Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.213901
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Funding
- AFOSR [FA 9550-10-1-0433, FA9550-10-1-0561]
- US-Israel Binational Science Foundation, Jerusalem, Israel
- Direct For Computer & Info Scie & Enginr
- Division Of Computer and Network Systems [0959856] Funding Source: National Science Foundation
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Parity-time (PT) symmetric periodic structures, near the spontaneous PT-symmetry breaking point, can act as unidirectional invisible media. In this regime, the reflection from one end is diminished while it is enhanced from the other. Furthermore, the transmission coefficient and phase are indistinguishable from those expected in the absence of a grating. The phenomenon is robust even in the presence of Kerr nonlinearities, and it can also effectively suppress optical bistabilities.
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