Authors: O A Egorov R Iliew C Etrich K Staliunas F Lederer
Publish Date: 2011/07/21
Volume: 104, Issue: 3, Pages: 537-
Abstract
We present a detailed study of the dynamics of light in passive nonlinear resonators with shallow and deep intracavity periodic modulation of the refractive index in both longitudinal and transverse directions of the resonator We investigate solutions localized in the transverse direction socalled Bloch cavity solitons by means of envelope equations for underlying linear Bloch modes and solving Maxwell’s equations directly Using a roundtrip model for forward and backward propagating waves we review different types of Bloch cavity solitons supported by both focusing at normal diffraction and defocussing at anomalous diffraction nonlinearities in a cavity with a weakcontrast modulation of the refractive index Moreover we identify Bloch cavity solitons in a Kerrnonlinear allphotonic crystal resonator solving Maxwell’s equations directly In order to analyze the properties of Bloch cavity solitons and to obtain analytical access we develop a modified meanfield model and prove its validity In particular we demonstrate a substantial narrowing of Bloch cavity solitons near the zerodiffraction regime Adjusting the quality factor and resonance frequencies of the resonator optimal Bloch cavity solitons in terms of width and pump energy are identified
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