Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China.
Engineering Research Center of Optical Instrument and System, Ministry of Education, Shanghai Key Lab of Modern Optical System, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, China.
Nat Commun. 2018 Nov 28;9(1):5035. doi: 10.1038/s41467-018-07282-y.
A light beam propagating over an infinite anti-diffracting distance requires infinite power to preserve its shape. However, the fundamental barrier of finite power in free space has made the problem of diffraction insurmountable in recent decades. To overcome this limitation, we report an approach that employs the multiple energy oscillation mechanism, thereby permitting the creation of a light beam with an ultralong anti-diffracting distance in free space. A versatile optical pen is therefore developed to manipulate the number, amplitude, position and phase of energy oscillations for a focusing lens so that multiple energy oscillations can be realized. A light beam with a tunable number of energy oscillations is eventually generated in free space and propagates along a wavy trajectory. This work will enable the extension of non-diffractive light beams to an expanded realm and facilitate extensive developments in optics and other research fields, such as electronics and acoustics.
传播于无限反扩散距离的光束需要无限的能量来保持其形状。然而，自由空间中有限功率的基本障碍使得近几十年来的衍射问题无法克服。为了克服这一限制，我们报告了一种利用多能量振荡机制的方法，从而在自由空间中产生具有超长反扩散距离的光束。因此，开发了一种通用的光学笔来控制聚焦透镜的能量振荡的数量、幅度、位置和相位，从而实现多能量振荡。最终在自由空间中产生了具有可调谐能量振荡数量的光束，并沿着波浪形轨迹传播。这项工作将使无扩散光束的扩展领域得以扩展，并促进光学及其他研究领域（如电子学和声学）的广泛发展。
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