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arXiv · 1812.03062

Tuning 2D hyperbolic plasmons in black phosphorus

Edo van Veen·Andrei Nemilentsau·Anshuman Kumar·Rafael Roldán·Mikhail I. Katsnelson·Tony Low·Shengjun Yuan
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Abstract

Black phosphorus presents a very anisotropic crystal structure, making it a potential candidate for hyperbolic plasmonics, characterized by a permittivity tensor where one of the principal components is metallic and the other dielectric. Here we demonstrate that atomically thin black phosphorus can be engineered to be a hyperbolic material operating in a broad range of the electromagnetic spectrum from the entire visible spectrum to ultraviolet. With the introduction of an optical gain, a new hyperbolic region emerges in the infrared. The character of this hyperbolic plasmon depends on the interplay between gain and loss along the two crystalline directions.

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Edo van Veen, Andrei Nemilentsau, Anshuman Kumar, Rafael Roldán, Mikhail I. Katsnelson, Tony Low, Shengjun Yuan. 2018-12-07. Tuning 2D hyperbolic plasmons in black phosphorus. https://doi.org/10.1103/physrevapplied.12.014011

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