Journal
OPTICS LETTERS
Volume 36, Issue 16, Pages 3290-3292Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.003290
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Funding
- Natural Science Foundation of Guangdong Province, China [10151063101000017]
- Key Laboratory for High Power Laser Physics of Chinese Academy of Sciences (CAS) [SG-001103]
- National Natural Science Foundation of China (NSFC) [10904041, 10974061]
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We numerically study the gray solitons in parity-time (PT) symmetric potentials. Simulated results show that there are two kinds of gray solitons, the dip-shaped gray solitons and the hump-shaped solitons, and both of them can be stable. Hump-shaped solitons can always exist, but the grayness of a stable dip-shaped gray soliton should exceed a threshold value. More interesting, it is discovered that when propagating in PT symmetric potentials, the gray solitons have no transverse deviation, and this is a phenomenon different from the usual gray solitons. (C) 2011 Optical Society of America
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