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The in-plane structural anisotropy in low-symmetric layered compound rheniumdisulfide ($\text{ReS}_2$) makes it a candidate to host and tuneelectromagnetic phenomena specific for anisotropic media. In particular,optical anisotropy may lead to the appearance of hyperbolic plasmons, a highlydesired property in optoelectronics. The necessary condition is a stronganisotropy of the principal components of the dielectric function, such that atsome frequency range, one component is negative and the other is positive,i.e., one component is metallic, and the other one is dielectric. Here, westudy the effect of anisotropy in $\text{ReS}_2$ and show that it can be anatural material to host hyperbolic plasmons in the ultraviolet frequencyrange. The operating frequency range of the hyperbolic plasmons can be tunedwith the number of $\text{ReS}_2$ layers.

Possible realization of hyperbolic plasmons in a few-layered rhenium disulfide