Time Reversal of Light with Linear Optics and Modulators

Mehmet Fatih Yanik, Shanhui Fan
2004 Physical Review Letters  
We introduce a new physical process that can perform a complete time-reversal operation on any electromagnetic pulse. The process uses only small refractive index modulations of linear optical elements. No nonlinear multiphoton effects such as four-wave mixing are required. The introduced process can be implemented on chip with standard semiconductor materials. Furthermore, the same process can be used to compress or expand the spectrum of electromagnetic waves while completely preserving the
more » ... ly preserving the coherent information. We exhibit the time-reversal process by first-principles simulations of microcavity complexes in photonic crystals.
doi:10.1103/physrevlett.93.173903 pmid:15525079 fatcat:et4lt4cctfaazg5lw4fbszr6om