Time reversal in dynamically tuned zero-gap periodic systems.
نویسندگان
چکیده
We show that short pulses propagating in zero-gap periodic systems can be reversed with 100% efficiency by using weak nonadiabatic tuning of the wave velocity at time scales that can be much slower than the period. Unlike previous schemes, we demonstrate reversal of 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.
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عنوان ژورنال:
- Physical review letters
دوره 106 19 شماره
صفحات -
تاریخ انتشار 2011