“School of Physics”

Back to Papers Home
Back to Papers of School of Physics

Paper   IPM / P / 16177
School of Physics
  Title:   Tunable and low-loss hyperbolic plasmon polaritons in Td -WTe2 single layer
1.  Z. Torbatian
2.  D. Novko
3.  R. Asgari
  Status:   Published
  Journal: Phys. Rev. Applied
  Vol.:  14
  Year:  2020
  Pages:   044014
  Supported by:  IPM
Natural hyperbolic two-dimensional systems are fascinating new class of materials that could open new pathways to manipulate plasmon propagation and light-matter interactions. Here, we present a comprehensive study of optical response in Td -WTe2 by means of density functional, and many-body perturbation theories. We show how monolayer WTe2 with in-plane anisotropy sustains hyperbolic plasmon polaritons, which can be tuned via chemical doping and strain. The latter is able to extend the hyperbolic regime towards near-infrared with low losses. Moreover, with a moderate strain, WTe2 can even be switched between elliptic and hyperbolic regimes. In addition, plasmons in WTe2 are charaterized with low losses owing to electron-phonon scatterings, which are responsible for the temperature dependence of plasmon linewidth. Interestingly, temperature can also be utilized to tune in-plane anisotropy of WTe2 optical response.

Download TeX format
back to top
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
scroll left or right