辐射流光阱
Optical Trapping by Radiometric Flow
摘要：
浸没在粘性流体中的微米大小的中性非电介质粒子可以被捕获在高斯光束的焦平面中。粒子可以从具有大的径向强度梯度的这种束吸收能量，导致相当大的温度梯度和辐射扭矩，该辐射扭矩使其围绕垂直于辐射能通量的轴快速旋转。粒子也被观察到围绕光轴的轨道。在这里，我们调查这个系统的基本物理，辐射粒子阱，并讨论其使用气体动力学理论的法律。
英文摘要：
Micron sized, neutral, non-dielectric particles immersed in a viscous fluid can be trapped in the focal plane of a Gaussian beam. A particle can absorb energy from such a beam with a large radial intensity gradient, resulting in substantial temperature gradients and a radiometric torque which causes it to spin rapidly about an axis perpendicular to the flux of radiant energy. The particles are also observed to orbit around the optical axis. Here we investigate the fundamental physics of this system, the Radiometric Particle Trap, and discuss its force laws using gas-kinetic theory.
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