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Browsing Articole din publicaţii internaţionale by Author "TIRON, A. V."

Browsing Articole din publicaţii internaţionale by Author "TIRON, A. V."

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  • Band structure and optical constants of SnS2 single crystals 
    RUSU, E. V.; SYRBU, N. N.; TIRON, A. V.; ZALAMAI, V. V. (IOP Publishing, 2019)
    Absorption (K), reflection (R) and wavelength modulated transmission (ΔT/Δλ) spectra in SnS2 crystals of hexagonal phase (space group P63/mmc) were investigated in temperature interval from 300 to 10 K. It was established ...
  • Birefringence of SnSe single crystals in excitonic and electronic transitions region 
    ZALAMAI, V. V.; TIRON, A. V.; RUSU, E. V.; SYRBU, N. N. (IOP Publishing, 2019)
    Absorption spectra in temperature range 300–10 K were studied. The minimal band gap A1 (1.091 eV at 300 K) is formed by direct allowed in E∣∣c polarization and forbidden in E∣∣a polarizations transitions. The next interval ...
  • Excitonic spectra and birefringence in TlGaS2 single crystals 
    TIRON, A. V. (Institutul de Fizică Aplicată, AŞM, 2018)
    TlGaS2 crystals belong to triple thallium chalcogenides with well-pronounced lamellar structure. Due to specificity of crystal structure these crystals have a strong anisotropy of physical properties. The authors report ...
  • Excitonic spectra and energy band structure of ZnAl2Se4 crystals 
    SYRBU, N. N.; ZALAMAI, V. V.; TIRON, A. V.; TIGINYANU, I. M. (Elservier, 2015)
    Absorption, reflection and wavelength modulated reflection spectra were investigated in ZnAl2Se4 crystals. The energy positions of ground and excited states for three excitonic series (А, В and С) were determined. The main ...
  • Excitonic spectra and energy band structure of ZnAl2Se4 crystals 
    SYRBU, N. N.; ZALAMAI, V. V.; TIRON, A. V.; TIGINYANU, I. M. (Elsevier, 2015)
    Absorption, reflection and wavelength modulated reflection spectra were investigated in ZnAl2Se4 crystals. The energy positions of ground and excited states for three excitonic series (А, В and С) were determined. The main ...
  • Excitonic spectra of TlGaSe2 crystals 
    SYRBU, N. N.; ZALAMAI, V. V.; BEJAN, N. P.; TIRON, A. V. (Editura Academiei Romane, 2015)
    The indirect transitions in excitonic region with phonons emission in absorption spectra of TlGaSe2 crystals and ground and excited states of four excitonic series A, B, C and D were observed. The parameters of excitons ...
  • Excitonic states and electron transitions in HgGa2Se4 single crystals 
    ZALAMAI, V. V.; SYRBU, N .N.; TIRON, A. V. (Institutul de Fizică Aplicată, AŞM, 2018)
    The HgGa2Se4 crystals were grown by gas-transport method in ampoules and were plates with mirrored surfaces ~ 5x7 mm and 2 - 6 mm thickness. The plate‘s surfaces were parallel with c axis and could be recognized visually. ...
  • Excitons in TlGaSe2 crystals 
    ZALAMAI, V. V.; SYRBU, N. N.; TIRON, A. V. (Academia de Ştiinţe a Moldovei, 2014)
    TaGaSe2 semiconductors crystallize as a lamellar structure and have monoclinic lattice. One of the features of these crystals is a strong anisotropy of physical characteristics due to the specificity of the crystal structure. ...
  • Frenkel excitons and band structure in Sb2S3 single crystals 
    BERIL, S. I.; STAMOV, I. G.; TIRON, A. V.; ZALAMAI, V. V.; SYRBU, N. N. (Elservier, 2020)
    Anisotropy of optical properties of Sb2S3 single crystals was investigated at 11 and 300 K. Ground and excited states of four excitonic states (A, B, C and D) were found out. Parameters of observed excitons and bands V1 – ...
  • 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 ...
  • Optical activity induced by rare-earth ions in As2S3 glasses and KCl crystals 
    SYRBU, N.; ZALAMAI, V.; CULEAC, I.; IOVU, M.; TIRON, A. V.; BERIL, S. I.; STAMOV, I. G. (Elservier, 2019)
    Optical transmission spectra of As2S3 glass-like plates and nanolayers, undoped and doped with Sm and Pr ions have been investigated. The spectral dependences of the refractive index and glass transmission spectra, registered ...
  • Optical properties and birefringence of ZnIn2S4 layered crystals 
    STAMOV, I. G.; ZALAMAI, V. V.; SYRBU, N. N.; TIRON, A. V. (Elsevier, 2020)
    Interference spectra of layered ZnIn2S4 crystals were investigated for samples of different thicknesses (7.5–900 μm). Spectral dependences of refractive indices (na and nb) for light waves with different polarizations were ...
  • Resonance Raman Scattering in TlGaSe2 Crystals 
    SYRBU, N. N.; TIRON, A. V.; ZALAMAI, V. V.; BEJAN, N. P. (Hindawi, 2017)
    The resonance Raman scattering for geometries 𝑌(𝑌𝑋)𝑍 and 𝑌(𝑍𝑋)𝑍 at temperature 10 K and infrared reflection spectra in 𝐸 ‖ 𝑎 and 𝐸 ‖ 𝑏 polarizations at 300 K were investigated. The number of 𝐴𝑎 (𝐵𝑎) and ...
  • Оptical properties and electronic band structure of SnS single crystals 
    ZALAMAI V. V.; RUSU, E. V.; SYRBU, N. N.; TIRON, A. V. (Elservier, 2019)
    Reflection and absorption spectra of SnS single crystals (Pnma (D2h16) space group) were investigated at low and room temperatures. Features attributed to three excitonic states were found out. Parameters of excitons and ...

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