Refractive index database

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Optical constants of MoTe2 (Molybdenum ditelluride)
Munkhbat et al. 2022: multilayer flakes; n(e) 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. Out-of-plane (extraordinary ray, e). 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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Molybdenum ditelluride, MoTe2

Molybdenum ditelluride (MoTe2) is a member of the transition metal dichalcogenides (TMDs) family, characterized by its layered structure. Each layer comprises a plane of molybdenum atoms situated between two planes of tellurium atoms. These layers are bound by weak van der Waals forces, enabling easy exfoliation into individual layers or few-layered structures. Like other TMDs, MoTe2 undergoes a change in electronic properties when thinned down to a monolayer; it transitions from an indirect to a direct bandgap semiconductor. Due to this unique property and its high electron mobility, MoTe2 is a material of significant interest in nanoelectronics, optoelectronics, and for potential applications in field-effect transistors, photodetectors, and other advanced electronic devices.

Other names

  • Bis(tellanylidene)molybdenum
  • molybdenum(IV) telluride
  • molybdenum telluride

External links