Transport and trapping in two-dimensional nanoscale plasmonic optical lattice

• Main Authors: Chen, Kuan-Yu, 陳冠宇
• Other Authors: Yang, Ya-Tang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/35809634060977170738

碩士 === 國立清華大學 === 電子工程研究所 === 101 === Recently, optical tweezers has been created various dimensions of periodic potential lattice for affecting the behavior of particles. According to the limitation of diffraction limit, it is difficult to shrink the experiment into nanoscale. In recent, plasmanic enhanced optical trapping can overcome the limitation of traditional optical tweezers because the surface plasmon concentrate light far below the diffraction limits and enhance optical intensity by resonance. In this thesis, we research the transport and trapping behavior of nanospheres of diameter 500 nm and 100 nm in two-dimensional nanoscale plasmanic optical lattice. Optical potential of the lattice is created by a two-dimensional of gold nanostructure array, and the plasmon resonance is illuminated by Gaussian beam. We observe the transport and trapping behavior of nanospheres in this optical potential. The stacking of diameter 500 nm spheres into hexagonal closed pack crystalline in this potential is also observed clearly. In this thesis, we introduce the setup of optical system clearly and make an explanation about the calculation and fabrication process of plasmonic structures.