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Laser irradiation modulating the acoustic radiation force acting on a liquid ball in a plane progressive wave

机译：激光照射调制在平面渐进波中作用在液体球上的声学辐射力

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摘要

We present a theoretical study of the modulation using laser irradiation of an acoustic radiation force (ARF) acting on a liquid ball. The ARFs acting on a laser-irradiated oleic acid (OA) sphere were investigated using a mathematical model and were verified using the finite element method (FEM). It was found that, when the influence of the photoacoustic (PA) effect on the ARF is stronger than that from the acoustic scattering, a negative ARF can be realized. The ARF on a laser-irradiated OA sphere can be greatly modulated by the laser intensity and the phase difference between the plane acoustic wave and the laser beam. There is a region of the phase difference in which a negative ARF can be achieved by changing the laser intensity. In addition, we found that increasing the radius of the OA sphere enhanced the ARF and that a surrounding medium with a higher acoustic impedance enabled a larger negative ARF. Our results may be beneficial to the acoustic manipulation of liquid particles such as biological cells and protein drugs.
机译：我们介绍了使用作用在液球上的声辐射力（ARF）的激光照射的调制的理论研究。使用数学模型研究作用在激光辐射的油酸（OA）球体上的ARFS，并使用有限元方法（FEM）进行验证。发现，当光声（PA）对ARF对ARF的影响比从声学散射的影响力时，可以实现负ARF。激光照射OA球体上的ARF可以通过激光强度和平面声波和激光束之间的相位差大大调制。存在相位差的区域差，其中可以通过改变激光强度来实现负ARF。另外，我们发现，增加OA球的半径增强了ARF，并且具有较高声阻抗的周围介质使能更大的负ARF。我们的结果可能对液体颗粒如生物细胞和蛋白质药物的声学操纵有益。

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