Bender Nicholas, Yılmaz Hasan, Bromberg Yaron, Cao Hui
Opt Express. 2019 Mar 4;27(5):6057-6067. doi: 10.1364/OE.27.006057.
Laser speckles have become a fundamental component of the modern optics-research toolbox. Not only are speckle patterns the basis of numerous imaging techniques, but also, they are employed to generate optical potentials for cold atoms and colloidal particles. The ability to manipulate a speckle pattern's spatial intensity correlations, particularly long-range (non-local) ones, is essential in numerous applications. A typical fully-developed speckle pattern, however, only possesses short-ranged (local) intensity correlations which are determined by the spatial field correlations. Here we experimentally demonstrate and theoretically develop a general method for creating fully-developed speckles with strong non-local intensity correlations. The functional form of the spatial intensity correlations can be arbitrarily tailored without altering the field correlations. Our approach provides a versatile and utilitarian framework for enhancing and controlling non-local correlations in speckle patterns.
激光散斑已成为现代光学研究工具箱的基本组成部分。散斑图案不仅是众多成像技术的基础，而且还被用于为冷原子和胶体粒子产生光学势。在众多应用中，操纵散斑图案的空间强度相关性，特别是长程（非局部）相关性的能力至关重要。然而，典型的完全发展的散斑图案仅具有由空间场相关性决定的短程（局部）强度相关性。在这里，我们通过实验证明并从理论上开发了一种创建具有强非局部强度相关性的完全发展散斑的通用方法。空间强度相关性的函数形式可以在不改变场相关性的情况下任意定制。我们的方法为增强和控制散斑图案中的非局部相关性提供了一个通用且实用的框架。
