Refractive index database

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Optical constants of GaS (Gallium sulfide)
Kato and Umemura 2011: n(o) 0.633–10.6 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]



Room temperature. Ordinary ray (o).


K. Kato and N. Umemura. Sellmeier equations for GaS and GaSe and their applications to the nonlinear optics in GaSxSe1−x, Opt. Lett. 36, 746-747 (2011)


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Gallium sulfide, GaS

Gallium sulfide (GaS) is a binary compound with a layered structure, belonging to the family of III-VI semiconductors. It has an indirect band gap of approximately 3.0 eV and is not as commonly used as other III-V compounds like GaAs or GaN. However, GaS exhibits intriguing optoelectronic and nonlinear optical properties, making it a material of interest for specialized applications. It can be synthesized in both crystalline and thin-film forms, and it has been explored for use in photodetectors and photovoltaic cells. While not a mainstream material, GaS is the subject of ongoing research aimed at uncovering its full potential for optoelectronic applications.

Other name

  • Gallium (II) sulfide

External links