论文标题
具有光学结合的胶体链和驱动簇的形成
Formation of Colloidal Chains and Driven Clusters with Optical Binding
论文作者
论文摘要
我们研究光学结合力对波长大小的胶体颗粒的影响，可以在反传播束中移动。这项工作是由使用光学结合来指导大量胶体颗粒组装的概念的动机。先前的工作使用了少量的颗粒和/或1D或2D限制的几何形状。利用一种新型的实验方案，我们描述了20--100个颗粒在3维空间中自由移动的一般静态和动态自组织行为。我们观察到胶体将胶体的自组织与驱动粒子簇的形成以及驱动的粒子簇的形成。此外，我们表明这些光学结合系统的结构和行为可以使用结合光的颗粒和特性的折射率调整。特别是，我们表明驱动的行为源自$ n $ body的交互，这对未来在2个以上粒子的光学绑定簇上具有重要意义。
We study the effects of the optical binding force on wavelength sized colloidal particles free to move in a counter-propagating beam. This work is motivated by the concept of using optical binding to direct the assembly of large numbers of colloidal particles; previous work has used small numbers of particles and/or 1D or 2D restricted geometries. Utilizing a novel experimental scheme, we describe the general static and dynamic self-organization behaviors for 20--100 particles free to move in 3-dimensional space. We observe the self-organization of the colloids into large optically bound structures along with the formation of driven particle clusters. Furthermore we show that the structure and behavior of these optically bound systems can be tuned using the refractive index of the particles and properties of the binding light. In particular, we show that the driven behavior originates from $N$-body interactions, which has significant implications for future work on optically bound clusters of more than 2 particles.
