Refractive index database

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Optical constants of TaS2 (Tantalum disulfide)
Munkhbat et al. 2022: multilayer flakes; n,k(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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Tantalum disulfide, TaS2

Tantalum disulfide (TaS2) is a layered transition metal dichalcogenide with intriguing electrical and optical properties. It's known for its charge density wave (CDW) transitions, which can lead to various electronic states, such as metallic, insulating, and superconducting phases. This material is also of considerable interest in the research community for its potential in miniaturized electronic devices and as a platform for studying correlated electron systems. The thin layers of TaS2 can be exfoliated, making it a candidate for use in nanoscale electronic and optoelectronic applications. The compound's unique electronic properties also make it a subject of interest in the exploration of novel quantum phenomena.

Other names

  • Tantalum(IV) sulfide

External links