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Browsing Articole din publicaţii internaţionale by Author "PARVAN, V. I."

Browsing Articole din publicaţii internaţionale by Author "PARVAN, V. I."

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  • The band structure of birefractive CdGa2S4 crystals 
    STAMOV, I. G.; SYRBU, N. N.; PARVAN, V. I.; ZALAMAI, V. V.; TIGINYANU, I. M. (Elservier, 2013)
    In this paper, we report on the spectral dependence of Δn=no−ne for CdGa2S4 single crystals for shorter and longer wavelengths than the isotropic wavelength λ0=485.7nm (300K). It was established that Δn is positive at λ>λ0 ...
  • Band structure of CdAl2S4 crystals 
    ZALAMAI, V. V.; SYRBU, N. N.; PARVAN, V. I.; SVECHKIN, N. (Institutul de Fizică Aplicată, 2016)
    Reflection and wavelength modulated reflection spectra were investigated at temperature 10 K in CdAl2S4 crystals. Ground and excited states of three excitonic series (A, B and C) were found out. Contours of reflection ...
  • Energy band structure and Frenkel excitons in PbGa2S4 
    STAMOV, I. G.; SYRBU, N. N.; URSAKI, V. V.; PARVAN, V. I.; ZALAMAI, V. V. (ELSEVIER, 2012)
    Optical reflection spectra are measured and calculated in PbGa2S4 crystals in the region of resonances related to excitons with large oscillator strength and binding energy (Frenkel excitons). The splitting of the upper ...
  • Excitonic spectra and band structure of CdGa2Se4 birefractive crystals 
    SYRBU, N. N.; STAMOV, I. G.; PARVAN, V. I.; ZALAMAI, V. V.; TIGINYANU, I. M. (Elservier, 2013)
    We report on the intersection of spectral dependences of refractive indices no and ne at the wavelengths 546nm (λ0) and 450nm (λ01) in CdGa2Se4 single crystals. The value of difference Δn=ne−no is equal to zero at the ...
  • Frenkel excitons and the energy bands structure in crystals PbGa2S4 
    STAMOV, I. G.; SYRBU, N. N.; URSAKI, V. V.; PARVAN, V. I.; ZALAMAI, V. V. (Institutul de Fizică Aplicată al AŞM, 2012)
    On the basis of lead tiogalat (PbGa2S4) was created the active elements for lasers which allow to control the generation spectroscopic properties of lasers and parameters of the laser radiation. In these crystals were found ...
  • Interference of birefractive waves in CdGa2S4 crystals 
    SYRBU, N. N.; TIRON, A. V.; PARVAN, V. I.; ZALAMAI, V. V.; TIGINYANU, I. M. (Elservier, 2015)
    In СdGа2S4 crystals the Fabry–Perot and birefringence interference spectra were investigated. Spectral dependences of refraction indexes for ordinary (no) and extraordinary (ne) light waves are defined. The spectral ...
  • Large oscillator strength excitons in PbGa2S4 crystals 
    SYRBU, N. N.; PARVAN, V. I.; URSAKI, V. V. (ELSEVIER, 2012)
    Exciton states with a large oscillator strength (transverse–longitudinal splitting of 50meV) and binding energy of 290meV have been observed in PbGa2S4 crystals. The ground exciton states are stable up to the room temperature. ...

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