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Interference of ordinary and extraordinary waves in AgAsS2 crystals

N.N. Syrbu - No affiliation found

2012/09/01 Full-length article DOI: 10.1016/j.physb.2012.04.040 Journal: Physica B: Condensed Matter

Abstract:

AbstractThe anisotropy of the near-bandgap absorption is investigated in AgAsS2 crystals. The refraction indices, n‖ and n⊥ respectively for the E‖c and E⊥c polarizations as well as the spectral dependence of the refraction indices difference, Δn=n‖−n⊥ are determined from the interference spectra of AgAsS2 crystals. A transmission band with four maxima is observed in the transmission spectra of crystals placed between crossed polarizers. The optical parameters n, k, ε1, and ε2 for the E‖c and E⊥c polarizations are calculated from the reflection spectra by using the Kramers–Kronig relations.