Extended-area optically induced organization of microparticies on a surface -: art. no. 031106

被引:88
作者
Garcés-Chávez, V
Dholakia, K
Spalding, GC
机构
[1] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland
[2] Illinois Wesleyan Univ, Dept Phys, Bloomington, IL 61702 USA
基金
美国国家科学基金会; 英国工程与自然科学研究理事会;
关键词
D O I
10.1063/1.1843283
中图分类号
O59 [应用物理学];
学科分类号
摘要
To extend beyond the limited field of view associated with optical tweezers, we implement a new geometry for lensless optical trapping ("LOT"). A Ronchi ruling is imaged at a sample interface beyond the critical angle for total internal reflection imposing local structure upon the optical fields. Due to the resulting transverse optical gradients, more than one thousand microparticles spanning 1 mm(2) were organized into microchannels that are entirely optical in origin. A generalized approach is presented, allowing for either guiding or stable trapping, as a function of the relative intensity of the counterpropagating surface waves. (C) 2005 American Institute of Physics. [DOI: 10.1063/1.1843283]
引用
收藏
页码:1 / 3
页数:3
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