Demergis Vassili, Florin Ernst-Ludwig
The University of Texas at Austin, Department of Physics, Center for Nonlinear Dynamics, 1 University Station C1600, Austin, Texas 78712, USA.
Opt Express. 2011 Oct 10;19(21):20833-48. doi: 10.1364/OE.19.020833.
We introduce the Standing Wave Optical Line Trap (SWOLT) as a novel tool for precise optical manipulation and long-range transport of nano-scale objects at low laser power. We show that positioning and transport along the trap can be achieved by controlling the lateral component of the scattering force while the confinement of the particles by the gradient force remains unaffected. Multiple gold nanoparticles with a diameter of 100 nm were trapped at a power density 3 times smaller than previously reported while their transverse fluctuations remained sufficiently small (±36 nm) to maintain the order of the particles. The SWOLT opens new doors for sorting, mixing, and assembly of synthetic and biological nanoparticles.
我们介绍了驻波光阱（SWOLT），它是一种在低激光功率下对纳米级物体进行精确光学操纵和远程传输的新型工具。我们表明，通过控制散射力的横向分量，可以实现沿光阱的定位和传输，而梯度力对粒子的束缚不受影响。多个直径为100 nm的金纳米粒子被捕获，其功率密度比先前报道的小3倍，同时它们的横向波动保持足够小（±36 nm）以维持粒子的有序排列。驻波光阱为合成和生物纳米粒子的分选、混合和组装打开了新的大门。
