Journal
OPTICS COMMUNICATIONS
Volume 265, Issue 1, Pages 171-174Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2006.03.031
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The switching speed of conventional silicon-based optical switching devices based on plasma dispersion effect is limited by the lifetime of free carriers which introduce either phase or absorption changes. Here we report an all-optical logic NOR gate which does not rely on free carriers but instead uses two-photon absorption. High speed operation was achieved using pump induced non-degenerate two-photon absorption inside the submicron size silicon wire waveguides. The device required low pulse energy (few pJ) for logic gate operation. (c) 2006 Elsevier B.V. All rights reserved.
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