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Nonlinear Guided Waves and Their Applications

Coherent Effects in Bragg Reflectors: Light Localization and Oscillating Solitary Waves near Absorption Resonance

Igor V. Mel’nikov, Michael Scalora, C. M. Bowden

Published Jan 1, 2001• 0 citations
Publisher

Abstract

We show that both the Dicke superradiance and pulse amplification in near-resonance Bragg structure can produce light localization in the bandgap of such structures. This localization is accompanied by formation of a principally new type of gap soliton.
DOI
10.1364/nlgw.2001.mc25

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A practical method of slowing and stopping an incident ultrashort light pulse with a resonantly absorbing Bragg reflector is demonstrated numerically. It is shown that an incident laser pulse with suitable pulse area evolves from a given pulse waveform into a stable, spatially-localized oscillating or standing gap soliton. We show that multiple gap solitons can be simultaneously spatially localized, resulting in efficient optical energy conversion and storage in the resonantly absorbing Bragg structure as atomically coherent states.
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We consider an optical pulse propagation in a one-dimensional nonlinear periodic structure doped uniformly with inhomogeneously broadening two-level atoms wherein the pulse propagation is governed by the nonlinear coupled mode-Maxwell Bloch equations. We investigate the pulse-train like periodic waves as well as bright and dark solitons near the photonic bandgap structure under the influence of self-induced transparency (SIT) effect. Further, we demonstrate that the resulting bright and dark SIT Bragg solitons may be realized both in anomalous and normal dispersion regimes, and this novel concept is ultimately the crux of this paper.