Refractive index database

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Optical constants of WTe2 (Tungsten ditelluride)
Munkhbat et al. 2022: multilayer flakes; n(γ) 0.30–1.69 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Conditions & Spec sheet

n_is_absolute: true
wavelength_is_vacuum: true


Multilayer flakes. nγ. Room temperature.


B. Munkhbat, P. Wrobel, T. J. Antosiewicz, T. O. Shegai. Optical constants of several multilayer transition metal dichalcogenides spectroscopic ellipsometry in the 300–1700 nm range: High index, anisotropy, and hyperbolicity, ACS Photonics 9, 2398–2407 (2022) (Numerical data kindly provided by Tomasz Antosiewicz)


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Tungsten ditelluride, WTe2

Tungsten ditelluride (WTe2) is a member of the transition metal dichalcogenides (TMDs) group, possessing unique electronic properties that set it apart from other TMDs. Characterized by its layered structure, the layers are held together by weak van der Waals forces, making it possible to exfoliate into ultra-thin layers. WTe2 has gained significant attention due to its extremely large magnetoresistance and the discovery of type-II Weyl semimetal state in its structure. The combination of these unusual properties has spurred interest in its potential for advanced electronic, spintronic, and quantum devices. Moreover, its inherent flexibility in thin layers can be advantageous for future wearable or flexible device applications.

Other names

  • Tungsten(IV) telluride

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