Standing and Moving Gap Solitons in Resonantly Absorbing Gratings

Details Standing and Moving Gap Solitons in Resonantly Absorbing Gratings Standing and Moving Gap Solitons in Resonantly Absorbing Gratings

1998-09-20

arxiv.org/abs/patt-sol/9809010v1

PR L VOLUME 81 PAGE 3647, 1998

Nonlinear Sciences

Pattern Formation and Solitons

4 pages, RevTeX. To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.81.3647

We present hitherto unknown forms of soliton dynamics in the forbidden frequency gap of a Bragg reflector, modified by periodic layers of near-resonant two-level systems (TLS). Remarkably, even extremely low TLS densities create an allowed band within the forbidden gap. This spectrum gives rise, for any Bragg reflectivity, to a vast family of stable gap solitons, both standing and moving, having a unique analytic form, an arbitrary pulse area, and inelastic collision properties. These findings suggest new possibilities of transmission control, noise filtering or ``dynamical cavities'' (self-traps) for both weak and strong signal pulses.

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