Negative Refraction and Planar Focusing Based on Parity-Time Symmetric Metasurfaces

We introduce a new mechanism to realize negative refraction and planar focusing using a pair of parity-time symmetric metasurfaces. In contrast to existing solutions that achieve these effects with negative-index metamaterials or phase conjugating surfaces, the proposed parity-time symmetric lens enables loss-free, all-angle negative refraction and planar focusing in free space, without relying on bulk metamaterials or nonlinear effects. This concept may represent a pivotal step towards loss-free negative refraction and highly efficient planar focusing by exploiting the largely uncharted scattering properties of parity-time symmetric systems.


Published in:
Physical Review Letters, 113, 2
Year:
2014
Publisher:
American Physical Society
ISSN:
1079-7114
Laboratories:




 Record created 2016-11-21, last modified 2018-09-13


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