Carruthers A E, Reid J P, Orr-Ewing A J
School of Chemistry, University of Bristol, Cantock's Close, Bristol, UK.
Opt Express. 2010 Jun 21;18(13):14238-44. doi: 10.1364/OE.18.014238.
We present evidence that aerosol droplets, approximately 1-2microm in diameter, can be optically bound over a 4mm distance within a volume formed by the overlap of the central cores and rings of two counterpropagating Bessel beams. The sizes of the individual polydisperse aerosol particles can be estimated from the angular variation of the elastic light scattering. Scattered light from the two orthogonally polarized trapping beams and from a Gaussian probe beam of different wavelength can be used to provide independent estimations of size. The coalescence of two droplets was observed and characterized.
我们提供的证据表明，直径约1-2微米的气溶胶液滴能够在由两个反向传播的贝塞尔光束的中心芯和环重叠形成的体积内，在4毫米的距离上实现光学束缚。可以根据弹性光散射的角度变化来估算单个多分散气溶胶颗粒的大小。来自两个正交偏振捕获光束以及不同波长的高斯探测光束的散射光可用于提供大小的独立估算。观察并表征了两个液滴的聚结过程。
