我們提出在二維簡單奈米電漿光學晶格中奈米小球的傳輸特性。其光學位勢是藉由非完全對焦的高斯光束照射在陣列的金屬圓柱來激發電漿共振。
這樣的光學位勢能提供奈米粒子在晶格中運輸有兩種原因，一種是因為近場的光學分力另一種則是因為光熱效應造成的熱對流運輸行為。而這熱對流運輸行為因雷射光對陣列的奈米電漿加熱導致有個非定域的溫度分布，並且也對此做了模擬。
為了瞭解奈米粒子傳輸的行為，我們觀察500nm小球在光子晶格內的傳輸行為；在光子晶格外則是觀察微米大小小球的傳輸行為，最後分析其軌跡並比較兩者軌跡和速度。實驗合併了因熱對流而能有效的長距離運輸和因近場產生能短距離運輸的電漿光學晶格。這實驗也開啟了我們新的研究方向，也對未來的研究有了很大幫助。

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.

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