Optical properties and birefringence of ZnIn2&nbsp;S4&nbsp;layered crystals

Stamov Ivan; Zalamai Victor; Syrbu Nicolae; Tiron Andrew

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STAMOV, Ivan, ZALAMAI, Victor, SYRBU, Nicolae, TIRON, Andrew. Optical properties and birefringence of ZnIn2 S4 layered crystals. In: Journal of Physics and Chemistry of Solids, 2020, nr. 136, p. 0. ISSN 0022-3697. DOI: https://doi.org/10.1016/j.jpcs.2019.05.013

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Journal of Physics and Chemistry of Solids

Numărul 136 / 2020 / ISSN 0022-3697 /ISSNe 0022-3697

Optical properties and birefringence of ZnIn₂ S₄ layered crystals

DOI:https://doi.org/10.1016/j.jpcs.2019.05.013

Pag. 0-0

Stamov Ivan¹, Zalamai Victor², Syrbu Nicolae², Tiron Andrew²

¹ T.G. Shevchenko State University of Pridnestrovie, Tiraspol,
² Technical University of Moldova

Disponibil în IBN: 1 octombrie 2019

Rezumat

Interference spectra of layered ZnIn₂S₄ crystals were investigated for samples of different thicknesses (7.5–900 μm). Spectral dependences of refractive indices (n^a and n^b) for light waves with different polarizations were calculated and their intersection observed at energy E₀ ∼ 2.38 eV. The refractive indices difference (Δn = n^a − n^b) was determined at energy range 0.8–3.0 eV. Features observed in reflection and absorption spectra were attributed to the band-to-band electron transitions at k = 0. Magnitudes of valence bands (V₁, V₂ and V₃, V₄) splitting due to crystal field and spin–orbital interaction were determined. Electron transitions in energy interval 2–6 eV were identified on the basis of available theoretical band structure calculations.

Cuvinte-cheie
Interference spectra, Birefringence, Frenkel excitons, refractive indices, Band structure

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