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.
Original language | English (US) |
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Article number | 014011 |
Journal | Physical Review Applied |
Volume | 12 |
Issue number | 1 |
DOIs | |
State | Published - Jul 8 2019 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2019 American Physical Society.