Author Affiliations
Abstract
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China
All-dielectric metasurfaces are usually limited because of their static functionality and small scale. In this paper, we use an easy nanofabrication technique to fabricate all-dielectric metasurfaces with the advantages of having dynamic tunability and a large area. Using an anodized aluminum oxide (AAO) template as an evaporation mask, a large-area metasurface embedded in polydimethylsiloxane (PDMS) () is fabricated. The metasurface exhibits remarkable electric dipole (ED) and magnetic dipole (MD) resonances. Based on the solvent-swelling effect of PDMS in 20% toluene, the ED/MD resonance peak shifts dynamically to red. So far, to the best of our knowledge, a large-area metasurface embedded in PDMS and achieved by using the AAO template method has not appeared.
all-dielectric metasurface light manipulation nanodisk dynamic tunability Chinese Optics Letters
2023, 21(7): 073601
1 山东师范大学物理与电子科学学院，山东 济南 250014
2 苏州大学物理科学与技术学院，江苏 苏州 215006
结构光场的空域调控包括振幅、相位、偏振、相干度等丰富自由度，对其自由度的单一或联合调控引发了一系列新奇物理效应，在新型结构光场构建及多种领域中具有重要应用。相比于完全相干光场，部分相干光场在抵抗散斑噪声和大气湍流扰动等方面具有独特优势。近年来，具有新型相干结构的部分相干光束在大气传输、光学加密与成像、信息鲁棒传输、高质量光束整形等领域有着重要研究价值。本文详细综述了具有新型相干结构部分相干光场的理论构建与实验合成的研究进展，并重点介绍了新型相干结构光场在复杂环境中的鲁棒传输特性及其在光学加密、成像、鲁棒信息传输及光束整形中的应用研究进展。研究表明，新型相干结构光场调控不仅提供了一种有效抵抗复杂环境扰动的有效手段，而且丰富了光场调控技术在多种领域中的应用。最后，对新型相干结构调控技术发展趋势及潜在应用前景进行了展望。
光场调控 部分相干光场 相干结构调控 light manipulation partially coherent light coherence structure engineering 
Author Affiliations
Abstract
1 Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
2 Department of Chemistry, Dalhousie University, Halifax, NS B3H 4R2, Canada
3 School of Physical Science and Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
4 Department of Physics, University of Miami, Coral Gables, Florida 33146, USA
We suggest tailoring of the illumination’s complex degree of coherence for imaging specific two- and three-point objects with resolution far exceeding the Rayleigh limit. We first derive a formula for the image intensity via the pseudo-mode decomposition and the fast Fourier transform valid for any partially coherent illumination (Schell-like, non-uniformly correlated, twisted) and then show how it can be used for numerical image manipulations. Further, for Schell-model sources, we show the improvement of the two- and three-point resolution to 20% and 40% of the classic Rayleigh distance, respectively.
optical coherence imaging light manipulation Chinese Optics Letters
2021, 19(5): 052601
西北工业大学理学院陕西省光信息技术重点实验室，教育部空间应用物理与化学重点实验室, 陕西 西安 710072
光场的偏振态作为光场调控的一个新自由度，逐渐成为研究者们关注的热点。对光场偏振态的非均匀调制可以实现光子自旋-轨道相互耦合，从而发掘很多新的光学现象，其中Pancharatnam-Berry(PB)相位扮演了至关重要的角色。在偏振转换中，光场的不同偏振分量得到不同的PB相位。利用PB相位对光场偏振分量进行波前整形，以控制光场偏振分量的传输，从而在光场传输过程中实现偏振转换、角动量转化、能流控制等。光场偏振调制的相关研究在自旋选择成像、微粒操控、激光微加工、信息传输与修复中具有潜在的应用价值。分析了偏振调制光场的传输和控制原理，总结了近年来国内外的相关研究工作进展。
物理光学 偏振态 矢量光场 几何相位 光传输 光场调控 光学学报
2016, 36(10): 1026001
