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A 2 × 2 spatial optical switch based on PT-symmetry

Fakhroddin Nazari, Mina Nazari, and Mohammad Kazem Moravvej-Farshi

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Abstract

We show a PT-symmetric coupler having an arm with a tunable gain and a no-loss arm when appropriately de signed to possess reciprocal behavior, unlike its rivals having a fixed gain/loss arm, can perform as a tunable 2×2 spatial optical switch. The degree of the tunability equals the ratio of the coupler’s length to the total coupling length.

© 2011 Optical Society of America

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