Real-space simulations of the hyperbolic plasmon polaritons in 1T′ tungsten ditelluride

Chi, Yuanchen; Beery, Eric; Luan, Yilong; Wang, Jigang; Fei, Zhe

doi:10.1063/5.0258253

Real-space simulations of the hyperbolic plasmon polaritons in 1T′ tungsten ditelluride

Journal Article · Wed Aug 13 00:00:00 EDT 2025 · AIP Advances

DOI:https://doi.org/10.1063/5.0258253· OSTI ID:2586725

^[1]; Beery, Eric ^[2]; Luan, Yilong ^[3]; ^[1]; ^[1]

Ames Lab., and Iowa State Univ., Ames, IA (United States)
Ames National Laboratory, U.S. Department of Energy, Iowa State University 2 , Ames, Iowa 50011,; Department of Physics and Astronomy, Haverford College 3 , Haverford, Pennsylvania 19041,
Iowa State Univ., Ames, IA (United States); Haverford College, PA (United States)

Recent discoveries of hyperbolic surface plasmon polaritons (SPPs) in 1T′ WTe₂ have garnered significant attention in 2D materials and nanophotonics. In this study, we employ finite-element simulations to investigate the real-space characteristics of hyperbolic SPPs in thin WTe₂ flakes. Our results show that the SPPs exhibit a pronounced sensitivity to excitation energy and sample thickness. By analyzing the plasmonic field patterns, we extract key plasmonic parameters including plasmon wavelengths, hyperbolic angles, and plasmonic figures of merit. In addition, we examine SPP modes in stacked WTe₂ flakes with varying twist angles, demonstrating that the plasmonic field patterns can be effectively tuned by adjusting the twist angle. Notably, as the twist angle increases, the SPPs undergo a topological transition from open hyperbolic modes to closed elliptic modes. This twist-engineering capability offers promising potential for the development of tunable plasmonic devices based on WTe₂.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE; National Science Foundation

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 2586725

Journal Information:: AIP Advances, Journal Name: AIP Advances Journal Issue: 8 Vol. 15; ISSN 2158-3226

Publisher:: AIP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Real-space simulations of the hyperbolic plasmon polaritons in 1T′ tungsten ditelluride

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