Spectral and temporal characteristics of metallic nanoparticles produced by femtosecond laser pulses |
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Authors: | D Scuderi O Albert J Etchepare |
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Institution: | a LOA, ENSTA, CNRS, Ecole Polytechnique, 91761 Palaiseau, France b GREMI, CNRS Université d’Orléans, 45067 Orléans, France c UME, ENSTA, 91761 Palaiseau, France |
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Abstract: | We study the time of flight optical emission from titanium and tungsten nanosized particles, generated through femtosecond laser-matter interaction in vacuum, in the wavelength spectral range from 300 to 900 nm. Typical spectra consist of broadband structureless signals similar to black body emission from a macroscopic object. Nanoparticles temperature, deduced from their emission spectra, decreases drastically as a function of their time of arrival at a given distance from the target. This behaviour is seen to be independent of individual particle velocities. |
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Keywords: | Metallic nanoparticles Femtosecond laser pulses Optical emission |
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