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15 May 2012Subwavelength plasmonic kinks, solitons, and oscillons in arrays of nonlinear metallic nanoparticles
We consider spatial hysteresis and modulational instability in arrays of nonlinear metallic nanoparticles. We show
that such plasmonic systems are characterized by a bistable response, and they can support the propagation of
dissipative switching waves (or plasmonic kinks) connecting the states with different polarization. We demonstrate
that modulational instability, also inherent in our system, can lead to the formation of regular periodic
or quasi-periodic modulations of the polarization. We reveal that arrays of metallic nanoparticles can support
nonlinear localized modes of two different types - plasmon-solitons and plasmon-oscillons. They both possess
deeply subwavelength size. However, the profile of plasmon-solitons is stationary; whereas plasmon-oscillons has
the oscillating profile which can stand at rest or slowly drift along the chain.
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Roman E. Noskov, Pavel A. Belov, Yuri S. Kivshar, "Subwavelength plasmonic kinks, solitons, and oscillons in arrays of nonlinear metallic nanoparticles," Proc. SPIE 8434, Nonlinear Optics and Applications VI, 84340G (15 May 2012); https://doi.org/10.1117/12.921762