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arXiv physics/0702045physics.optics
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立方体的光陷

Optical trapping of a cube

A. M. Branczyk, T. A. Nieminen, N. R. Heckenberg, H. Rubinsztein-Dunlop

摘要:

光学驱动的微机械的成功开发和优化将大大提高的能力,计算模型的光学力和扭矩施加到这样的设备。原则上,这可以通过计算这种器件的光散射特性来完成。然而,虽然快速方法存在的球体和轴对称粒子的散射计算,光学驱动的微机械几乎总是更复杂的几何形状。幸运的是,这种微机械通常具有高度对称性,通常是离散的旋转对称性。目前许多光学驱动微机械的设计也是关于平面镜像对称的。我们展示了如何使用这种对称性来减少数量级所需的计算时间。类似的改进也可以用于其他高度对称的物体,例如晶体。我们证明了这种方法的有效性,通过建模的光捕获的立方体,并表明,即使是简单的形状可以作为光学驱动的微机械。

英文摘要:

The successful development and optimisation of optically-driven micromachines will be greatly enhanced by the ability to computationally model the optical forces and torques applied to such devices. In principle, this can be done by calculating the light-scattering properties of such devices. However, while fast methods exist for scattering calculations for spheres and axisymmetric particles, optically-driven micromachines will almost always be more geometrically complex. Fortunately, such micromachines will typically possess a high degree of symmetry, typically discrete rotational symmetry. Many current designs for optically-driven micromachines are also mirror-symmetric about a plane. We show how such symmetries can be used to reduce the computational time required by orders of magnitude. Similar improvements are also possible for other highly-symmetric objects such as crystals. We demonstrate the efficacy of such methods by modelling the optical trapping of a cube, and show that even simple shapes can function as optically-driven micromachines.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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