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| 1 | 光子辅助Fano共振隧穿周期双阱势特性显示文摘周期双阱势的光学性质是激光物理和量子光学的前沿研究领域之一。该文研究了具有时间周期双阱势的石墨烯系统中光子辅助狄拉克电子的Fano型共振隧穿。利用双量子阱结构,电子通过两量子阱之间的薄势垒的共振隧穿将导致束缚态能级的分裂,Fano型共振谱将分裂为两个不对称共振峰。通过改变相位、频率和振幅来调制Fano峰的形状,可以用来调制Dirac在石墨烯中的电子输运性质。数值分析表明,两个振荡场的相对相位可以调节非对称Fano型共振峰的形状。当相对相位从0增加到π时,共振峰谷从峰的一侧移到另一侧;在临界相位3π/11处,不对称共振峰变得对称。此外,还可以通过改变振荡场的频率和振幅以及静态势阱的结构来调制Fano峰的分布。这些有趣的物理性质可以用来调节石墨烯中Dirac的电子输运性质。 | 张永棠 | 2021 | 中国光学2021，14，5： | 2 |
| 2 | 操纵微纳颗粒的“光之手”--光镊技术研究进展显示文摘光镊是操纵微纳米尺寸颗粒的重要技术手段,已在物理、化学、生物及医学等领域得到广泛应用.综述近年来光镊领域的研究进展,系统介绍光镊研究的主要方向及代表性成果.介绍了光镊技术的理论基础,包括光镊捕获物体的作用机理和几种常用理论模型;按照产生光镊的光束类型将光镊技术分为结构光束光镊、多光束与全息光镊、近场倏逝波光镊、表面等离激元光镊、光纤光镊、热电光镊、飞秒激光光镊及异常光学力光镊,分别介绍各类光镊技术的特点和最新进展;介绍光镊技术在生物样品操纵、分子检测及裸眼三维显示等领域的创新应用,并对光镊技术发展进行总结和展望. | 闵长俊 袁运琪 张聿全 汪先友 张治斌 袁小聪 | 2020 | 深圳大学学报(理工版)2020，37，5： | 2 |
| 3 | Plasmonic tweezers: for nanoscale optical trapping and beyond显示文摘Optical tweezers and associated manipulation tools in the far field have had a major impact on scientific and engineering research by offering precise manipulation of small objects.More recently,the possibility of performing manipulation with surface plasmons has opened opportunities not feasible with conventional far-field optical methods.The use of surface plasmon techniques enables excitation of hotspots much smaller than the free-space wavelength;with this confinement,the plasmonic field facilitates trapping of various nanostructures and materials with higher precision.The successful manipulation of small particles has fostered numerous and expanding applications.In this paper,we review the principles of and developments in plasmonic tweezers techniques,including both nanostructure-assisted platforms and structureless systems.Construction methods and evaluation criteria of the techniques are presented,aiming to provide a guide for the design and optimization of the systems.The most common novel applications of plasmonic tweezers,namely,sorting and transport,sensing and imaging,and especially those in a biological context,are critically discussed.Finally,we consider the future of the development and new potential applications of this technique and discuss prospects for its impact on science. | Yuquan Zhang Changjun Min Xiujie Dou Xianyou Wang Hendrik Paul Urbach Michael G.Somekh Xiaocong Yuan | 2021 | Light(Science & Applications)2021，10，4： | 1 |
| 4 | Distance-controllable and direction-steerable opto-conveyor for targeting delivery显示文摘Opto-conveyors have attracted widespread interest in various fields because of their non-invasive and non-contact delivery of micro/nanoparticles.However,the flexible control of the delivery distance and the dynamic steering of the delivery direction,although very desirable in all-optical manipulation,have not yet been achieved by optoconveyors.Here,using a simple and cost-effective scheme of an elliptically focused laser beam obliquely irradiated on a substrate,a direction-steerable and distance-controllable opto-conveyor for the targeting delivery of microparticles is implemented.Theoretically,in the proposed scheme of the opto-conveyor,the transverse and longitudinal resultant forces of the optical gradient force and the optical scattering force result in the transverse confinement and the longitudinal transportation of microparticles,respectively.In this study,it is experimentally shown that the proposed opto-conveyor is capable of realizing the targeting delivery for microparticles.Additionally,the delivery distance of microparticles can be flexibly and precisely controlled by simply adjusting the irradiation time.By simply rotating the cylindrical lens,the proposed opto-conveyor is capable of steering the delivery direction flexibly within a large range of azimuthal angles,from-75°to 75°.This study also successfully demonstrated the real-time dynamic steering of the delivery direction from-45°to 45°with the dynamical rotation of the cylindrical lens.Owing to its simplicity,flexibility,and controllability,the proposed method is capable of creating new opportunities in bioassays as well as in drug delivery. | Zhen Che Wenguo Zhu Yaoming Huang Yu Zhang Linqing Zhuo Pengpeng Fan Zhibin Li Huadan Zheng Wenjin Long Wentao Qiu Yunhan Luo Jun Zhang Jinghua Ge Jianhui Yu Zhe Chen | 2020 | Photonics Research2020，8，7： | 1 |
| 5 | Controllable optofluidic assembly of biological cells using an all-dielectric one-dimensional photonic crystal显示文摘Opto-thermophoretic manipulation is emerging as an effective way for versatile trapping,guiding,and assembly of biological nanoparticles and cells.Here we report a new opto-thermophoretic tweezer based on an all-dielectric one-dimensional photonic crystal(1 DPC)for reversible assembly of biological cells with a controllable center.To reveal its ability of long-range optofluidic manipulation,we demonstrate the reversible assembly of many yeast cells as well as E.coli cells that are dispersed in water solution.The 1 DPC-based tweezer can also exert short-range optical gradient forces associated with focused Bloch surface waves excited on the 1 DPC,which can optically trap single particles.By combining both the optical and thermophoretic manipulation,the optically trapped single polystyrene particle can work as a controllable origin of the reversible cellular assembly.Numerical simulations are performed to calculate the temperature distribution and convective flow velocity on the 1 DPC,which are consistent with the experimental observations and theoretically confirm the long-range manipulations on the alldielectric 1 DPC platform.The opto-thermophoretic tweezers based on all-dielectric 1 DPC endow the microma-nipulation toolbox for potential applications in biomedical sciences. | FENGYA LU LEI GONG YAN KUAI XI TANG YIFENG XIANG PEI WANG DOUGUO ZHANG | 2022 | Photonics Research2022，10，1： | 0 |
| 6 | Off-axis optical levitation and transverse spinning of metallic microparticles显示文摘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. | YANSHENG LIANG SHAOHUI YAN ZHAOJUN WANG BAOLI YAO MING LEI | 2021 | Photonics Research2021，9，11： | 0 |
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