IRTUM – Institutional Repository of the Technical University of Moldova

Browsing Colecția instituțională by Subject "wavelength"

Browsing Colecția instituțională by Subject "wavelength"

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  • Birefringence of Cu2ZnSiSe4 single crystals 
    SYRBU, N. N.; ZALAMAI, V.; GUC, M.; LEVCENKO, S.; DOROGAN, A.; ARUSHANOV, E. (Elservier, 2015)
    In Cu2ZnSiSe4 single crystals an interference spectra of the Fabry–Perot type due to observed birefringence were studied and spectral dependence of the refractive index n|| (E||c) and n⊥ (E⊥c), which intersect at isotropic ...
  • Birefringence of CuGaxAl1-xSe2 crystals 
    SYRBU, N. N.; DOROGAN, A. V.; MASNIK, A.; URSAKI, V. V. (IOP Publishing, 2011)
    Excitonic reflection spectra of CuAlSe2 crystals were studied at 10 K. The spectral dependences of refractive indices no and ne were calculated. The isotropic wavelength (the point of intersection of no and ne) in the ...
  • 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 ...
  • Effects of temperature on optical properties of ZnO networks 
    NAGPAL, Rajat; LUPAN, Cristian (Universitatea Tehnică a Moldovei, 2024)
    ZnO tetrapodal (t-ZnO) based photodetector has been fabricated for UV applications like wearable sensors, optical communications, pollution monitoring, etc. In this study, influence of operating temperature has been evaluated ...
  • Electronic and optical properties of HgIn2S4 thiospinels 
    SYRBU, N. N.; TIRON, A.; ZALAMAI, V. V. (IOP Publishing, 2019)
    Photoluminescence (PL), transmission (T), reflection (R), wavelength modulated transmission (ΔT/Δλ) and reflection (ΔR/Δλ) spectra of thiospinel HgIn2S4 crystals were investigated in temperature interval form 10 to 300 K. ...
  • Exciton - phonon spectra and energy band structure of crystals 
    SYRBU, N. N.; BOGDANASH, M.; TEZLEVAN, V. E.; STAMOV, I. G. (IOP Publishing, 1997)
    The excitonic reflectivity spectra and the wavelength derivative reflection spectra have been investigated. The n = 1, n = 2 and n = 3 states of the A, B and C exciton series are determined. The exciton binding energies ...
  • Exciton spectra and energy band structure of CuGaSe2 single crystals 
    LEVCHENKO, S.; SYRBU, N. N.; TEZLEVAN, V. E.; ARUSHANOV, E.; MERINO, J. M.; LEÓN, M. (IOP Publishing, 2008)
    Photoreflectivity, wavelength modulation spectroscopy and photoluminescence measurements of CuGaSe2 are used to determine the exciton and band parameters as well as the energy band structure of CuGaSe2 at photon energies ...
  • Exciton-phonon spectra in CuIn/sub 1-x/Ga/sub x/S/sub 2/ crystals 
    SYRBU, N. N.; NYARI, T.; BOGDANASH, M.; TEZLEVAN, V. E. (IEEE, 1999)
    In the present paper the excitonic reflectivity and the wavelength derivative reflection (WDR) study of CuGa/sub x/In/sub x-1/Se/sub 2/ solid solutions are presented. The states n=1, n=2 and n=3 of A, B, C exciton series ...
  • Exciton-phonon spectra in CuIn/sub 1-x/Ga/sub x/S/sub 2/ crystals 
    RADAUTSAN, S. I.; SYRBU, N. N.; CRETU, R. V.; TEZLEVAN, V. E. (IEEE, 1997)
    In this work, the wavelength derivative reflection (WDR) spectra of CuIn/sub 1-x/Ga/sub x/S/sub 2/ crystals have been investigated in the region of A, B and C series. The n=1, n=2 and n=3 states are determined and contours ...
  • Impact of light quantum in Rapid Photothermal Diffusion of Zn IN GaAs 
    SHISHIYANU, S. T.; SHISHIYANU, T. S. (IEEE, 2010)
    The experimental results of the Rapid Photothermal Diffusion (RPD) of Zn in GaAs and p-n junction formation, model and role of quantum factor in this process are presented in this paper. The p-n junctions with depth of ...
  • Improving the stability of distributed-feedback tapered master-oscillator power-amplifiers 
    TRONCIU, V. Z.; LICHTNER, M.; RADZIUNAS, M.; BANDELOW, U.; WENZEL, H. (Springer Nature Switzerland, 2009)
    We report theoretical results on the wavelength stabilization in distributed-feedback master-oscillator power-amplifiers which are compact semiconductor laser devices capable of emitting a high brilliance beam at an optical ...
  • 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 ...
  • Luminescence properties of a ZnO–In2O3 composite 
    URSAKI, V. V.; TIGINYANU, I. M.; BURLACU, A.; ZALAMAI, V.; JITARI, V. F. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2006)
    ZnO–In2O3 composite was prepared by thermal annealing of ZnIn2S4 crystals. Energy dispersive X-ray analysis demonstrated that annealing results in the formation of a composite consisting of ZnO and In2O3 phases with the ...
  • Optical spectra of TlGaS2 crystals 
    NEMERENCO, L.; SYRBU, N. N.; DOROGAN, V.; BEJAN, N. P.; ZALAMAI, V. V. (Elservier, 2016)
    Wavelength modulated reflection spectra measured at temperatures 14K and 300K in E||a and E||b polarizations for TlGaS2 crystals were investigated. The ground and excited states of excitons B2u in E||a polarization and B3u ...
  • Photoinduced effects and light emission in Ga-La-S:Pr/sup 3+/ glass 
    SEDDON, A .B.; FURNISS, D.; JOVU, M. S.; SHUTOV, S. D.; SYRBU, N. N.; ANDRIESH, A. M.; HERTOGEN, P.; ADRIAENSSENS, G. J. (IEEE, 2003)
    The absorption and radiation spectra of Ga-La-S-O glasses with fixed cation ratio Ga/La=0.7/0.3 and two oxygen content 0.65 Wt % and 2.95 Wt % were studied for two Pr/sup 3+/ doping levels of 0.1 and 1.0 Wt %. Presence of ...
  • Retroreflection of light from nanoporous InP: correlation with high absorption 
    PRISLOPSKI, S. Ya.; TIGINYANU, I. M.; GHIMPU, L.; MONAICO, E.; SIRBU, L.; GAPONENKO, S. V. (Springer Nature Switzerland, 2014)
    Pronounced retroreflection behavior is reported for a fishnet nanoporous strongly absorbing semiconductor material. Retroreflection appears along with diffusive specular reflection for all angles of incidence for light ...
  • Study of wavelength switching time in tunable semiconductor micro-ring lasers: experiment and travelling wave description 
    KHODER, Mulham; RADZIUNAS, Mindaugas; TRONCIU, Vasile; VERSCHAFFELT, Guy (Optical Society of America, 2018)
    We report in this paper the wavelength switching features of semiconductor ring lasers that are wavelength tunable based on filtered optical feedback. The filtered feedback provides a wavelength dependent loss mechanism ...
  • 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 ...
  • 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 ...
  • 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 ...

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