Refractive index database

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Optical constants of ZnS (Zinc sulfide)
Amotchkina et al, 2020: n 0.4–14 µm, k 0.4–1.0 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]


Conditions & Spec sheet

n_is_absolute: false
wavelength_is_vacuum: false
substrate: Ge
film_thickness: 1.00e-6


1.008 µm ZnS film deposited on 3 mm thick Ge substrate by e-beam evaporation at 120 °C substrate temperature.


T. Amotchkina, M. Trubetskov, D. Hahner, V. Pervak, Characterization of e-beam evaporated Ge, YbF3, ZnS, and LaF3 thin films for laser-oriented coatings, Appl. Opt. 59, A40-A47 (2020) (Data kindly provided by Tatiana Amotchkina [data] [description])


[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]


Zinc sulfide, ZnS

Zinc sulfide (ZnS) is a semiconducting material that exhibits either a sphalerite (cubic) or wurtzite (hexagonal) crystal structure. It has a direct bandgap of around 3.68 eV for the cubic form and 3.91 eV for the hexagonal form. Due to its luminescent properties, ZnS has been extensively used in applications like electroluminescent panels, X-ray screens, and phosphorescent materials. Doped ZnS, especially with copper or silver, can produce phosphorescent materials widely used in various displays. ZnS is also employed as a host matrix in many quantum dot applications. Additionally, its infrared transmission capability makes it valuable for infrared optics, and it's frequently used in infrared windows and lenses.

Other names

  • Zinc sulphide
  • Zinc blende (cubic ZnS)


  • Sphalerite (mineral of cubic ZnS)
  • Wurtzite (mineral of hexagonal ZnS)

External links