共查询到19条相似文献,搜索用时 296 毫秒
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微流控光学是在微尺度上通过操控微流体达到调节系统光学特性的技术。微流控光开关在多个元件集成到单一微流控芯片并实现可重构的微流控光路中起重要作用。使用气动方式设计了一种光路可重构的2×2光开关。通过压缩气体驱动控制一个可调气隙反射镜的状态,使光在微流道内交替发生透射和全反射,实现光开关功能。通过在COMSOL软件中仿真分析,得出其消光比为10.2dB、开关周期可达到60ms。结果显示,该方法具有较好的开关性能。此开关可与其他器件集成,制作复杂的微流控器件以实现其他不同的功能。 相似文献
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采用液体作为光学器件元素,以微流控技术、电磁驱动技术及MOEMS技术相结合,提出一种新颖的可调光衰减器结构.通过电磁驱动装置控制衰减器中微流体的位置,实现光能量的可调衰减.以电磁驱动方式控制衰减器的调节,它的工作电压小、驱动行程大,且控制电路较为简单.该衰减器具有体积小、衰减范围大的特点,有利于光衰减器的集成化、微型化及制作. 相似文献
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高速光流控成像是融合了高速光学成像和微流控的新兴交叉技术,能够对高速复杂流体环境中的生物体进行高分辨率、高通量和多信息维度的成像和定量检测分析,在生物能源、食品科学、药物筛选、疾病诊断等领域展现出卓越的应用前景。对高速光流控成像的基本原理、关键技术和前沿进展进行综述,并对该技术未来的发展趋势和面临的挑战进行展望。 相似文献
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随着微流控技术的日趋成熟,将微流控芯片技术和光微流方法在微结构光纤中进行交叉融合,已经逐渐形成了一个新的发展方向。简要综述了这一技术是如何从初期的利用微结构光纤的特殊结构,进行简单的功能集成,拓展到如今基于特殊需求进行光纤的功能设计的新阶段,以实现在微结构光纤内部构造微流控感测系统的目的。该方向的发展,不仅促进了光波导与微流物质检测技术相结合,还为实现不同检测原理在微结构光纤内的高灵敏度光纤微流传感器技术开辟了新方法与新途径。 相似文献
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指出微全分析系统已成为国际关注的焦点,它正向着微型化、集成化、便携化、自动化方向发展。它使许多不连续的分析过程连续化和自动化,完成实时及在位分析,实现高效率、快速度、少耗样、低成本、无污染、大批量生产的目标。目前,微流控芯片主要应用于医学临床诊断、新型药物的研制与开发以及环境监测等领域。着重介绍了微流控分析芯片的特点、工作原理及其分类,最后强调了微流控分析芯片的发展和应用。 相似文献
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首先介绍了较为常用的几种光开关的工作原理、特点和应用。描述了MEMS、MOEMS、微流控技术。以MOEMS及微流控技术相接合,提出一种新的微流控光开关阵列结构,通过电控方法改变微流控芯片波导结构,实现光路变化。该光开关具有体积小,结构简单,功率损耗低,有利于光开关阵列集成化、微型化及制作。以电控方式控制光开关,在开关速度上比温控更快、更稳定,且控制电路简单等特点易构成大容量交换矩阵。 相似文献
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Lee Hartley Karan V. I. S. Kaler Orly Yadid-Pecht 《IEEE transactions on circuits and systems. I, Regular papers》2007,54(1):99-110
Reported are motivations and approaches for the integration of custom sensors with microfluidic devices for cytometry on a chip and related fluid metering applications. To demonstrate, details of a digital 16-element mixed-signal CMOS active pixel optical sensor with adaptive spatial filtering is first described. The 0.18-mum CMOS fabricated sensor is then shown coupled to a microfluidic channel via a polymer encapsulated chip-on-board approach as well as a preferred flip-chip-on-glass hybrid integration approach. However, both approaches discussed possess attributes that are well suited for reliable high-volume production. Utilizing these two disparate assembly topologies, the intelligent sensor's general behavior, optical input dynamic range, and near-field sensitivity to polymer beads being transported in a microfluidic channel is explored. The findings suggest that discrete near-field sensor integration with microfluidics is a well-positioned integration approach for helping to obviate the need for precision analog-to-digital conversion, optical fiber microchannel coupling, and conventional microscopy for a set of relevant micro total analysis system applications. By opting instead for a hybrid multichip module approach to system integration, this study marks a slight departure in strategy relative to many common monolithic system-on-chip integration efforts 相似文献
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Optofluidics is the integration of optics and microfluidics(so-called lab on the chip). Wherein the actuation of liquid is a key technic. In a variety of methods for controlling microscale liquid, the light actuation is particularly interesting. The light actuation offers a novel way to control the flow of fluids for biomedical and biotechnological applications, etc.. The complexity and cost of devices sometimes may be greatly reduced by using complete optical control and may be more flexible in operation than other methods. However the light actuation of liquid is a burgeoning field as well as optofluidics. There is lots of work to do. Here we systematically describe four mechanisms for the light actuation of liquid based on the following points: optoelectrowetting, photothermal effect, radiation pressure, photosensitive substance. 相似文献
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集成光学国际研究进展 总被引:1,自引:0,他引:1
介绍了集成光学基本概念及其主要应用领域,分析了集成光学国际研究现状。在理论研究方面,对新型器件的设计、计算和模拟以及基于固体物理学和波动光学的基础理论研究是目前研究热点;而在器件研究方面,通信及传感器件是目前的研究热点。同时还分析了集成光学器件的发展趋势,指出光学双稳态集成器件以及新一代集成光学传感器的研究将是未来集成光学器件的一个研究热点。 相似文献
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Carla Spatola Rossi Frederic Coulon Shaohua Ma Yu Shrike Zhang Zhugen Yang 《Advanced functional materials》2023,33(21):2212081
Rapid, sensitive, and selective detection of live pathogens remains a key priority for quality control and risk assessment. While conventional methods often require complicated workflows, costly reagents, lab equipment, and are time-consuming, rendering them inadequate for field testing and low-resource settings. Increased attention has been drawn to developing alternative low-cost and rapid methods to detect on-site live pathogens in different environmental matrices. Among them, microfluidic devices that integrate various laboratory functions in a miniaturized manner have proven to be a promising tool for the rapid and sensitive detection of pathogens. Herein, the development of microfluidic devices specifically designed for the detection of live pathogens is discussed along a concise summary of novel microfluidics systems recently developed, contrasted to conventional methods regarding assay time, the limit of detection, and target organisms. These include a variety of micro total analysis systems (µTAS) and microfluidic paper-based analytical devices (µPADs) in combination with molecular methods and traditional live cell detection techniques, such as cell culture, DNA intercalating dyes, resazurin, and immobilized bioreceptors (e.g., aptamers and capture antibodies). Furthermore, insights on the future perspectives of microfluidics for live pathogen detection with a highlight on the rapid and low-cost method development for field testing are provided. 相似文献
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Hao Wang Wang Zhang Dimitra Ladika Haoyi Yu Darius Gailevičius Hongtao Wang Cheng-Feng Pan Parvathi Nair Suseela Nair Yujie Ke Tomohiro Mori John You En Chan Qifeng Ruan Maria Farsari Mangirdas Malinauskas Saulius Juodkazis Min Gu Joel K. W. Yang 《Advanced functional materials》2023,33(39):2214211
The rapid development of additive manufacturing has fueled a revolution in various research fields and industrial applications. Among the myriad of advanced 3D printing techniques, two-photon polymerization lithography (TPL) uniquely offers a significant advantage in nanoscale print resolution, and has been widely employed in diverse fields, for example, life sciences, materials sciences, mechanics, and microfluidics. More recently, by virtue of the optical transparency of most of the resins used, TPL is finding new applications in optics and photonics, with nanometer to millimeter feature dimensions. It enables the minimization of optical elements and systems, and exploration of light-matter interactions with new degrees of freedom, never possible before. To review the recent progress in the TPL related optical research, it starts with the fundamentals of TPL and material formulation, then discusses novel fabrication methods, and a wide range of optical applications. These applications notably include diffractive, topological, quantum, and color optics. With a panoramic view of the development, it is concluded with insights and perspectives of the future development of TPL and related potential optical applications. 相似文献
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Microfluidics meets MEMS 总被引:8,自引:0,他引:8
Verpoorte E. De Rooij N.F. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2003,91(6):930-953
The use of planar fluidic devices for performing small-volume chemistry was first proposed by analytical chemists, who coined the term "miniaturized total chemical analysis systems" (/spl mu/TAS) for this concept. More recently, the /spl mu/TAS field has begun to encompass other areas of chemistry and biology. To reflect this expanded scope, the broader terms "microfluidics" and "lab-on-a-chip" are now often used in addition to /spl mu/TAS. Most microfluidics researchers rely on micromachining technologies at least to some extent to produce microflow systems based on interconnected micrometer-dimensioned channels. As members of the microelectromechanical systems (MEMS) community know, however, one can do more with these techniques. It is possible to impart higher levels of functionality by making features in different materials and at different levels within a microfluidic device. Increasingly, researchers have considered how to integrate electrical or electrochemical function into chips for purposes as diverse as heating, temperature sensing, electrochemical detection, and pumping. MEMS processes applied to new materials have also resulted in new approaches for fabrication of microchannels. This review paper explores these and other developments that have emerged from the increasing interaction between the MEMS and microfluidics worlds. 相似文献
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《Communications Magazine, IEEE》1997,35(2):124-130
Network protection and reconfiguration is becoming increasingly important in fiber optic communications systems. This is driven by the intense traffic and high cost of lost high-data-rate optical connections. Optical cross-connects at the nodes in transmission systems are developing rapidly in response. A key optical component required for these applications is an optical space switch. Since the required timescale of network reconfiguration at the optical level is on the order of 50 ms to prevent electrical intervention. The optical space switching speed must be approximately 5 ms or faster. The demand created by these applications has motivated the development of a solid state optical space switch based on a novel planar-waveguide technology. This planar integrated optics technology relies on the thermo-optic effect in specialized optical polymer materials and results in reliable optical space switches without moving parts to wear out. This article reviews the state of the art in solid state optical space switches based on thermo-optic polymers and applications of these switches in network communication systems. The same polymer-based planar waveguide technology used to make the solid state optical space switches of today provides the basis for WDM devices. Electro-optic modulators, and devices integrating several functions (space switching, wavelength multiplexing, light generation and detection) in one component in the years to come 相似文献
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纳米技术的飞速发展促进了微纳结构的加工制造、科学研究及工业应用。而微纳结构的光学特性是近年来光学领域的研究热点之一,其带动了纳米光子学、表面等离激元光学、超表面/超材料光学、拓扑光子学、非厄米光学等新兴学科的发展,为实现光的高精度、全方位操控奠定了重要技术基础。文中主要针对全光图像处理中的边缘检测技术,系统地梳理了微纳光学结构和器件在实现光计算(如微分、卷积等)时涉及的基础、原理、技术和应用,并展望了其在超快图像处理、高对比度显微成像、卷积神经网络和智能光学系统等领域的应用研究。 相似文献
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This paper provides a review, directed at scientists and engineers concerned with microsystems technology, of advances in microelectromechanical systems (MEMS). The emphasis is on silicon technology, where the electrical properties of the material are exploited in circuitry and the mechanical properties are used in sensor and microstructure applications. Developments in surface micromachining are discussed, and applications in sensors, microelectronic devices, vacuum microanalysis systems, microfluidics, and optoelectronic subsystems are reviewed. Some emerging technologies are assessed and promising new research directions are identified 相似文献