Anomalously low Rayleigh scattering by CdS/CdSe doped glasses

M. Shepilov (1) , A Anan'Ev (1) , L. Maksimov (1) , A. Onushchenko (2) , J. Margueritat (3)

1 S.I. Vavilov State Optical Institute
2 ITMO University [Russia]
3 iLM - LUMINESCENCE - iLM - Luminescence

Light scattering (Raman, Rayleigh and Mandelshtam-Brillouin) and absorption of commercial color glasses (cut-off optical filters containing nanocrystals of ternary compounds CdS_xSe_1-x) were studied. It was found for the first time that the contribution of nanocrystals to the Rayleigh scattering is unprecedentedly low for some of these glasses. This conclusion is confirmed by estimation of nanocrystal size and volume fraction from low-frequency Raman scattering and absorbance spectroscopy for a chosen set of samples. Anomalously low Rayleigh scattering of nanocrystals is explained in terms of interference of light scattered by different nanocrystals (in-terparticle interference). The possibility of interparticle interference effects in the case of small volume fraction of nanocrystals is illustrated by computer simulation using the model of diffusion-limited phase transformation proposed earlier.

Mots clés: Computer simulation; Interference effects; Light scattering; Landau-Placzek ratio; CdS/CdSe nanocrystals; Glass

Domaines: Optique [physics.optics]; Science des matériaux [cond-mat.mtrl-sci]

M. Shepilov, A Anan'Ev, L. Maksimov, A. Onushchenko, J. Margueritat. Anomalously low Rayleigh scattering by CdS/CdSe doped glasses. Journal of Non-Crystalline Solids, 2020, 544, pp.120234. ⟨10.1016/j.jnoncrysol.2020.120234⟩. ⟨hal-02871349⟩