期刊
OPTICS LETTERS
卷 40, 期 12, 页码 2758-2761出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.40.002758
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资金
- Fundacao para a Ciencia e a Tecnologia (FCT) [PTDC/FIS-OPT/1918/2012]
- National Natural Science Foundation of China (NSFC) [11474099, 11475063]
- Program of Introducing Talents of Discipline to Chinese Universities [B12024]
- Fundação para a Ciência e a Tecnologia [PTDC/FIS-OPT/1918/2012] Funding Source: FCT
We address the propagation of light in a parity-time (PT) symmetric quasi-periodic optical lattice. We show that the PT-symmetry breaking threshold of the system depends on the relative strength of two simple lattices forming quasi-periodic structure. The increase of the imaginary part of such structure leads to a dynamical phase transition from delocalization to re-localization for all eigenmodes. The nontrivial interplay between PT-symmetry breaking and the delocalization-localization transition in the system opens new prospects for the manipulation of dynamical evolution of light beams. (C) 2015 Optical Society of America
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