Highly directional and carrier density-independent plasmons in quasi-one-dimensional electron gas systems

Recent advancements in developing metahyperbolic surfaces through substrate patterning have enabled the realization of highly-directional hyperbolic surface plasmons, but the feasibility of reproducing the same properties in natural hyperbolic two-dimensional (2D) materials is still unexplored. In t...

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Bibliographic Details
Published in:Communications physics 2023-11, Vol.6 (1), p.342-9, Article 342
Main Authors: Gao, Han, Zhang, Xuejin, Ding, Chao, Ma, Xikui, Wang, Mingzheng, Li, Yangyang, Zhao, Mingwen
Format: Article
Language:English
Subjects:
639/766/400/1021
639/925/357/1018
Anisotropy
Broadband
Carrier density
Design
Electron gas
Electrons
First principles
Graphene
Monolayers
Optoelectronic devices
Physics
Physics and Astronomy
Plasmons
Principles
Substrates
Two dimensional materials
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Summary:Recent advancements in developing metahyperbolic surfaces through substrate patterning have enabled the realization of highly-directional hyperbolic surface plasmons, but the feasibility of reproducing the same properties in natural hyperbolic two-dimensional (2D) materials is still unexplored. In this study, we expand the possibility of natural 2D materials in achieving electromagnetic scenarios akin to those observed in metahyperbolic surfaces. Natural hyperbolic 2D materials provide inherent advantages for simplicity, predictability, and lower losses compared to meta-surfaces. By employing first-principles calculations, we find that realistic 2D material, specifically the RuOCl 2 monolayer, are suitable alternatives to metahyperbolic surfaces. Indeed, RuOCl 2 monolayer sustains carrier-density-independent and broadband low-loss hyperbolic responses across the terahertz to ultraviolet spectral range, owning to the highly-anisotropic electronic band structures characterized by quasi-one-dimensional electron gas. These findings shed light on the integration of hyperbolicity in natural 2D materials, opening new avenues for the design and development of optoelectronic devices and nanoscale imaging systems. Highly-directional hyperbolic surface plasmons are widely exploited in optoelectronic devices, but obtaining the same performance in simpler platforms over metahyperbolic surfaces has technological advantages for integration. The authors predict that RuOCl 2 monolayers exhibit low-loss hyperbolic responses across the THz to UV spectral range.
ISSN:2399-3650
2399-3650
DOI:10.1038/s42005-023-01456-x