Refractive index database

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Optical constants of HfSe2 (Hafnium diselenide)
Zotev et al. 2023: n,k(e) 0.36–1.0 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 crystals. Out-of-plane (extraordinary ray, e). Room temperature.


P. G. Zotev, Y. Wang, D. Andres-Penares, T. Severs-Millard, S. Randerson, X. Hu, L. Sortino, C. Louca, M. Brotons-Gisbert, T. Huq, S. Vezzoli, R. Sapienza, T. F. Krauss, B. D. Gerardot, A. I. Tartakovskii. Van der Waals materials for applications in nanophotonics, Laser and Photonics Rev. 17, 2200957 (2023) (Numerical data kindly provided by Panaiot Zotev)


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Hafnium diselenide, HfSe2

Hafnium diselenide (HfSe2) is a layered transition metal dichalcogenide known for its intriguing electronic and optical properties. It crystallizes in a hexagonal structure, akin to other materials in its class, such as molybdenum disulfide (MoS2). Notably, HfSe2 exhibits a narrow indirect bandgap, which makes it a subject of interest for semiconductor applications in nanoelectronics and optoelectronics. Its layered nature allows for exfoliation into thin films or even monolayers, providing a platform for exploring two-dimensional material physics and enabling potential applications in flexible and transparent devices. In addition to its electronic properties, HfSe2 has been studied for its thermal stability and mechanical strength, which further enhance its appeal in various technological applications. However, the optical properties, particularly its refractive index, are less explored compared to its electronic characteristics. The refractive index of HfSe2 is crucial for designing optical components like waveguides and photodetectors, where precise control over light-matter interaction is essential. As research in this material progresses, understanding and tabulating its refractive index across different wavelengths will provide valuable insights for both fundamental studies and practical applications.

Other names

  • Bis(selanylidene)hafnium
  • Hafnium selenide

External links