-waveguide geometry with instantaneous Kerr nonlinearity, in which the transmission of a signal can be reversibly switched on and off by a control input. Our geometry accomplishes both spatial and spectral separation between the signal and the control in the nonlinear regime. The device occupies a small footprint of a few micrometers squared and requires only a few milliwatts of power at a 10-Gbit/s switching rate by use of Kerr nonlinearity in AlGaAs below half the electronic bandgap. We also show that the switching dynamics, as revealed by both coupled-mode theory and finite-difference time domain simulations, exhibits collective behavior that can be exploited to generate high-contrast logic levels and all-optical memory.

© 2003 Optical Society of America

OCIS Codes
(130.3750) Integrated optics : Optical logic devices
(130.4310) Integrated optics : Nonlinear
(190.1450) Nonlinear optics : Bistability
(230.4110) Optical devices : Modulators
(230.5750) Optical devices : Resonators

Mehmet Fatih Yanik, Shanhui Fan, Marin Soljačić, and J. D. Joannopoulos, "All-optical transistor action with bistable switching in a photonic crystal cross-waveguide geometry," Opt. Lett. 28, 2506-2508 (2003)

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