Vieira Tárcio A, Gesualdi Marcos R R, Zamboni-Rached Michel, Recami Erasmo
Opt Lett. 2015 Dec 15;40(24):5834-7. doi: 10.1364/OL.40.005834.
In recent times, we experimentally realized quite an efficient modeling of the shape of diffraction-resistant optical beams, thus generating for the first time the so-called frozen waves (FW), whose longitudinal intensity pattern can be arbitrarily chosen within a prefixed space interval of the propagation axis. In this Letter, we extend our theory of FWs, which led to beams endowed with a static envelope, through a dynamic modeling of the FWs whose shape is now allowed to evolve in time in a predetermined way. Further, we experimentally create such dynamic FWs (DFWs) in optics via a computational holographic technique and a spatial light modulator. Experimental results are presented here for two cases of DFWs, one of zeroth order and the other of higher order, the latter being the most interesting exhibiting a cylindrical surface of light whose geometry changes in space and time.
近年来，我们通过实验实现了对耐衍射光束形状的高效建模，从而首次产生了所谓的冻结波（FW），其纵向强度分布可在传播轴的预定空间间隔内任意选择。在本信函中，我们扩展了冻结波理论，该理论通过对形状现在允许以预定方式随时间演化的冻结波进行动态建模，从而产生具有静态包络的光束。此外，我们通过计算全息技术和空间光调制器在光学中实验性地创建了这种动态冻结波（DFW）。本文给出了两种动态冻结波的实验结果，一种是零阶的，另一种是高阶的，后者最为有趣，呈现出一个光圆柱面，其几何形状在空间和时间上都会发生变化。
