Optothermal pulling, trapping, and assembly of colloids using nanowire plasmons
Vandana Sharma,
Sunny Tiwari,
Diptabrata Paul
et al.
Abstract:Optical excitation of colloids can be harnessed to realize soft matter systems that are out of equilibrium. In this paper, we present our experimental studies on the dynamics of silica colloids in the vicinity of a silver nanowire propagating surface plasmon polaritons (SPPs). Due to the optothermal interaction, the colloids make a transition from a diffusive to superdiffusive behaviour, and are directionally pulled towards the excitation point of the nanowire. Having reached this point, they are spatio-tempor… Show more
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