New technique for single-beam gradient-force optical trapping in air
New technique for single-beam gradient-force optical trapping in air
复制标题
空气中单光束梯度力光捕获新技术
DOI：
10.1080/15599612.2012.760122
复制
发表时间：
2013
影响因子：
5.5
通讯作者：
Y.Takaya
中科院分区：
文献类型：
--
作者：
M.Michihata;T.Yoshikane;T.Hayashi;Y.Takaya
激光俘获技术正成为微系统技术中的一项重要技术。为了将其应用于工业用途，应开发其在空气中发挥作用。然而，关于激光在空气中的捕获的研究并不多。原因之一是捕获微物体的困难。因此，我们提出了一种新的技术来捕获空气中的微小物体。特别地，我们将注意力集中在设置微物体的基板上。通过应用纹理化表面和采用碳化钨作为基底材料，捕获概率显著提高。虽然有了一定程度的提升，但这套困法还不够完美。为了确定作用在微物体上的力，实现了粘附力的解析计算和光学力的电磁仿真。在此基础上，讨论了激光在空气中成功俘获的最重要因素。
Laser trapping is becoming an important technique for microsystem technologies. To apply it to industrial uses, it should be developed to function in air. However, there is not much research about laser trapping in air. One of the reasons is the difficulty of trapping micro-objects. Therefore, we have proposed a new technique to trap micro-objects in air. In particular, we focused our attention on the substrate where the micro-object is set. By applying a textured surface and employing tungsten carbide as the substrate material, the trapping probability was improved by a remarkable amount. Although a certain degree of improvement was attained, the trapping was still not perfect. To ascertain the forces working on the micro-object, an analytical calculation of the adhesion forces and an electromagnetic simulation of the optical forces were implemented. Based on these calculations, we discuss what the most important factor is for successful laser trapping in air.