黑磷
表面等离子体子
物理
光电子学
局域表面等离子体子
作者
Edo van Veen,Andrei Nemilentsau,Anshuman Kumar,Rafael Roldán,Mikhail I. Katsnelson,Tony Low,Shengjun Yuan
出处
期刊:arXiv: Materials Science
日期:2018-12-07
被引量:33
标识
DOI:10.1103/physrevapplied.12.014011
摘要
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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