基于倏逝场微小粒子驱动技术研究进展  

Research Progress of Micro-Particles Pushed by Evanescent Field

作　　者：邓洪昌[1] 毕思思 赵浩宇[1] 苑立波[1] 

机构地区：[1]哈尔滨工程大学理学院,黑龙江哈尔滨150001

出　　处：《光学与光电技术》2011年第3期38-43,共6页Optics & Optoelectronic Technology

基　　金：国家自然科学基金仪器专项(60927008);国家自然科学基金(60877046;60807032)资助项目

摘　　要：处于倏逝场中的微小粒子会受到辐射压力的作用而朝着倏逝场的传播方向运动,基于此原理的微小粒子驱动技术可用于介质颗粒、胶体颗粒、生物细胞等微小粒子的捕获和驱动。由于倏逝场光学微操作系统不会受到物镜焦深和激光光斑尺寸的限制,因此它比自由空间系统的优越性更强,而波导形成的光学力可以应用于长距离驱动,其仅仅受限于系统的散射和吸收损耗。综述了基于倏逝场微小粒子驱动技术的最新进展,包括广域倏逝场微操纵、平面波导结构的倏逝场微操纵和光纤结构的倏逝场微操纵,并对其进行了比较,分析了它们的捕获能力、驱动效率、结构特点等问题,以及未来的发展趋势。Particles such as dielectric particles, colloidal particles and cells can be trapped and pushed by the action of optical forces in evanescent field. Evanescent field based optical transport and trapping using photonic structures has several advan tages over free-space systems. It is not limited by the focal depth of the objective lens and the spot size of the laser. With waveguides the optical forces can be applied ove：＂ long distances, limited only by the scattering and absorption losses in the system. The manipulation of particles in evanescent field has attracted a great interest of researchers. New advances of ma- nipulation of particles in evanescent field by prism, plannar waveguide and fiber are introduced in this paper. The capability of trapping, efficiency of driving and prospect for further inverstigation are discussed as well.

关 键 词：光捕获 光操纵 光驱动 倏逝场 辐射力 

分 类 号：O439[机械工程—光学工程]