Optically switchable directional invisibility

It is shown that a scatterer can be designed to be directionally invisible for an incident field composed of a given sum of plane waves. These scatterers are invisible only when all plane waves are present with the given amplitudes and directions of incidence, which suggests a new type of "swit...

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Bibliographic Details
Published in:Optics letters 2017-04, Vol.42 (7), p.1301-1304
Main Authors: Hurwitz, Elisa, Gbur, Greg
Format: Article
Language:English
Subjects:
Amplitudes
Couplers
Devices
Gain-Loss
Object recognition
Plane waves
Switches
Visibility
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Summary:It is shown that a scatterer can be designed to be directionally invisible for an incident field composed of a given sum of plane waves. These scatterers are invisible only when all plane waves are present with the given amplitudes and directions of incidence, which suggests a new type of "switchable" invisibility. Such objects could find application in optical devices such as couplers, switches, and optical position sensors. It is also demonstrated that the designed scatterers have balanced gain-loss profiles that are more general than most PT-symmetric objects considered so far.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.42.001301