Author Affiliations
Abstract
1 University of Freiburg, Department of Microsystems Engineering, Laboratory for Micro-Optics, Freiburg, Germany
2 GRINTECH GmbH, Jena, Germany
3 University of Freiburg, Department of Microsystems Engineering, Microsystems for Biomedical Imaging Laboratory, Freiburg, Germany
One-dimensional Airy beams allow the generation of thin light-sheets without scanning, simplifying the complex optical arrangements of light-sheet microscopes (LSMs) with an extended field of view (FOV). However, their uniaxial acceleration limits the maximum numerical aperture of the detection objective in order to keep both the active and inactive axes within the depth of field. This problem is particularly pronounced in miniaturized LSM implementations, such as those for endomicroscopy or multi-photon neural imaging in freely moving animals using head-mounted miniscopes. We propose a new method to generate a static Airy light-sheet with biaxial acceleration, based on a novel phase profile. This light-sheet has the geometry of a spherical shell whose radius of curvature can be designed to match the field curvature of the micro-objective. We present an analytical model for the analysis of the light-sheet parameters and verify it by numerical simulations in the paraxial regime. We also discuss a micro-optical experimental implementation combining gradient-index optics with a 3D-nanoprinted, fully refractive phase plate. The results confirm that we are able to match detection curvatures with radii in the range of 1.5 to 2 mm.
light-sheet microscopy Airy beam accelerating beams field curvature two-photon polymerization Advanced Photonics Nexus
2023, 2(5): 056005
空军工程大学信息与导航学院通信系统教研室，陕西 西安 710077
提出了一种可调谐非傍轴自加速光束产生方法，该方法可以使光束在不需要傍轴近似的情况下沿任意凸轨迹传播。利用维格纳函数和焦散线原理，导出了傅里叶空间振幅相位和自加速传播轨迹之间的显式表达式。通过设计傅里叶空间的初始角谱产生了具有自聚焦特性的非傍轴自加速阵列光束，分析了光束数量、阵列半径和光束参数大小等对焦点位置和自聚焦性能的影响。结果表明，该方法产生的自聚焦光束突破了傍轴近似限制，且光束轨迹和调控方式更加灵活高效。
物理光学 自加速光束 阵列光束 维格纳函数 光学焦散线 光学学报
2022, 42(20): 2026003
Author Affiliations
Abstract
1 Wuhan National Laboratory for Optoelectronics, and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
2 School of Information Engineering, Guangdong University of Technology, and Guangdong Provincial Key Laboratory of Photonics Information Technology, Guangzhou 510006, China.
Self-accelerating beams have the unusual ability to remain diffraction-free while undergo the transverse shift during the free-space propagation. We theoretically identify that the transverse optical field distribution of 2D self-accelerating beam is determined by the selection of the transverse Cartesian coordinates, when the caustic method is utilized for its trajectory design. Based on the coordinate-rotation method, we experimentally demonstrate a scheme to flexibly manipulate the rotation of transverse optical field for 2D self-accelerating beams under the condition of a designated trajectory. With this scheme, the transverse optical field can be rotated within a range of 90 degrees, especially when the trajectory of 2D self-accelerating beams needs to be maintained for free-space photonic interconnection.
self-accelerating beams optical field caustic Opto-Electronic Advances
2021, 4(3): 03200021
1 浙江师范大学物理与电子信息工程学院, 浙江 金华 321004
2 浙江省光场调控技术重点实验室, 浙江 杭州 310018
采用谱相位调制的方法,在理论上提出可调谐非傍轴自加速光束的产生方法,并通过实验对该理论进行验证。利用驻相近似和光学焦散线原理建立了谱相位与光束传输轨迹之间的数学模型。理论模拟和实验结果表明所提方法突破了传统傍轴近似的限制,产生了非傍轴自加速光束。这类轨迹灵活可控的自加速光束在光学微粒操纵、微粒运输和引导、超分辨成像等领域具有潜在的应用价值。
物理光学 光场调控 自加速光束 光学焦散线 驻相近似 相位调制 光学学报
2019, 39(10): 1026001
1 南开大学物理学院泰达应用物理研究院, 天津 300457
2 旧金山州立大学物理与天文系, 加利福尼亚 旧金山 94132
3 中国科学院光电研究院, 北京 100094
4 华北电光研究所固体激光技术重点实验室, 北京 100015
5 广西大学物理科学与工程技术学院广西相对论天体物理重点实验室, 广西 南宁 530004
实现自弯曲光乃至自回旋光一直是人们的梦想与科幻的题材。近年来，艾里光束以及推广的自加速光束因其无衍射、自弯曲传输以及自愈等奇异特性引起了人们极大的研究兴趣。这些光束的构想不仅得到了实验证实，而且具有广泛的应用前景，包括操控微纳颗粒、等离子体通道和表面等离子体激元、电子加速、精密成像、湍流传输、引导放电等，这些应用前景使得自加速光倍受青睐，成为一个广泛关注和激动人心的前沿热点课题。本文简单综述了基于相位调制的自加速光束的研究进展，包括自加速光束的产生和传输特性，以及其在空域和时域的推广与调控，并着重介绍自加速光在若干领域的新奇应用。
物理光学 相位调制 自加速光 艾里光束 无衍射 自弯曲 自修复 光学操控 光学学报
2016, 36(10): 1026009
