基于倏逝场微小粒子驱动技术研究进展

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...

Research Progress of Micro-Particles Pushed by Evanescent Field

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 advantages 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 over 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 manipulation 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.