Journal
NEW JOURNAL OF PHYSICS
Volume 17, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/17/10/105004
Keywords
parity-time symmetric lattices; Floquet-Bloch modes; Rabi oscillations; power control
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Funding
- Ministry of Education and Science of the Republic of Kazakhstan [339/76-2015, 771/136-2015]
- European Union-Seventh Framework Program [FP7-REGPOT-2012-2013-1, 316165]
- Ministry of Education and Science of the Russian Federation [2-2015-007]
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We investigate wave transport properties of parity-time (PT) symmetric lattices that are periodically modulated along the direction of propagation. We demonstrate that in the regime of unbroken PT-symmetry, the system Floquet-Bloch modes may interfere constructively leading to either controlled oscillations or power absorption and unlimited amplification occurring exactly at the phase-transition point. The differential power response is affected by the overlap of the gain and loss system distribution with wave intensity pattern that is formed through Rabi oscillations engaging the coupled Floquet-Bloch modes.
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