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Conference on Lasers and Electro-Optics

From stopping light to all-optical signal processing; leveraging coherent light-matter interactions

Connie J. Chang-Hasnain

Published Jan 1, 2005• 0 citations
Publisher

Abstract

All-optical devices including optical buffers, wavelength converters, optical logic gates and ultra-low Vpi optical modulators can be enabled by leveraging coherent light-matter interactions to create tailorable dispersion characteristics in semiconductors. Recent advances will be discussed.
DOI
10.1109/cleo.2005.202417

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We show that light pulses can be stopped and stored all-optically, with a process that involves an adiabatic and reversible pulse bandwidth compression occurring entirely in the optical domain. Such a process overcomes the fundamental bandwidth-delay constraint in optics, and can generate arbitrarily small group velocities for any light pulse with a given bandwidth, without the use of any coherent or resonant light-matter interactions. We exhibit this process in optical resonator systems, where the pulse bandwidth compression is accomplished only by small refractive index modulations performed at moderate speeds. The optically achievable ultra low speeds can also generate extremely large non-linearities using non-resonant interactions, and thus enable decoherence-free single photon quantum gates.
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