Tuning Two-Dimensional 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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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.

Original languageEnglish (US)
Article number014011
JournalPhysical Review Applied
Issue number1
StatePublished - Jul 8 2019

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© 2019 American Physical Society.


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