1 中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西 西安 710119
2 中国科学院大学,北京 100049
3 南京大学固体微结构物理国家重点实验室,南京大学物理学院,江苏 南京 210093
4 南京大学人工微结构科学与技术协同创新中心,江苏 南京 210093
5 浙江大学光电科学与工程学院,浙江 杭州 310027
光学超构表面凭借其小型化集成化的优势和对光场出色的调控能力,近年来已被深入应用于光学微操控技术研究,这标志着该交叉领域进入了新的发展阶段。特别地,由于超构表面的尺寸在亚波长级别,具有被光场驱动从而产生机械运动的潜力,这一特性为新一代光驱动的人工微机器人提供了重要的理论基础和技术支撑。本文依次从光学微操控的基本原理和超表面的相位机制出发,详细回顾了基于超构表面的多种微操控器件,包括超构表面光镊、多功能微操控系统、超构机械等,并结合微纳结构的拓扑光学性质,对拓扑光操控等新奇效应进行了探讨。最后,本文展望了超构表面微操纵技术的未来发展方向和目标。
超构表面 光学微操控 光镊 光子力学
光子学报
2023, 52(11): 1126001
光子学报
2021, 50(11): 1123001
Author Affiliations
Abstract
1 MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi’an Jiaotong University, Xi’an 710049, China
2 State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China
3 e-mail: yaobl@opt.ac.cn
Optical manipulation of metallic microparticles remains a significant challenge because of the strong scattering forces arising from the high extinction coefficient of the particles. This paper reports a new mechanism for stable confinement of metallic microparticles using a tightly focused linearly polarized Gaussian beam. Theoretical and experimental results demonstrate that metallic microparticles can be captured off the optical axis in such a beam. Meanwhile, the three-dimensionally confined particles are observed spinning transversely as a response to the asymmetric force field. The off-axis levitation and transverse spinning of metallic microparticles may provide a new way for effective manipulation of metallic microparticles.
Photonics Research
2021, 9(11): 11002144
中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室, 陕西 西安 710119
受激发射损耗显微技术(STED)作为一种远场超分辨显微成像技术, 具有几十纳米甚至几纳米的空间分辨率, 是细胞生物学等研究领域的重要成像工具。圆环形空心损耗光在物镜焦点附近的光场强度分布对STED空间分辨率起决定性作用。在高数值孔径物镜聚焦下, 光场的偏振态会对聚焦光场的强度分布产生显著的影响, 此外, 显微系统的轴外像差会严重破坏空心损耗光焦斑的中心对称性。基于矢量衍射理论, 理论模拟了在高数值孔径物镜聚焦条件下, 入射涡旋光的偏振态和光学系统中的彗差和像散对空心损耗光焦场强度分布的影响。实验上使用纯相位型空间光调制器来校准光学系统相差, 优化变形的损耗光, 利用纳米探针扫描焦点区域, 测量了其焦场强度分布。测量结果与由矢量稍微理论观测的结果一致。
显微 受激辐射损耗显微 超分辨 轴外像差 空间光调制器
中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室, 陕西 西安 710119
光镊技术具有无机械接触与高精度操纵微小尺度粒子的优点,自发明以来已逐渐成为生命科学和胶体物理学等领域中强有力的研究工具。随着研究的深入,传统的单光阱光镊已难以满足更高级的应用需求。近年来,空间光场调控技术通过对光场的振幅、相位和偏振态分布的调制,极大地丰富和增强了光学微操纵技术的功能,促进了包括激光微纳加工、微粒分选与输运、胶体粒子物理特性研究等方面的发展。从光场的振幅、相位和偏振态调制技术出发,综述近年来空间光场调控技术的发展及其在光学微操纵中的应用,重点介绍全息光镊、特殊模式光束微操纵、矢量光场微操纵等光学微操纵技术的研究进展。
全息 光学微操纵 光学捕获 空间光场调控 全息光镊 特殊模式光束 矢量光束 光学学报
2016, 36(10): 1026003
中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室, 陕西 西安 710119
在经典Gerchberg-Saxton(GS)算法的基础上,提出一种改进的快速三维GS 算法获取目标场的全息图(CGH)并用于全息光镊系统中,从理论和实验上充分证明了该算法的快速性和有效性。实验搭建了一套基于纯相位液晶空间光调制器(SLM)的全息光镊系统,实现了对酵母菌细胞和二氧化硅小球等微粒的多光阱、多平面三维稳定捕获和动态操纵。实验上还产生了具有强度梯度的线状光阱和光学涡旋光阱,实现了对微粒的运输和旋转操纵。这种可以对微粒实现多光阱、多平面动态三维操纵的全息光镊系统为生物、胶体物理等研究提供了一种新的微操纵工具。
全息 光学捕获 光镊 GS算法 计算机产生全息图
Author Affiliations
Abstract
1 State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China
2 Institut fur Technische Optik, Universitat Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany
3 Department of Bioengineering, Clemson University, Clemson-MUSC Bioengineering Program, Charleston, South Carolina 29425, USA
When structured illumination is used in digital holographic microscopy (DHM), each direction of the illumination fringe is required to be shifted at least three times to perform the phase-shifting reconstruction. In this paper, we propose a scheme for spatial resolution enhancement of DHM by using the structured illumination but without phase shifting. The structured illuminations of different directions, which are generated by a spatial light modulator, illuminate the sample sequentially in the object plane. The formed object waves interfere with a reference wave in an off-axis configuration, and a CCD camera records the generated hologram. After the object waves are reconstructed numerically, a synthetic aperture is performed by an iterative algorithm to enhance the spatial resolution. The resolution improvement of the proposed method is proved and demonstrated by both simulation and experiment.
Digital holography Holographic interferometry Interference microscopy Phase measurement Photonics Research
2014, 2(3): 03000087
Author Affiliations
Abstract
Bessel beam propagation in scattering media is simulated using the angular spectrum method combined with slice-by-slice propagation model. Generating Bessel beams with a spatial light modulator, which provides a means to adjust flexibly the parameters of the Bessel beam, allows us to validate the simulation results experimentally. The study reveals that the self-reconstructing length changes oppositely with the axicon angle (i.e., the larger the axicon angle, the shorter the self-reconstructing length). The radius of the incident beam has little influence on the self-reconstruction of the Bessel beam central lobe.
260.1960 Diffraction theory 170.3660 Light propagation in tissues 290.7050 Turbid media Chinese Optics Letters
2013, 11(11): 112601