Determination of the dielectric function of MnIn2S4 single crystals by spectroscopic ellipsometry

► Dielectric function of MnIn2S4 single crystals was measured from 0.7 to 4.7 eV. ► Optical constants (n and k, α and R) for MnIn2S4 were determined. ► Fundamental gap and high-frequency dielectric constant were evaluated.