7 March 2016 Influence of nanorod absorption spectrum width on superluminality effect for laser pulse propagation
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Abstract
We investigate the influence of the finite absorption spectrum width on the soliton formation and superluminality phenomenon at a femtosecond pulse propagation in a medium with noble nanoparticles. These effects take place if a positive phase-amplitude grating is induced by laser radiation. We take into account the two-photon absorption (TPA) of laser radiation by nanorods, and time-dependent nanorod aspect ratio changing due to their melting or reshaping because of laser energy absorption, and the nanorod absorption spectrum width. On the basis of computer simulation we demonstrate these effects in a medium with positive phase-amplitude grating, induced by laser radiation, if a weak laser energy absorption takes place on the laser pulse dispersion length.
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Vyacheslav A. Trofimov, Vyacheslav A. Trofimov, Tatiana M. Lysak, Tatiana M. Lysak, "Influence of nanorod absorption spectrum width on superluminality effect for laser pulse propagation", Proc. SPIE 9763, Slow Light, Fast Light, and Opto-Atomic Precision Metrology IX, 97631Q (7 March 2016); doi: 10.1117/12.2214502; https://doi.org/10.1117/12.2214502
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