Condensed Matter Physics Seminar

Thursday, September 30, 1999, 2 p.m.
Plant Sciences Building, Room 1130

Localization in Optics: Theory and Experiment

Shmuel Fishman

(Technion, Israel)

Abstract:  A first experimental realization of an optical ``kicked'' system is presented.  It exhibits localization analogous to that of the quantum ``kicked-rotor''.  In the experiment, free space propagating light is periodically kicked by thin sinusoidal phase gratings, which produce high order diffractions and tend to increase the spatial frequency band.  The wave property suppresses this diffusive spread. The localization is realized in a regime near antiresonance of the system, which was also studied theoretically.  The behavior in this regime is similar to that of electronic motion in incommensurate potentials.  A crucial part of the experiment is the grating in-phase positioning, which is done by using the Talbot effect.  If time permits, a special effect of localization in the temporal frequency domain of light pulses which propagate in a dispersive single mode fiber, in presence of a time periodic phase modulation that is repeatedly applied at equidistant locations along the fiber, will be presented.

Host: Richard Prange

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