Abstract
Abstract We report the characterization of transport of nanosphere in two-dimensional simple square nanoscale plasmonic optical lattice.The optical potential is created by illumination an array of gold nanodisks with a loosely focused Gaussian beam to excite plasmonic resonance. Such optical potential confers both in lattice particle transport due to near field optical gradient force and photothermallly induced convection transport behavior.The convection transport results from a delocalized temperatue profile from photothermally heating of the nanoplasmonic array.Simulation of the convection is also given. In order to know the transport behavior,we observe 500nm sepheres in the lattice and using micron size of sepheres which are out of lattice.Then,we analyze the trajectory and calculate the velocity to compare the sepheres which are in lattice and the sepheres which are out of the lattice.This work opens up new avenues for combination both the thermally assisted long range transport and the short range near field trapping of plasmonic optical lattice.