3 years ago

Electric current induced unidirectional propagation of surface plasmon-polaritons.

A. Y. Bekshaev, F. Nori, K. Y. Bliokh, F. J. Rodríguez-Fortuño, Y. S. Kivshar

Nonreciprocity and one-way propagation of optical signals is crucial for modern nanophotonic technology, and is typically achieved using magneto-optical effects requiring large magnetic biases. Here we suggest a fundamentally novel approach to achieve unidirectional propagation of surface plasmon-polaritons (SPPs) at metal-dielectric interfaces. We employ a direct electric current in metals, which produces a Doppler frequency shift of SPPs due to the uniform drift of electrons. This tilts the SPP dispersion, enabling one-way propagation, as well as zero and negative group velocities. The results are demonstrated for planar interfaces and cylindrical nanowire waveguides.

Publisher URL: http://arxiv.org/abs/1712.00291

DOI: arXiv:1712.00291v3

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