Relative magnitude of dipolar and quadrupolar contriubutions to the second harmonic generation from small gold metallic nanoparticles | (2006) | Nappa |
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Proceedings Paper
Author(s): Jér?me
N Guillaume
R Isabelle
Russier-A Christian
J Emmanuel
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Paper Abstract
The optical second harmonic response from small gold metallic particles with a diameter ranging between 20 and 100 nm is investigated with the technique of Hyper Rayleigh Scattering. The analysis is performed as a function of the polarization state of the incoming fundamental beam. For the particles with the smallest diameters, the nonlinear optical response is purely dipolar, arising from the surface of the particles owing to the breaking of the centrosymmetry of the particles. For larger diameter particles, the retardation effects cannot be neglected anymore, the response exhibiting a clear quadrupolar pattern. A general framework is proposed to discuss the experimental data, based on a a weighing parameter allowing the quanitfication of the relative magnitude of the dipolar and quadrupoloar contributions.
Paper Details
Date Published: 9 June 2006PDF: 8 pagesProc. SPIE 6258, ICONO 2005: Novel Photonics Materials: Physics and Optical Diagnostics of Nanostructures, 62580O (9 June 2006); doi: Show Author AffiliationsJér?me
Nappa, Lab. de Spectrométrie Ionique et Moléculaire, CNRS, Univ. Claude Bernard Lyon 1 (France)Guillaume
Revillod, Lab. de Spectrométrie Ionique et Moléculaire, CNRS, Univ. Claude Bernard Lyon 1 (France)Isabelle
Russier-Antoine, Lab. de Spectrométrie Ionique et Moléculaire, CNRS, Univ. Claude Bernard Lyon 1 (France)Christian
Jonin, Lab. de Spectrométrie Ionique et Moléculaire, CNRS, Univ. Claude Bernard Lyon 1 (France)Emmanuel
Benichou, Lab. de Spectrométrie Ionique et Moléculaire, CNRS, Univ. Claude Bernard Lyon 1 (France), Lab. de Spectrométrie Ionique et Moléculaire, CNRS, Univ. Claude Bernard Lyon 1 (France)Published in SPIE Proceedings Vol. 6258:An Imperial Study on the Efficiency of Chinese Telecommunication Firms--《Money China》2012年08期
An Imperial Study on the Efficiency of Chinese Telecommunication Firms
This article first measures HHI in China's telecommunications market,which indicates the market a highly-concentrated one.Then DEA approach is introduced to analyze the efficiency of telecommunications sectors in China.The relationship between ROA and efficiency has also been taken into consideration.Furthermore,a lateral comparison with some foreign telecommunication firms is made to get a full picture of efficiency of telecommunication industry.By global comparison,a conclusion is reached that China Mobile is full efficient,while China Telecom and China Unicom should expand their scale and improve their technical efficiency.
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