Measurement of the restoring forces acting on two optically bound particles from normal mode correlations
Measurement of the restoring forces acting on two optically bound particles from normal mode correlations
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DOI：
10.1103/physrevlett.98.068102
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发表时间：
2007-02-09
影响因子：
8.6
通讯作者：
Wright, E. M.
中科院分区：
文献类型：
--
作者：
Metzger, N. K.;Marchington, R. F.;Wright, E. M.
沿两个反向传播的激光场的轴线的光学绑定可用于将微粒组织成纵向的、空间分离的阵列。在这里，我们研究了两个光学束缚的微粒子由于噪声而从它们的平衡位置位移之间的关联。通过测量质心和相对简正模的关联函数的衰减时间，提供了一种原位确定作用在束缚粒子上的光学恢复力的方法，从而检验了我们对纵向光学束缚的物理理解。
Optical binding along the axis of two counterpropagating laser fields may be used to organize microparticles into longitudinal, spatially separated, arrays. Here we investigate correlations between the displacements of two optically bound microparticles from their equilibrium positions due to noise. Measurement of the decay time of the correlation functions of the center of mass and relative normal modes is shown to provide an in situ method to determine the optical restoring forces acting on the bound particles, thereby providing a test of our physical understanding of longitudinal optical binding.