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Proceedings Paper

Optical phonons and electron-phonon coupling in CdSxSe1-x quantum dots
Author(s): Vincenzo Spagnolo; Gaetano Scamarcio; G. Ventruti; M. Lugara; Michele Ferrara; Ida Marie Catalano; Giancarlo C. Righini
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Paper Abstract

Absorption, photoluminescence, and Raman scattering studies of CdSxSe1-x nanocrystals, as a function of the crystallite mean radius, are reported. By properly considering the competing effects of spatial localization and strain, the chemical composition and the lattice contraction are assessed. Two different techniques have been used to analyze the electron-phonon coupling. Photoluminescence and absorption studies allow us to measure the Huang-Rhys parameter. The size dependence of the Frohlich electron-LO phonon interaction has been extracted, for the first time, from the polarization analysis of the Raman scattering. Our results unambiguously show that, in the investigated nanocrystal size range, the electron-phonon coupling monotonically increases at decreasing the nanocrystal radius. The observed behavior is in agreement with the latest calculations.

Paper Details

Date Published: 3 November 1995
PDF: 10 pages
Proc. SPIE 2648, International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics, (3 November 1995); doi: 10.1117/12.226211
Show Author Affiliations
Vincenzo Spagnolo, Univ. di Bari (Italy)
Gaetano Scamarcio, Univ. di Bari (Italy)
G. Ventruti, Univ. di Bari (Italy)
M. Lugara, Univ. di Bari (Italy)
Michele Ferrara, Univ. di Bari (Italy)
Ida Marie Catalano, Univ. di Bari (Italy)
Giancarlo C. Righini, IROE-CNR (Italy)


Published in SPIE Proceedings Vol. 2648:
International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics

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