Interference of ordinary and extraordinary waves in AgAsS2 crystals |
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| Authors: | NN Syrbu IG Stamov VV Ursaki V Parvan Yu Ivanenco |
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| Institution: | 1. Technical University of Moldova, 168 Stefan cel Mare Avenue, 2004 Chisinau, Republic of Moldova;2. Tiraspol State Corporative University, Lablocikin Street 5, 2069 Tiraspol, Republic of Moldova;3. Institute of Applied Physics, Academy of Sciences of Moldova, 5 Academy Street, 2028 Chisinau, Republic of Moldova |
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| Abstract: | The 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. |
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| Keywords: | Birefringence Ordinary wave Extraordinary wave Polarization Optical absorption Optical reflection Interference |
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