Document Type

Article

Publication Date

2011

Abstract

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.

Comments

© 2011 American Physical Society. Original published version available at https://doi.org/10.1103/PhysRevLett.106.213901

Publication Title

Physical Review Letters

DOI

10.1103/PhysRevLett.106.213901

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