We show that complex PT-symmetric photonic lattices can lead to a new class of self-imaging Talbot effects. For this to occur, we find that the input field pattern has to respect specific periodicities dictated by the symmetries of the system. While at the spontaneous PT-symmetry breaking point the image revivals occur at Talbot lengths governed by the characteristics of the passive lattice, at the exact phase it depends on the gain and loss parameter, thus allowing one to control the imaging process. Â© 2012 American Physical Society.
Hamidreza Ramezani, et. al., (2012) PT-symmetric talbot effects.Physical Review Letters109:3. DOI: http://doi.org/10.1103/PhysRevLett.109.033902
Physical Review Letters