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Applied Physics Letters

Enhancing optical switching with coherent control

Sunil Sandhu, Michelle L. Povinelli, Shanhui Fan

Published Jun 7, 2010• 29 citations
Publisher

Abstract

We show that coherent control can enhance the peak pulse energy coupled into a photonic crystal (PC) resonator system. We then demonstrate two applications of this coherent control technique in a bistable PC device, namely, the reduction in input power required to switch between its bistable states and the use of phase switching to switch between its bistable states.

DOI
10.1063/1.3449572

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We show that coherent control can enhance the peak pulse energy coupled into a photonic crystal (PC) resonator system. We then demonstrate two applications of this coherent control technique in a bistable PC device, namely, the reduction in input power required to switch between its bistable states and the use of phase switching to switch between its bistable states.
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We present an analytical model and numerical experiments to describe optimal bistable switching in a nonlinear photonic crystal system. It is proved that only three parameters are needed to characterize a bistable switch: the resonant frequency omega(res), the quality factor Q, and parameter kappa that measures nonlinear "feedback strength." A photonic crystal enables the device to operate in single-mode fashion, as if it were effectively one dimensional. This provides optimal control over the input and output and facilitates further large-scale optical integration.