Zhipeng Yu, Xinyue Gao, Jing Yao, Haoran Li, Yuzhi Shi, Bo Li, Zhenwei Xie, Xiaocong Yuan, Puxiang Lai, Qinghua Song
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引用次数: 0
摘要
矢量元面全息技术允许对元面全息图像的振幅、相位和偏振分布进行独立控制,在光学显示、光学和量子通信领域发挥着至关重要的作用。然而,以往关于矢量元表面全息技术的研究通常局限于单自由度输入和单通道输出,因此显示出非常有限的调制能力。本研究提出了一种利用自旋轨道锁定涡旋光束实现多通道矢量元表面全息的新方法。在每个通道中,光学矢量场由一对总角动量(TAM)编码,这对总角动量具有两个正交自旋角动量(SAM),并与任意轨道角动量(OAM)独立锁定。该方法依赖于改进的格奇伯格-萨克斯顿算法,能够在单个相位轮廓中对各种 TAM 通道进行编码。因此,采用非交错方法的纯几何相位元面可用于支持这种多通道矢量全息技术,实现 SAM 和 OAM 的高选择性,并提供复杂光通道的精确路由和操纵。这项研究为全息领域带来了范式转变,为高密度光信息处理和未来光子设备设计提供了前景广阔的途径。
Vectorial metasurface holography, allowing for independent control over the amplitude, phase, and polarization distribution of holographic images enabled by metasurfaces, plays a crucial role in the realm of optical display, optical, and quantum communications. However, previous research on vectorial metasurface holography has typically been restricted to single degree of freedom input and single channel output, thereby demonstrating a very limited modulation capacity. This work presents a novel method to achieve multi-channel vectorial metasurface holography by harnessing spin-orbit-locking vortex beams. In each channel, the optical vectorial field is encoded with a pair of total angular momentums (TAMs) featuring two orthogonal spin angular momentums (SAMs) independently locked with arbitrary orbital angular momentums (OAMs). The methodology relies on a modified Gerchberg-Saxton algorithm, enabling the encoding of various TAM channels within a single phase profile. Consequently, a pure geometry-phase metasurface with a non-interleaved approach can be used to support such multi-channel vectorial holography, achieving high selectivity of both SAM and OAM, and offering precise routing and manipulation of complex light channels. The work presents a paradigm shift in the field of holography, offering promising avenues for high-density optical information processing and future photonic device design.
期刊介绍:
Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.