Optical and vibrational properties of new "Nano-Designed" materials produced by pulsed laser deposition

Abstract : We have developed new concepts for the fabrication of thin layer of nanostructured materials based on the deposit by alternate laser ablation of metal (Ag) and dielectric (Al2O3). This technique allows us to reach an optimal control on the morphological parameters of the nanostructures, which determine the optical response of the thin layers. We produced nanospheres, nanolentils and nanocolumns, self-organized and oriented, embedded in an amorphous alumina matrix. Their optical response was studied according to their morphology and was compared with theoretical simulations. Simultaneously, the vibrational answer of nanostructures was analyzed using low frequency Raman spectrometry. Finally, nanostructures containing alternate layers of Co and Ag nanoparticles, respectively, and separated by few nanometers have also been produced. We have shown that the interaction between the surface plasmon and the spheroidal acoustic vibration modes of the nanoparticles, activates the Raman signal.
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Submitted on : Monday, June 16, 2008 - 2:53:58 PM
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  • HAL Id : tel-00288338, version 1

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Jeremie Margueritat. Optical and vibrational properties of new "Nano-Designed" materials produced by pulsed laser deposition. Physics [physics]. Université Paul Sabatier - Toulouse III, 2008. English. ⟨tel-00288338⟩

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