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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
, B.P. Pal, R.K. Varshney, G.P. Agrawal
Published in IOP Publishing Ltd
Volume: 14
Issue: 7
We investigate the influence of the phase front curvature of an input light beam on the transverse localization of light, 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 does indeed play an important role and it could degrade the quality of light localization in a disordered dielectric structure. More specifically, a faster transition from the ballistic mode of beam propagation due to diffraction to a characteristic localized state is observed in the case of a continuous wave (CW) beam whose phase front is plane, as compared to one having a curved phase front. © 2012 IOP Publishing Ltd.
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JournalData powered by TypesetJournal of Optics (United Kingdom)
PublisherData powered by TypesetIOP Publishing Ltd