光阱力的构成 介质小球在光镊中主要受到两种力:梯度力 (Gradient Force) 和散射力(Scattering Force): 梯度力 梯度力来自介质小球中的电偶极矩在不均匀电磁场中受到的力。它正比与光强的梯度,指向光场强度的最大处 。
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force scattering 向前散射
Results validated that larger size and larger refractive index of particles resulted in larger gradient and scattering force.
结果表明光学散射力和梯度力随着小球半径和折射率的增大而增大。
A photon carries a momentum of, so one may anticipate light to "push" on any object standing in its path via the scattering force.
研究人员称,光子带有动量,因此可通过散射力推动物体在路径上前进。
Here, we show that it is possible to realize a backward scattering force which pulls a particle all the way towards the source without an equilibrium point.
但他们发现利用向后的散射力牵引粒子向后运动在理论上是可行的。
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