Refractive index database

nk database   |   n2 database   |   about




Optical constants of TaSe2 (Tantalum diselenide)
Munkhbat et al. 2022: multilayer flakes; n,k(o) 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. In-plane (ordinary ray, o). 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)


[CSV - comma separated]   [TXT - tab separated]   [Full database record]


Tantalum diselenide, TaSe2

Tantalum diselenide (TaSe2) is a member of the transition metal dichalcogenides (TMDs) family, possessing unique electrical and optical characteristics. Like its sulfide counterpart, TaSe2 undergoes charge density wave (CDW) transitions, leading to complex electronic behaviors such as superconductivity in certain conditions. The material's layered structure allows for exfoliation into thin sheets, paving the way for potential applications in nanoelectronics and optoelectronics. Furthermore, TaSe2's intriguing properties, including its responses to external stimuli like pressure and field, make it a popular candidate for studying exotic quantum states and phase transitions.

Other names

  • Tantalum(IV) selenide
  • Tantalum(IV) diselenide
  • Tantalum selenide

External links