We investigate splitting and self-trapping of the femtosecond pulse by nanorods reshaping front at optical radiation propagation in a medium containing gold nanorods. We take into account multi-photon absorption of laser radiation by nanorods, and time-dependent nanorod aspect ratio changing due to their reshaping. On the basis of computer simulation we demonstrate appearance of slowing down soliton and superluminality effect simultaneously for various sub-pulses which form from incident Gaussian un-chirped pulse. These sub-pulses possess chirp and soliton shape which differs from a classical soliton of Schrödinger equation with cubic nonlinearity.
Vyacheslav A. Trofimov and Tatiana M. Lysak, "Moving chirped soliton under laser pulse interaction with gold nanorods," Proc. SPIE 10232, Micro-structured and Specialty Optical Fibres V, 102320G (Presented at SPIE Optics + Optoelectronics: April 27, 2017; Published: 16 May 2017); https://doi.org/10.1117/12.2267497.
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