Articole ştiinţifice: Recent submissions

  • Vibrational modes of CuAl/sub 1-x/Ga/sub x/Se/sub 2/ solid solution 
    SYRBU, N. N.; BOGDANASH, M.; TEZLEVAN, V. E. (IEEE, 1996)
    In the present paper new results of Raman scattering of CuAl/sub 1-x/Ga/sub x/Se/sub 2/ crystals by the unpolarized light at 77 K are presented. IR reflectivity spectra of this solid solution have been investigated for ...
  • Vibrational modes in ZnAl2S4 and CdIn2S4 crystals 
    SYRBU, N. N.; BOGDANASH, M.; MOLDOVYAN, N. A. (Elservier, 1996)
    Infrared reflectivity spectra and Raman scattering of the ZnAl2S4 and CdIn2S4 crystals have been investigated. Reflectivity spectra contours were calculated and phonon parameters and dielectric constants were determined. ...
  • Vibrational and Polariton Spectra of CdGa2S4 and CdAl2S4 Crystals 
    SYRBU, N. N.; NEMERENCO, L. L.; COJOCARU, O. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2002)
    In this work the vibrational and polariton optical spectra of the CdGa2S4 and CdAl2S4 crystals grown from vapor phase and by the Bridgman method have been investigated. The light scattering by polaritons excited of various ...
  • Urbach's tail in the absorption spectra of CuIn5Se8 and CuGa3Se5 single crystals 
    ARUSHANOV, E.; LEVCENKO, S.; SYRBU, N. N.; NATEPROV, A.; TEZLEVAN, V.; MERINO, J. M.; LEÓN, M. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2006)
    Optical absorption spectra of CuIn5Se8 and CuGa3Se5 single crystals grown by chemical vapour transport were investigated in the range of 10–300 K. The logarithmic variation of the absorption coefficient with photon energy ...
  • Up-conversion luminescence in samarium doped ZnAl2Se4 single crystals 
    ZALAMAI, V. V.; SYRBU, N. N.; RUSU, E. V.; TIRON, A.; BEJAN, N. P. (IOP Publishing, 2018)
    Photoluminescence spectra of ZnAl2Se4:Sm2+ due to the processes of charge carriers recombination from levels 5Dj, 5Lj, 5Gj and 5Hj (4f55d1) on levels 7Fj of samarium ions were investigated. The broad photoluminescence band ...
  • Up-conversion luminescence in GaSe nanocrystals 
    SYRBU, N. N.; STAMOV, I. G.; DOROGAN, A. V.; ZALAMAI, V. V. (Elservier, 2021)
    Optical properties of GaSe crystals have been investigated at wide temperature range from 10 to 300 K by help of reflection, absorption, and wavelength modulated reflection, and transmission spectra. Received data were ...
  • The superposition of the lattice radiation and reflectivity spectra of tetragonal TeO/sub 2/ crystals 
    SYRBU, N. N.; RADAUTSAN, S. I.; CRETU, R. V.; MUSHINSKII, V. P.; CEBOTARI, V. Z. (IEEE, 1995)
    The superposition of infrared reflectivity spectra end lattice radiation of TeO/sub 2/ crystals have been investigated. Both radiation spectra at high temperatures and absorption spectra in the two-phonon range for ...
  • The superposition of one- and two-phonon absorption and radiation in TeO2 crystal 
    SYRBU, N. N.; CREŢU, R. V. (Elservier, 1996)
    Raman scattering and IR reflectivity for actual configuration have been investigated. The contours of reflectivity spectra rave been calculated. Phonon parameters have been determined. The temperature dependence of Raman ...
  • The Reflectivity Spectra of Zinc and Cadmium Diarsenides and Diphosphides 
    SOBOLEV, V. V.; SYRBU, N. N.; UGAI, Ya. A. (Elservier, 1969)
    The present note reports reflectivity spectra investigated on oriented cleaved crystals of tetragonal CdAb2, CdP2, and ZnP2 and monoclinic ZnAs2 and ZnP2 in energy range 0,8 to 12,5 eV at 300 at 77 0K.
  • The fundamental absorption edge of PbGa2S4 
    NEUMANN, H.; HÖRIG, W.; NOOKE, G.; SYRBU, N. N. (Elservier, 1988)
    Optical absorption spectra of PbGa2S4 are measured in the photon energy range from 2.0 to 3.2 eV and for temperatures between 32 and 300 K. PbGa2S4 is found to be an indirect-gap semiconductor with a gap energy of 2.84 eV ...
  • The effect of oxygen on optical absorption and emission of Pr:Ga–La–S glass 
    SEDDON, A. B.; FURNISS, D.; IOVU, M. S.; SHUTOV, S. D.; SYRBU, N. N.; ANDRIESH, A. M.; ADRIAENSSENS, G. J. (Elservier, 2003)
    The absorption and emission spectra of Ga–La–S–O glasses with fixed cation ratio Ga/La=0.7/0.3 and two oxygen contents 0.65 wt% and 2.95 wt% were studied for two Pr3+ doping levels of 0.1 and 1.0 wt%. Presence of oxygen ...
  • The Band Structure of TlGaSe2 Crystals 
    SYRBU, N. N.; ZALAMAI, V. V.; STAMOV, G.; NEMERENCO, L. N. (Open Science Publishers, 2015)
    Energies of electron transitions for the energy diapason 2 - 6 eV were identified from the analysis of reflection and wavelength modulated reflection spectra measured at temperature 30 K. Bands parameters were determined ...
  • 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 ...
  • Switching effects in Ag2S–Ag3AsS3 quantum dots 
    DEMIDENCO, I. V.; ZALAMAI, V. V.; STAMOV, I. G.; SYRBU, N. N. (Elservier, 2020)
    Photoluminescence and wavelength-modulated transmission spectra of Ag3AsS3 crystals were investigated at 10 K Ag3AsS3 structures with Ag2S layers were obtained by chemical and electrochemical methods. It was shown that ...
  • Spectroscopical Study of Amorphous AsSe : Sn Films 
    IOVU, M. S.; SYRBU, N. N.; SHUTOV, S. D.; VASILIEV, I. A.; REBEJA, S.; COLOMEICO, E.; POPESCU, M.; SAVA, F. (WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim, 1999)
    The effect of tin impurities on optical spectra of thermally deposited AsSe films doped with Sn (1 to 10 at\%) was studied in a wide energy interval from 0.8 to 6.2 eV by combination of reflection, absorption, photoresponse ...
  • Spectroscopical study of amorphous AsSe films containing tin impurity 
    IOVU, M. S.; POPESCU, M.; SYRBU, N. N.; SHUTOV, S. D.; VASILIEV, I. A.; REBEJA, S.; COLOMEICO, E. (IEEE, 1998)
    Optical absorption of thermally deposited AsSe films doped with Sn impurity (1 to 10 at.%) is studied in a wide energy interval from 0.8 to 6.2 eV by combination of reflection, absorption, photoresponse and photocapacitance ...
  • Влияние электрического поля барьера шоттки на оптические спектры дифосфида цинка 
    СТАМОВ, И. Г.; СЫРБУ, Я . Я.; ХАЧАТУРОВА, С. Б. (Ioffe Institute, 1984)
    Исследовано влияние электрического поля барьера Шоттки Au—ZnP2 на водородоподобные спектры отражения и поглощения в дифосфиде цинка. Установлено влияние поля на контур экситонных спектров отражения, а также на спектры ...
  • Resonance Raman scattering by excitonic polaritons in CuGaS2 
    SYRBU, N. N.; BLAZHE, M.; TIGINYANU, I. M.; TEZLEVAN, V. E. (Springer Nature Switzerland, 2002)
    Resonance Raman scattering by exciton polaritons in crystals of CuGaS2 under excitation with the 4880 and 4765 Å lines of an Ar+ laser at 9 K is studied. Lines of one-and two-phonon scattering of excitonic polaritons are ...
  • Resonance impurity radiation in CuGaS2 crystals 
    SYRBU, N. N.; NEMERENCO, L. L.; TEZLEVAN, V. E. (Elservier, 2007)
    In this work the reflectivity spectra of the CuGaS2 crystals have been investigated in the EIIc polarization and the absorption spectra were studied in the E⊥c polarization at the 10K. The parameters of the excitons and ...
  • Reflectivity spectra of the orthorhombic crystal Bi2S3 
    SOBOLEV, V. V.; SYRBU, N. N.; NIKITINA, V. K.; LOBANOVA, YU. K. (WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim, 1970)
    The present communications is devoted to the investigation of the electronic spectra of Bi2S3 single crystals in the range of 1 to 12,5 eV.

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