Article
Optics
Junyi Wang, Fangfang Li, Guoguo Kang
Summary: This study demonstrates a simple method using a metasurface to achieve multiwavelength achromatic generation and focusing. By utilizing the extra degrees of freedom and multi-section design, multiwavelength achromatic super-resolution focusing in the far field has been achieved.
Article
Optics
Benjamin Perez-Garcial, Francisco Mecillas-Hernandez, Carmelo Rosales-Guzman
Summary: Complex vector modes of light, which are non-separable in both spatial and polarization degrees of freedom, are revolutionizing various research fields. Generating techniques for these modes have evolved dramatically, with computer-controlled devices such as digital micromirror devices becoming popular due to their low cost, polarization insensitivity, and high-refresh rates. In this manuscript, a novel technique utilizing a common-path interferometer is proposed, which achieves high stability. The experimental demonstrations include generating arbitrary vector modes on a higher-order Poincare sphere, generating vector modes in different coordinate systems, and generating various vector modes simultaneously. This technique has potential applications in optical manipulations, optical communications, optical metrology, and other fields.
Article
Optics
Xiao-Bo Hu, Si-Yuan Ma, Carmelo Rosales-Guzman
Summary: Complex vector modes have gained attention in various research fields for their fascinating properties and many applications. Digital holography and digital micromirror devices (DMDs) are flexible methods for generating such modes. A technique based on random encoding allows for high-speed generation of arbitrary vector beams, which will be of great relevance in research fields like optical communications, laser material processing, and optical manipulation.
Article
Optics
Xiao-Bo Hu, Carmelo Rosales-Guzman
Summary: Complex vector light modes with spatial variant polarization distribution have gained popularity recently due to their remarkable similarities with quantum entangled states. Digital micromirrors devices (DMDs) are highlighted for their value in the generation and characterization of complex vector light fields.
Article
Physics, Multidisciplinary
Danhua Liu, Changda Zhou, Peiyao Lu, Jilian Xu, Zhiyuan Yue, Shuyun Teng
Summary: This paper studies the generation of two types of vector beams based on metasurfaces, which have different polarization singularities. By designing metasurfaces consisting of rotated cross nanoholes, two kinds of vector beams were successfully generated.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Lijiao Guo, Zhiqing Feng, Yating Fu, Changjun Min
Summary: In this paper, a new approach for generating a vector beams array and dynamically manipulating the polarization state of the beam array is proposed based on a stable interferometric arrangement with a single reflective SLM. The experimental results demonstrate excellent agreement with the theoretical predictions, showing the system's capability in generating and controlling vector beams arrays with different polarization states. The system has great potential in various applications such as laser processing, optical trapping, and optical communications.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
S. Ramakrishna, J. Hofbrucker, S. Fritzsche
Summary: In this study, we analyze the photoexcitation of atoms with a single valence electron by cylindrically polarized Laguerre-Gaussian beams. We show the variation of electric-quadrupole field sub-components in the beam cross section with beam waist and radial distance from the beam axis. The calculations reveal that the excitation rate is sensitive to both the beam waist and the distance between the target center and the beam axis. However, the excitation by a cylindrically polarized Laguerre-Gaussian beam is found to be more efficient in driving electric-quadrupole transition in the atomic target compared to circularly polarized beams.
Article
Optics
Ruijian Li, Yuan Ren, Rusheng Sun, Jie Zhao, Chen Wang, Zhengliang Liu, Tong Liu
Summary: We propose a new method to generate ultra-high polarization-order vector vortex beams and verify the experimental results.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yue Liu, Li Chen, Chengxin Zhou, Kuangling Guo, Xiaoyi Wang, Yuhan Hong, Xiangbo Yang, Zhongchao Wei, Hongzhan Liu
Summary: In this study, a spin-multiplexed metadevice combining propagation phase and Pancharatnam-Berry phase is demonstrated based on an all-dielectric transmission metasurface platform. The metadevice generates multidimensional focused optical vortex beams by modulating the phase and successfully realizes the multiplexing of these vortex beams. Additionally, the superposition of multiple orbital angular momentum states produces vector vortex beams with different modes.
Article
Chemistry, Multidisciplinary
Shuo Xu, He-Xiu Xu, Yanzhao Wang, Jian Xu, Chaohui Wang, Zhichao Pang, Huiling Luo
Summary: This study proposes a hybrid method to achieve multiple vortex beams with different modes in a planar microstrip array, which has great significance for wireless and radar communication systems.
Article
Chemistry, Multidisciplinary
Xujing Liu, Yinhui Kan, Shailesh Kumar, Liudmilla F. Kulikova, Valery A. Davydov, Viatcheslav N. Agafonov, Changying Zhao, Sergey I. Bozhevolnyi
Summary: This article introduces a new design for ultracompact single-photon sources, which can generate linearly polarized vortex beams using quantum emitter-coupled metasurfaces. The authors successfully demonstrate on-chip single-photon generation and realize the multiplexing of different topological charges of orthogonal linearly polarized single photons through multiple channels, demonstrating their entanglement. This research suggests that ultracompact quantum emitter-coupled metasurfaces have the potential to be a new quantum optics platform for chip-integrated high-dimensional single-photon sources.
ADVANCED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
E. M. El Halba, Z. Hricha, A. Belafhal
Summary: The focusing properties of a cylindrically polarized higher-order Generalized Spiraling Bessel beam (GSBB) by a high numerical aperture lens system are investigated and discussed numerically. It is found that the focused beam can have a multi-ringed dark hollow profile and a flat-top profile, and the properties can be controlled by adjusting various parameters. The focusing properties of the higher-order GSBB may find applications in laser scanning microscopy, micro-particle manipulation, and optical data storage.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Optics
Kunhao Ji, Di Lin, Ian A. Davidson, Siyi Wang, Joel Carpenter, Yoshimichi Amma, Yongmin Jung, Massimiliano Guasoni, David J. Richardson
Summary: Higher-order Poincare sphere (HOPS) beams with spatially variable polarization and phase distributions have unique applications in optical communication and microscopy. Generating these beams with high peak power from compact laser systems remains a challenge. In this study, we demonstrate the controlled generation of HOPS beams using coherent beam combination from an Yb-doped multicore fiber (MCF) amplifier, achieving peak powers up to 14 kW for similar to 92 ps pulses.
PHOTONICS RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Zhe Shen, Shijie Huang
Summary: This study demonstrates the generation and focusing of azimuthally polarized vortex beams using a single-layer all-dielectric metalens based on Pancharatnam-Berry (PB). By adding phase or amplitude modulation, optical needles with different depths of focus and sizes can be achieved. The results suggest potential applications of this technique in super-resolution imaging, photolithography, and particle trapping.
Article
Optics
Peizhi Sun, Binghui Liu, Yifei Wang, Conglong Yuan, Shuzhen Jia, Dong Shen, Zhi-Gang Zheng
Summary: This work proposes a creative paradigm to generate ultrabroadband multichannel vector vortex beams (VVBs) by programming the electric field vector through photopatterning of twisted nematic liquid crystals. The multichannel VVBs have been demonstrated to propagate along an unprecedented bandwidth over 1000 nm and can be optionally regulated in either a reversible or irreversible manner. This methodology has promising applications in photonics, quantum science, and fundamental physics.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Chemical
Yuxuan Ren, Steven J. Hersch, Xiao He, Rufan Zhou, Tao G. Dong, Qingye Lu
Summary: This study successfully synthesized a lightweight and robust metal-organic framework/cellulose aerogel composite with good reusability and potential for wastewater treatment and antibacterial applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Optics
Hao-Dong Wang, Wen Bai, Bu Zhang, Bo-Wei Li, Feng Ji, Min-Cheng Zhong
Summary: This study examines the transverse forces of an optothermal trap in front of a gold film and divides the optothermal forces into optical force and thermal force. The results show that both optical and thermal trapping forces increase as laser power increases, with the optical trapping force being greater. Further experiments reveal that convective flow occurs later than thermophoretic flow.
Article
Optics
Xudong Guo, Yu-Xuan Ren, Li Li, Zihui Wang, Shenzhi Wang, Mingyan Gao, Zuobin Wang, Kenneth K. Y. Wong
Summary: Ultrathin broadband absorbers with a near-uniform low reflectivity play a crucial role in optical applications. A new technique for large-scale fabrication of quasi-random Mie resonators using a high-throughput laser interference induced quasi-random patterning (LIIQP) technique is presented. The fabricated ultrathin absorber exhibits a near-uniform broadband reflectivity below 3% over a 400-1100 nm spectrum region. This technique enables the rapid production of quasi-random dielectric Mie-resonant metasurfaces with promising applications in thin-film solar cells, display, and imaging.
Review
Energy & Fuels
Yuxuan Ren, Rufan Zhou, Ruijie Yang, Tao G. G. Dong, Qingye Lu
Summary: Rational and sustainable utilization of resources is critical for society's development. Solar energy, as a renewable source, has potential to replace traditional energy supplies. Interfacial solar evaporation, which utilizes solar energy for clean water production, shows promise due to its high efficiency and adaptability. Recent progress in materials and design strategies for interfacial solar evaporators is reviewed, with a focus on photothermal conversion mechanisms and key factors such as water transport and thermal management.
Article
Biochemistry & Molecular Biology
Xiao Xiao, Yuxuan Ren, Kaili Wang, Zhe Ling
Summary: Researchers have successfully fabricated multi-functional nanocomposite films based on cellulose nanocrystals, which exhibit high optical haze, organic pollutant detection, and emulsion separation capabilities. The films demonstrate high transparency and optical haze due to the ordered arrangements of cellulose nanocrystals. The grafting of hydrophobic molecules onto the surface of the films improves their mechanical strength and separation efficiency.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Instruments & Instrumentation
Bu Zhang, Xian-Feng Zhang, Meng Shao, Chun Meng, Feng Ji, Min-Cheng Zhong
Summary: In this paper, an opto-thermal approach is developed to assemble yeast cells dispersed in solution, and the effect of the initial concentration ratio on the assembly pattern is investigated. The results show that the velocity ratio of yeast cells to light absorbing particles is the dominant factor in the area ratio of yeast cells in the binary aggregate.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Biology
Tongrui Hao, Nan Feng, Fan Gong, Yang Yu, Jiaquan Liu, Yu-Xuan Ren
Summary: By applying minute force on the tethered SNARE complex through optical tweezers, the study investigates the role of CpxI in the dynamic assembly of SNARE complex and reveals different interplay mechanisms between CpxI fragments and the complex. It is found that the N-terminal domain of CpxI plays a dominant role in the facilitation function, while CTD is mainly involved in clamping. Furthermore, complexin-1 shapes the assembly of the Synaptic-soluble N-ethylmaleimide-sensitive factor Attachment Receptor through coordination of multiple domains.
COMMUNICATIONS BIOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Dong Fang, Yanfang Tan, Yuxuan Ren, Shuchao Zheng, Fengming Xiong, Anchen Wang, Kai Chang, Baoxiu Mi, Dapeng Cao, Zhiqiang Gao
Summary: This paper investigates the preparation of Cs2SnI6 powder and its application in solid-state dye sensitized solar cells. It is found that the use of certain solvents can result in highly pure and thermally stable Cs2SnI6 products, while others can cause deterioration. Furthermore, the study reveals that the performance of Cs2SnI6-based solid-state dye sensitized solar cells is closely related to its gap states.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Meng Shao, Rui Liu, Changxu Li, Zhe Chai, Zhensheng Zhong, Fengya Lu, Xunbin Wei, Jinhua Zhou, Min-Cheng Zhong
Summary: Optical tweezers are useful tools for non-contact cell manipulation, but currently limited to light-permeable organs. This study demonstrates the use of optical tweezers combined with oblique back-illumination microscopy to trap and evaluate erythrocyte deformability in opaque tissues.
APPLIED PHYSICS LETTERS
(2023)
Article
Energy & Fuels
Rufan Zhou, Yuxuan Ren, Qingye Lu, Nader Mahinpey
Summary: A novel Ru/CeO2 catalyst was synthesized through a microwave-assisted hydrothermal method and exhibited excellent reactivity and stability in low-temperature dry reforming of methane reactions. The catalyst showed high conversion rates of CH4 and CO2, and maintained its stability without coke deposition on the catalyst surface.
Article
Ecology
Yingchun Lv, Xiaoyao Li, Yuxuan Ren, Haibin Hui, Gang Xu
Summary: Coastal wetlands play an important role in intercepting and retaining phosphorus from upland sources to prevent excessive phosphorus into coastal water. This study investigated the phosphorus storage capacity of wetlands in the Yellow River Delta by collecting sediment and profile samples. The results showed that restored wetlands had a higher phosphorus storage capacity compared to non-restored wetlands, primarily due to increased sediment organic matter content resulting from freshwater restoration. Wetlands with higher vegetation cover exhibited higher phosphorus storage capacity, while the capacity did not vary significantly during different periods of plant growth. The phosphorus storage capacity significantly decreased with sediment depth in both restored and non-restored wetlands.
Article
Biochemical Research Methods
Rui Liu, Meng Shao, Zeyu Ke, Changxu Li, Fengya Lu, Min-cheng Zhong, Yuxin Mao, Xunbin Wei, Zhensheng Zhong, Jinhua Zhou
Summary: Measuring the deformability of RBCs is crucial for transfusion and gas transport ability of RBCs during storage. However, traditional methods have low efficiency in measuring the deformability of RBCs with different morphologies. This study developed a cost-effective device and successfully measured the deformability of RBCs with different morphologies.
BIOMEDICAL OPTICS EXPRESS
(2023)
Article
Instruments & Instrumentation
Chun Meng, Meng Shao, Xian-Feng Zhang, Lian-Sheng Zhang, Dong Chen, Min-Cheng Zhong
Summary: We propose an optical method that uses two tilted-focused beams to manipulate microparticles. Firstly, the action on microparticles is studied using a single tilted-focused beam, which drives the directional motion of a dielectric particle. Secondly, two tilted-focused beams with the same power and complementary tilt angles are used to assemble an optical trap, allowing for optical trapping of dielectric particles and opto-thermal trapping of light absorbing particles. The trapping mechanism involves the balance of forces exerted on the particles, including optical scattering force, optical gradient force, gravity, and thermal gradient force. The trap center is away from the focal spots, preventing the laser beam from being focused on the trapped object.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Materials Science, Multidisciplinary
Huade Mao, Yue Yu, Yu-Xuan Ren, Ka Yan Chan, Jiqiang Kang, Xiankai Sun, Edmund Y. Lam, Kenneth K. Y. Wong
Summary: The article introduces a method for optimizing computer-generated holograms using a convolutional neural network. By fabricating the holograms into metasurfaces, lensless image projection can be achieved. The neural optimizer is shown to be 400 times faster than theoretical computation and reduces time complexity. It lowers the error rate from over 10% to 1.38% and significantly decreases the running time. This neural optimizer is expected to have a crucial role in lensless image projection and real-time metasurface pattern design.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Chemistry, Physical
Meng Shao, Rui Liu, Changxu Li, Yue Sun, Zhensheng Zhong, Fengya Lu, Jinhua Zhou, Min-Cheng Zhong
Summary: Quantitative evaluation of the impact of different diluents on the elasticity characteristics of mouse erythrocytes was conducted using optical tweezers. The results show that, although the erythrocytes remained intact in the selected diluents, their deformability changed in different diluents.
