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three-dimensional array optical tweezers based on array phase modulation

OPTICS AND LASER TECHNOLOGY 2025年 184卷

作者： Tian, Wenyue Zhu, Linwei Xue, Zhenfa Wang, Wenpeng Yu, Junjie Ludong Univ Sch Phys & Optoelect Engn Yantai 264025 Peoples R China Chinese Acad Sci Shanghai Inst Opt & Fine Mech State Key Lab High Field Laser Phys Shanghai 201800 Peoples R China Chinese Acad Sci Shanghai Inst Opt & Fine Mech Aerosp Laser Technol & Syst Dept Shanghai 201800 Peoples R China

This study presents a method for generating a three-dimensional (3D) array of multifocal spots within a highnumerical aperture (NA) optical system without the influence of zero-order light is proposed, facilitating the creation of a 3D array optical tweezers system capable of trapping multiple particles simultaneously. By integrating a two-dimensional (2D) transverse multifocal spot array with a one-dimensional (1D) longitudinal multifocal spot array, a technique is proposed employing a continuous phase grating combined with an areadivided phase encoding method. This approach enables phase-only modulation to generate the desired 3D multifocal spots array with controllable intensity, representing significant progress for applications requiring high precision in particle manipulation. In the experimental demonstration, arrays of silica microspheres were successfully trapped and dynamically manipulate using the proposed multifocal spots array encoding. Specifically, a 3 x 3 x 3 array and a 5 x 5 array were stably trapped, and a 1 x 2 three-column array is dynamically manipulated, showcasing the system's capability to manipulate a large number of particles in a 3D configuration. The optical tweezers system presented herein holds great potential for applications in optical micromanipulation, microscopy, and the study of crystal materials. The experimental results validate the theoretical simulations and demonstrate the effectiveness of the 3D array optical tweezers system in achieving stable and precise particle capture.

关键词： Optical trapping Phase modulation Spatial light modulator three-dimensional array

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New three-dimensional memory array architecture for future ultrahigh-density DRAM

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IEEE JOURNAL OF SOLID-STATE CIRCUITS 1999年第4期34卷 476-483页

作者： Endoh, T Shinmei, K Sakuraba, H Masuoka, F Tohoku Univ Elect Commun Res Inst Aoba Ku Sendai Miyagi 9808577 Japan

In this paper, a three-dimensional (3-D) memory array architecture is proposed. This new architecture is realized by stacking several cells in series vertically on each cell located in a two-dimensional array matrix. Therefore, this memory array architecture has a conventional horizontal row and column address and new vertical row address. The total bit-line capacitance of this proposed architecture's DRAM is suppressed to 37% of normal DRAM when one bit-line has 1-Kbit cells and the same design rules are used. Moreover, an array area of 1-Mbit DRAM using the proposed architecture is reduced to 11.5% of normal DRAM using the same design rules. This proposed architecture's DRAM can realize small bit-line capacitance and small array area simultaneously. Therefore, this proposed 3-D memory array architecture is suitable for future ultrahigh-density DRAM.

关键词： bit-line capacitance DRAM stacked surrounding gate transistor (S-SGT) surrounding gate transistor (SGT) three-dimensional array

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Investigation of fluid-structure interaction of micropillars in a three-dimensional microfluidic DLD array

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JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING 2024年第9期46卷 1-21页

作者： Ganesan, Sanchanna Kumar, C. Likith Juliet, A. Vimala SRM Inst Sci & Technol Coll Engn & Technol Dept Elect & Instrumentat Engn Kattankulathur Campus Chennai 603202 Tamil Nadu India

Deterministic lateral displacement (DLD) is a microfluidic passive method for bioparticle separation and isolation, based on particle size and shape with high sample volume and low latency. Despite widespread application and research, experts report various fundamental, practical, and commercial challenges faced in the field of DLD represented in the literature. One of the fundamental challenges is the fluid's flow behaviour and the fluid-structure interaction inside the DLD array. To address this problem, this paper investigates the modelling of a three-dimensional DLD array constructed by considering lateral displacements and wall boundaries. Nine different geometric shapes of the symmetrical pillars are reported in the literature opted for the study which are examined with different velocities to analyse how pillar shape impacts the flow patterns inside the DLD array. Also, an investigation of the two-way interaction between the fluid and the pillar structure is carried out. The response of the fluid due to the interaction with the pillar and the pillar response due to the interaction with the fluids is reported. Additionally, the realistic influence of the fluid flow and the surrounding pillars on the middle pillar in the array are examined in 3D simulations. The simulation was carried out using the finite element software COMSOL Multiphysics.

关键词： Fluid-structure interaction (FSI) Deterministic lateral displacement (DLD) three-dimensional array Particle separation Micropillars

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Spatial dispersion in metamaterials based on three-dimensional arrays of spheres and disks

Spatial dispersion in metamaterials based on three-dimension...

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International Conference Days on Diffraction

作者： Chebykin, Alexander V. Gorlach, Maxim A. Gorlach, Alexey A. Belov, Pavel A. ITMO Univ St Petersburg Russia Belarusian State Univ Minsk 220050 BELARUS

ISBN: (纸本)9781467386302

We consider the effect of spatial-dispersion-induced birefringence in metamaterial composed of isotropic spheres located in the sites of a cubic lattice. Strong anisotropy of such metamaterial due to nonlocality is demonstrated both numerically and analytically. For metamaterial composed of dielectric disks, we explore electromagnetic modes that are not captured by the local effective medium model, namely, the longitudinal magnetic mode.

关键词： Dielectrics Dispersion Lattices Magnetic materials Mathematical model Metamaterials Predictive models left-handed materials Dielectrics crystal lattices Magnetic materials Prediction models spatial dispersion Mathematical Model Spheres disks cultivators three-dimensional array dispersion Dispersion

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3D IDENTIFICATION OF ACOUSTIC SOURCES IN ROOMS USING A LARGE-SCALE MICROPHONE array 16

3D IDENTIFICATION OF ACOUSTIC SOURCES IN ROOMS USING A LARGE...

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16th International Workshop on Acoustic Signal Enhancement (IWAENC)

作者： Demontis, Hugo Ollivier, Francois Marchal, Jacques Sorbonne Univ CNRS Inst Jean Rond Alembert UMR 7190 F-75005 Paris France

ISBN: (纸本)9781538681510

The paper describes the implementation of a large three-dimensional array of microphones to estimate the directivity pattern of sound sources in reverberant environments. In the presented experiment, the microphones are flush mounted on the walls of a rectangular room. In order to identify the directivity pattern of a complex source located inside the room, an adapted beamforming method is proposed. Early reflections are considered to approximate the propagation path in the room, useful to solve accurately the inverse problem. Firstly, the source location is estimated inside the room. A set of pressure signals is processed onto a virtual point sphere surrounding the source. From this set, a sparse representation of the source is computed using spherical harmonics decomposition. Because the estimate of the DP highly depends on the centering of the SH basis, an optimization step is performed to match the center of the sphere with the source location. The radiation pattern of an unbaffled loudspeaker is evaluated to assert the efficiency of the method.

关键词： Room acoustics three-dimensional array beamforming source identification

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Comparisons between 2D and 3D Uniform array Antennas

Comparisons between 2D and 3D Uniform Array Antennas

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Federated Conference on Computer Science and Information Systems (FedCSIS)

作者： Vesa, Andy Alexa, Florin Balta, Horia POLITEHN Univ Dept Commun V Parvan 2 Timisoara 300223 Romania

ISBN: (纸本)9788360810668

For any wireless communications antenna system becomes indispensable. In this paper we analyzed linear array, planar array and three - dimensional (3D) array antennas. The array systems are simulated in Matlab based on uniform linear array antennas. Comparisons between planar array antenna and 3D array antenna are provided take into account different phases of currents injected in antenna elements. Also we propose to use the array antenna in WSN due to the advantages in signal to noise ratio and power consumption.

关键词： planar antenna arrays radio networks 2D uniform array antennas 3D array antenna 3D uniform array antennas Matlab WSN antenna elements planar array antenna power consumption signal to noise ratio uniform linear array antennas wireless communications antenna system Antenna radiation patterns arrays Linear antenna arrays Planar arrays three-dimensional displays Wireless sensor networks planar antenna arrays Wireless sensor networks Planar antennas antenna element linear antenna arrays signal to noise ratios three-dimensional displays antenna radiation patterns MATLAB WSN gene Radio networks Power consumption Antenna arrays ANTENNA three-dimensional array

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Antenna array manifold: A simplified representation 25

Antenna array manifold: A simplified representation

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IEEE International Conference on Acoustics, Speech, and Signal Processing

作者： Sleiman, A Manikas, A Univ London Imperial Coll Sci Technol & Med Dept Elect & Elect Engn London SW7 2BT England

ISBN: (纸本)0780362934

The array manifold vector is one of the most important parameters of an array system. For a general non-linear array of sensors. (i.e. a two or thrice dimensional array geometry), the locus of dir manifold vectors is a hypersurface embedded in a multidimensional complex space, with parameters of interest the azimuth and elevation angles. in this paper, a simplified representation of this complex hypersurface on a real two-dimensional plane is presented. This simplification/mapping, using concepts from differential geometry, maintains the main characteristics of the original array manifold surface and has the potential of providing new grounds for design and analysis of array systems. In this study, both planar and three-dimensional :arrays of omnidirectional sensors will be considered.

关键词： Manifolds hypersurface Differential Geometry linear arrays arrays Antenna arrays azimuth Sensors Planar three-dimensional array

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Optimization of Directivity, Realized Gain and Efficiency for Multi-dimensional Antenna array 97

Optimization of Directivity, Realized Gain and Efficiency fo...

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97th IEEE Vehicular Technology Conference (VTC-Spring)

作者： Zhu, Qian Ni, Rui Yang, Ganghua Lie, Qiang Cent Res Inst Wireless Technol Lab Shenzhen Peoples R China Peng Cheng Lab Dept Broadband Commun Shenzhen Peoples R China

ISBN: (纸本)9798350311143

The phenomena of superdirectivity is explored for subwavelength spaced antenna subarrays. Then a larger multi-dimensional antenna array is composed to achieve higher directivity and better beamforming performance. Different methods for optimizing directivity, realized gain and total efficiency of arbitrary antenna array are investigated and applied in the design of such multi-dimensional array. All the results in this paper are verified by commercial full-wave simulator.

关键词： superdirective antenna multi-dimensional array three-dimensional array mutual coupling convex optimization

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Surface lattice resonance in three-dimensional plasmonic arrays fabricated via self-assembly of silica-coated gold nanoparticles

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JOURNAL OF COLLOID AND INTERFACE SCIENCE 2023年 633卷 226-232页

作者： Hasegawa, Masashi Watanabe, Kanako Namigata, Hikaru Welling, Tom A. J. Suga, Keishi Nagao, Daisuke Tohoku Univ Dept Chem Engn 6-6-07 AobaAramaki azaAoba ku Sendai Miyagi 9808579 Japan Univ Utrecht Debye Inst Nanomat Sci Mat Chem & Catalysis Univ sweg 99 NL-3584 CG Utrecht Netherlands

Hypothesis: three-dimensional plasmonic nanoparticle arrays in which the nanoparticles are assembled with a certain distance apart are expected to exhibit unique optical properties attributed to surface lattice resonances because of the interactions between the nanoparticle layers. Experiments: Multi-layered gold nanoparticle arrays were created to experimentally prove surface lattice resonances from three-dimensional arrays. Silica-coated gold nanoparticles were employed as building blocks for the array because the distance between the nanoparticles can be tuned by adjusting the thick-ness of the silica coating. Employing highly monodisperse building blocks enabled to fabricate both single-layered and multi-layered plasmonic arrays via a confined convective assembly method. Findings: Multi-layering of monodisperse building blocks brought about some additional peaks corre-sponded to Bragg diffraction of gold nanoparticle periodic array and the interactions between layers in a hexagonal close-packed structure of the nanoparticles, respectively. Most importantly, the multi -layered arrays exhibited a distinctive extinction peak at the same wavelength as that observed from the single-layered array, proving the realization of surface lattice resonances from the three-dimensional plasmonic array.(c) 2022 Elsevier Inc. All rights reserved.

关键词： Surface lattice resonance Plasmonic nanoparticle three-dimensional array Plasmonic material Self-assembly

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Fabrication of three-dimensionally close-packed aggregate of particles under mechanical vibration

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MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS 2009年第1-3期161卷 193-197页

作者： Muto, Hiroyuki Kimata, Koji Murata, Kohei Daiko, Yosuke Matsuda, Atsunori Sakai, Mototsugu Toyohashi Univ Technol Dept Mat Sci Toyohashi Aichi 4418580 Japan

A fabrication process for making three-dimensionally close-packed structures Of SiO(2)-microparticles was proposed by utilizing external mechanical vibration. An experimental device was designed to make three-dimensional arrays through vibrating colloidal particles in suspension. The optimum condition for the vibration was examined to yield the most sufficient close-packed structures in their large dimensions. The experimental technique proposed in this study is efficient tool for eliminating defects undesirably induced and included in the particulate aggregates with close-packed structures. The microscopic processes of the formation of three-dimensionally ordered aggregates were also examined using the discrete element method (DEM). The experimental observations for the nucleation and the growth of close-packed structures associated with appropriate mechanical vibrations were well realized in the DEM simulation, suggesting the useful information on the efficient engineering fabrication of close-packed structures of particulate aggregate. (C) 2009 Elsevier B.V. All rights reserved.

关键词： Microparticle Simulation Discrete element method three-dimensional array

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