Optical properties of the ZnSe nanocrystals embedded in PMMA matrix

TitreOptical properties of the ZnSe nanocrystals embedded in PMMA matrix
Type de publicationCommunication
TypeCommunication avec actes dans un congrès
Date du colloque2008
Titre du colloque2nd ICTON Mediterranean Winter, ICTON-MW 2008
Titre des actes ou de la revueICTON-MW 2008
Pagination1 - 4
AuteurChaieb, A., Halimi, O., Bensouici, A., Boudine, B., Sebais, M., Sahraoui, Bouchta
EditeurIEEE Computer Society
ISBN978-1-4244-3484-8 / 978-1-4244-3485-5
Mots-clésAbsorption, absorption spectroscopy, band gap, band gap energy, blue shift, centrosymmetric matrix PMMA, Coatings, effective mass approximation, EMA model, emission spectroscopy, energy gap, exciton, exciton Bohr radius, excitons, filled polymers, II-VI semiconductors, linear optical properties, nanocrystals, nanocrystals (NCs), nanoparticles, Nd:YAG laser, nonlinear optical properties, Nonlinear optics, optical films, optical harmonic generation, Optical materials, Optical properties, Particle Size, PMMA, PMMA matrix, quantum confinement, quantum confinement state, quantum size effects, second order susceptibility, spectral line shift, spin coating, Sputtering, Stimulated emission, Thin films, wavelength 1064 nm, wide band gap semiconductors, zinc compounds, zinc selenide, ZnSe
Résumé en anglais

In this paper we report linear and nonlinear optical properties of the thin films based on nanocrystals ZnSe embedded in centrosymmetric matrix PMMA, deposited by spin coating technique. Absorption and emission spectroscopy are shown respectively a blue shift and a strong band emission near the band gap of bulk material ZnSe, which is tunable with particles size. Blue shift of the absorption edge used to evaluate the average size of nanoparticles by using the E.M.A model. The size of NCs of ZnSe was estimated to 1.98 nm, compared to the exciton Bohr radius of bulk material. We established a strong quantum confinement state for the NCS ZnSe. Using Nd:YAG laser at 1064 nm in picoseconds regime, Second order susceptibilities were measured by SHG technique. The obtained value was four order of magnitude larger compared with the bulk (ZnSe) value.


Date du colloque : 12/2008

URL de la noticehttp://okina.univ-angers.fr/publications/ua2132
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