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arXiv 2412.03367physics.optics
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通过非线性总角动量叠加实现光结构化

Light structuring via nonlinear total angular momentum addition with flat optics

University of Brescia(布雷西亚大学);National Institute of Optics-National Research Council(国家光学研究所-国家研究委员会);Karlsruhe Institute of Technology(卡尔斯鲁厄理工学院);University of Palermo(巴勒莫大学);Harbin Engineering University(哈尔滨工程大学)
Evgenii Menshikov, Paolo Franceschini, Kristina Frizyuk, Ivan Fernandez-Corbaton, Andrea Tognazzi, Alfonso Carmelo Cino, Denis Garoli, Mihail Petrov, Domenico d… 展开作者

Evgenii Menshikov, Paolo Franceschini, Kristina Frizyuk, Ivan Fernandez-Corbaton, Andrea Tognazzi, Alfonso Carmelo Cino, Denis Garoli, Mihail Petrov, Domenico de Ceglia, Costantino De Angelis

AI总结:

本研究通过非线性总角动量叠加,实现三阶谐波光的结构化,揭示其对泵浦偏振态的高度敏感性,为精确控制结构光提供了新方法。

摘要:

利用平板光学器件对光的结构进行塑造,推动了我们对光和光-物质相互作用的基本理解,并在图像处理、显微镜、光学通信、量子信息处理以及微粒操控等领域实现了广泛应用。然而,突破线性光学极限,进一步拓展结构光的边界仍是一个开放性挑战。非线性光学相互作用,如非线性平板光学中的波混频,提供了一个强大的平台,用于解锁生成和检测结构光的新自由度和功能。在本研究中,我们实验性地展示了通过非线性、各向同性平板光学元件(单层非晶硅薄膜)中总角动量投影的叠加,实现了三阶谐波光的非平凡结构化。我们识别出总角动量投影和手性是分析实验结果最关键的性质。我们提出的理论模型,通过数值模拟支持,提供了在不同泵浦条件下通过非线性波混频实现光结构化的定量预测,包括矢量化和非近轴泵浦光。值得注意的是,我们揭示三阶谐波光的形状对泵浦的偏振态高度敏感。我们的发现表明,利用非线性波混频中总角动量投影的叠加,可以成为生成和检测精确控制的结构光的强大策略。

英文摘要:

Shaping the structure of light with flat optical devices has driven significant advancements in our fundamental understanding of light and light-matter interactions, and enabled a broad range of applications, from image processing and microscopy to optical communication, quantum information processing, and the manipulation of microparticles. Yet, pushing the boundaries of structured light beyond the linear optical regime remains an open challenge. Nonlinear optical interactions, such as wave mixing in nonlinear flat optics, offer a powerful platform to unlock new degrees of freedom and functionalities for generating and detecting structured light. In this study, we experimentally demonstrate the non-trivial structuring of third-harmonic light enabled by the addition of total angular momentum projection in a nonlinear, isotropic flat optics element -- a single thin film of amorphous silicon. We identify the total angular momentum projection and helicity as the most critical properties for analyzing the experimental results. The theoretical model we propose, supported by numerical simulations, offers quantitative predictions for light structuring through nonlinear wave mixing under various pumping conditions, including vectorial and non-paraxial pump light. Notably, we reveal that the shape of third-harmonic light is highly sensitive to the polarization state of the pump. Our findings demonstrate that harnessing the addition of total angular momentum projection in nonlinear wave mixing can be a powerful strategy for generating and detecting precisely controlled structured light.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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