Document Type

Article

Publication Date

9-1-2016

Abstract

We propose a mechanism for directional excitation without breaking reciprocity. This is achieved by embedding an impedance matched parity-time symmetric potential in a three-port system. The amplitude distribution within the gain and loss regions is strongly influenced by the direction of the incoming field. Consequently, the excitation of the third port is contingent on the direction of incidence while transmission in the main channel is immune. Our design improves the four-port directional coupler scheme, as there is no need to implement an anechoic termination to one of the ports.

Comments

© New Journal of Physics. Original version available at: http://doi.org/10.1088/1367-2630/18/9/095001

Publication Title

New Journal of Physics

DOI

10.1088/1367-2630/18/9/095001

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