项目名称: 动态全光控表面等离子体新型光镊基础研究
项目编号: No.11204141
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 物理学I
项目作者: 闵长俊
作者单位: 深圳大学
项目金额: 30万元
中文摘要: 针对目前光镊技术研究中存在的近场光镊倏逝场偏弱、金属颗粒难以捕获等问题,开展动态全光控表面等离子体(SP)新型光镊基础研究。利用SP增强光镊捕获力,降低对光源强度的要求,并通过矢量光束实现对SP光镊的全光、动态操控。研究内容包括:(1)研究SP与金属颗粒的耦合作用对电磁场增强和光镊捕获的影响,建立相关理论模型;(2)研究矢量光束的偏振等特性对SP场分布和光镊力的作用,建立全光、动态的操控方法;(3)研究颗粒特性和布朗运动对SP光镊操控效果的影响,发展对100纳米以内尺寸颗粒的捕获和操控技术;(4)开展SP光镊在表面拉曼信号增强、生物细胞病变诊断等方向的初步应用研究。本项目不仅对光镊技术本身的新发展具有重要价值,而且对表面拉曼信号探测、临床医学检测与诊断等应用领域具有重要意义。
中文关键词: 表面等离子体;光镊;矢量光束;;
英文摘要: In order to solve the problems in recent research on optical tweezers technology, such as weak evanescent field in near-filed optical tweezers and the difficulty in trapping metallic particles, we plan to do the basic research on dynamic all-optical controlled Surface Plasmon (SP) novel optical tweezers. The SP can be used to enhance the trapping force in optical tweezers and reduce the requirement for the light source intensity. We also use the vector beams to achieve all-optical and dynamic manipulation on SP optical tweezers. This project includes: (1) studying the interaction between SP and metallic particles, and its effect on electromagnetic filed enhancement and the trapping result, building corresponding theoretical model; (2) studying the effect of properties of vector beams such as polarization states on the distribution of SP filed and the force in optical tweezers, building all-optical and dynamic manipulation methods; (3) studying the effect of properties of particles and Brownian movement on the trapping in SP optical tweezers, developing trapping and manipulation technology for the particles smaller than 100 nanometers; (4) studying the applications of SP optical tweezers in Surface-Enhanced Raman Spectroscopy (SERS) and detection for normal cells and cancerous cells. The studies in this project h
英文关键词: Surface Plasmon;optical tweezers;vector beams;;