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Transverse localization of light and its dependence on the phase-front curvature of the input beam in a disordered optical waveguide lattice

We investigate the influence of the phase-front curvature of an input light beam on the transverse localization of light by choosing an evanescently coupled disordered one-dimensional semi-infinite waveguide lattice as an example. Our numerical study reveals that a finite phase front curvature of the input beam indeed plays an important role and it could degrade the quality of light localization in a disordered dielectric structure. More specifically, a faster transition from ballistic mode of beam propagation due to diffraction to a characteristic localized state is observed in case of a continuous wave (CW) beam, whose phase-front is plane as compared to one having a curved phase front.

preprint2012arXivOpen access
S GhoshB P PalR K VarshneyG P Agrawal
physics.optics
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Open access4 authors1 topic
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S GhoshB P PalR K VarshneyG P Agrawal

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