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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 15 — Jul. 28, 2014
  • pp: 18401–18411

Anisotropic reflection oscillation in periodic multilayer structures of parity-time symmetry

Xue-Feng Zhu, Yu-Gui Peng, and De-Gang Zhao  »View Author Affiliations

Optics Express, Vol. 22, Issue 15, pp. 18401-18411 (2014)

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We show that periodic multilayer structures with parity-time (PT) symmetries imposed by a balanced arrangement of gain and loss can exhibit anisotropic reflection oscillation patterns as the number of unit-cells is increasing. At the minima of reflection oscillation patterns, the PT symmetric medium exhibits bidirectional transparency with the eigenvalues of the scattering matrix degenerated, where the PT symmetric set-up can still render directional responses due to the one-way field localization inside the system. With certain number of unit-cells, the PT symmetric crystal is unidirectionally invisible. More complicated reflection/transmission oscillations can be observed by segregating neighboring unit-cells with a uniform dielectric layer. Our results may pave the way towards a new class of functional optical devices with intriguing and unexpected directional responses.

© 2014 Optical Society of America

OCIS Codes
(310.4165) Thin films : Multilayer design
(290.5839) Scattering : Scattering, invisibility

ToC Category:

Original Manuscript: May 30, 2014
Revised Manuscript: July 7, 2014
Manuscript Accepted: July 8, 2014
Published: July 22, 2014

Xue-Feng Zhu, Yu-Gui Peng, and De-Gang Zhao, "Anisotropic reflection oscillation in periodic multilayer structures of parity-time symmetry," Opt. Express 22, 18401-18411 (2014)

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