Optical constants of GeS2 (Germanium disulfide)
Slavich et al. 1989: n,k(γ) 0.299–2.04 µm
Complex refractive index (n+ik)
Derived optical constants
Conditions
direction: gamma
Comments
n(γ),k(γ). Ab initio calculations.
References
A. S. Slavich, G. A. Ermolaev, I. A. Zavidovskiy, D. V. Grudinin, K. V. Kravtsov, M. K. Tatmyshevskiy, M. S. Mironov, A. N. Toksumakov, G. I. Tselikov, I. M. Fradkin, K. V. Voronin, M. R. Povolotskiy, O. G. Matveeva, A. V. Syuy, D. I. Yakubovsky, D. M. Tsymbarenko, I. Kruglov, D. A. Ghazaryan, S. M. Novikov, A. A. Vyshnevyy, A. V. Arsenin, V. S. Volkov, K. S. Novoselov. Germanium disulfide as an alternative high refractive index and transparent material for UV-visible nanophotonics. Light Sci. Appl., 14, 213 (2025) (Numerical data kindly provided by Dr. Georgy Ermolaev)
Data
Additional information
About Germanium disulfide
Germanium disulfide (GeS2) is a chalcogenide compound known for its wide infrared transparency and high refractive index. It crystallizes in an orthorhombic structure but is often used in its amorphous (glassy) form. GeS2-based glasses are key materials in infrared optics, especially in mid-IR applications (2–10 µm), due to their low phonon energy and favorable nonlinear optical properties. These characteristics make GeS₂ a valuable component in optical fibers, lenses, and infrared sensors. It is also studied for its role in photonics, infrared transmitting windows, and as a host material in rare-earth-doped fiber amplifiers.
Other names and variations:- Germanium(IV) sulfide