Time-reversal in dynamically-tuned zero-gap periodic systems
arXiv:1104.4635 · doi:10.1103/PhysRevLett.106.193902
Abstract
We show that short pulses propagating in zero-gap periodic systems can be reversed with 100% efficiency by using weak non-adiabatic tuning of the wave velocity at time-scales that can be much slower than the period. Unlike previous schemes, we demonstrate reversal of {\em broadband} (few cycle) pulses with simple structures. Our scheme may thus open the way to time-reversal in a variety of systems for which it was not accessible before.
Accepted for publication in Phys. Rev. Letters
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