Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132, USA.
Opt Lett. 2011 Aug 1;36(15):2883-5. doi: 10.1364/OL.36.002883.
We observe optical trapping and manipulation of dielectric microparticles using autofocusing radially symmetric Airy beams. This is accomplished by exploiting either the inward or outward transverse acceleration associated with their chirped wavefronts. We experimentally demonstrate, for the first time to our knowledge, that such Airy beams morph into nondiffracting Bessel beams in their far-field. Furthermore, the ability of guiding and transporting microparticles along the primary rings of this class of beams is explored.
我们观察到使用自聚焦的径向对称艾里光束对介电微粒子的光捕获和操纵。这是通过利用与其啁啾波前相关的向内或向外的横向加速度来实现的。我们首次在实验中证明，这种艾里光束在远场中会变成无衍射的贝塞尔光束。此外，还探索了引导和沿这类光束的主环运输微粒子的能力。
