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Optical antennas : linear and nonlinear excitation and emission

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ISBN: 9783866447653 Year: Pages: IX, 186 p. DOI: 10.5445/KSP/1000024929 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:01
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The linear and nonlinear resonance behaviour of optical antennas (metallic nanostructures showing resonance behaviour at optical frequencies) made of gold and aluminum using electron-beam lithography is investigated. Specifically, it is of interest how the emission behaviour is changed by the coupling of two antenna arms via a small gap. Experimental techniques applied include dark-field spectroscopy and two-photon luminescence.

Neuroanatomy for the XXIst Century

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889199167 Year: Pages: 199 DOI: 10.3389/978-2-88919-916-7 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Neurology
Added to DOAB on : 2016-01-19 14:05:46
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An explosion of new techniques with vastly improved visualization and sensitivity is leading a veritable revolution in modern neuroanatomy. Basic questions related to cell types, input localization, and connectivity are being re-visited and tackled with significantly more accurate and higher resolution experimental approaches. A major goal of this e-Book is thus to highlight in one place the impressive range of available techniques, even as these are fast becoming routine. This is not meant as a technical review, however, but rather will project the technical explosion as indicative of a field now in a vibrant state of renewal. Thus, contributions will be mainly research articles using the newer techniques. A second goal is to showcase what has become the conspicuous interdisciplinary reach of the field: neuroanatomical standards and the close association of structure-function and underlying circuitry mechanisms are increasingly relevant to investigations in development, physiology, and disease. Another feature of this Research Topic is that it includes a breadth of cross-species contributions from investigators working with rodent, nonhuman primate, and human brains. This is important since most of our current knowledge of brain structure has been obtained from experimental animals. However, recent technical advances, coupled with researcher willingness to use the human tissue available, will undoubtedly lead to major advances in the near future regarding human brain mapping and connectomes. Thus, of particular interest will be the methods that can help to define general wiring principles in the brain, both structural and functional. Overall, the state of the field is: exciting.

Optical MEMS

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ISBN: 9783039213030 / 9783039213047 Year: Pages: 172 DOI: 10.3390/books978-3-03921-304-7 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:15
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Optical microelectromechanical systems (MEMS), microoptoelectromechanical systems (MOEMS), or optical microsystems are devices or systems that interact with light through actuation or sensing at a micro- or millimeter scale. Optical MEMS have had enormous commercial success in projectors, displays, and fiberoptic communications. The best-known example is Texas Instruments’ digital micromirror devices (DMDs). The development of optical MEMS was impeded seriously by the Telecom Bubble in 2000. Fortunately, DMDs grew their market size even in that economy downturn. Meanwhile, in the last one and half decade, the optical MEMS market has been slowly but steadily recovering. During this time, the major technological change was the shift of thin-film polysilicon microstructures to single-crystal–silicon microsructures. Especially in the last few years, cloud data centers are demanding large-port optical cross connects (OXCs) and autonomous driving looks for miniature LiDAR, and virtual reality/augmented reality (VR/AR) demands tiny optical scanners. This is a new wave of opportunities for optical MEMS. Furthermore, several research institutes around the world have been developing MOEMS devices for extreme applications (very fine tailoring of light beam in terms of phase, intensity, or wavelength) and/or extreme environments (vacuum, cryogenic temperatures) for many years. Accordingly, this Special Issue seeks to showcase research papers, short communications, and review articles that focus on (1) novel design, fabrication, control, and modeling of optical MEMS devices based on all kinds of actuation/sensing mechanisms; and (2) new developments of applying optical MEMS devices of any kind in consumer electronics, optical communications, industry, biology, medicine, agriculture, physics, astronomy, space, or defense.

Keywords

scanning micromirror --- electromagnetic actuator --- angle sensor --- flame retardant 4 (FR4) --- variable optical attenuator (VOA) --- wavelength dependent loss (WDL) --- polarization dependent loss (PDL) --- micro-electro-mechanical systems (MEMS) --- tunable fiber laser --- echelle grating --- DMD chip --- MEMS scanning micromirror --- fringe projection --- laser stripe scanning --- quality map --- large reflection variations --- 3D measurement --- laser stripe width --- vibration noise --- MLSSP --- MEMS scanning mirror --- wavefront sensing --- digital micromirror device --- ocular aberrations --- dual-mode liquid-crystal (LC) device --- infrared Fabry–Perot (FP) filtering --- LC micro-lenses controlled electrically --- spectrometer --- infrared --- digital micromirror device (DMD) --- signal-to-noise ratio (SNR) --- stray light --- programmable spectral filter --- digital micromirror device --- optical switch --- microscanner --- input shaping --- open-loop control --- quasistatic actuation --- residual oscillation --- usable scan range --- higher-order modes --- resonant MEMS scanner --- electrostatic --- parametric resonance --- NIR fluorescence --- intraoperative microscope --- 2D Lissajous --- fluorescence confocal --- metasurface --- metalens --- field of view (FOV) --- achromatic --- Huygens’ metalens --- bio-optical imaging --- optical coherence tomography --- confocal --- two-photon --- spectrometer --- MEMS mirror --- electrothermal bimorph --- Cu/W bimorph --- electrothermal actuation --- reliability --- n/a

MEMS Technology for Biomedical Imaging Applications

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ISBN: 9783039216048 / 9783039216055 Year: Pages: 218 DOI: 10.3390/books978-3-03921-605-5 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:16
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Biomedical imaging is the key technique and process to create informative images of the human body or other organic structures for clinical purposes or medical science. Micro-electro-mechanical systems (MEMS) technology has demonstrated enormous potential in biomedical imaging applications due to its outstanding advantages of, for instance, miniaturization, high speed, higher resolution, and convenience of batch fabrication. There are many advancements and breakthroughs developing in the academic community, and there are a few challenges raised accordingly upon the designs, structures, fabrication, integration, and applications of MEMS for all kinds of biomedical imaging. This Special Issue aims to collate and showcase research papers, short commutations, perspectives, and insightful review articles from esteemed colleagues that demonstrate: (1) original works on the topic of MEMS components or devices based on various kinds of mechanisms for biomedical imaging; and (2) new developments and potentials of applying MEMS technology of any kind in biomedical imaging. The objective of this special session is to provide insightful information regarding the technological advancements for the researchers in the community.

Keywords

tilted microcoil --- electromagnetically-driven --- surface micromachining --- polyimide capillary --- MEMS --- ego-motion estimation --- indoor navigation --- monocular camera --- scale ambiguity --- wearable sensors --- photoacoustic --- microelectromechanical systems (MEMS) --- miniaturized microscope --- lead-free piezoelectric materials --- high frequency ultrasonic transducer --- needle-type --- high spatial resolution --- ultrahigh frequency ultrasonic transducer --- Si lens --- tight focus --- finite element simulation --- low noise amplifier (LNA) --- noise figure --- smart hydrogels --- bio-sensors --- chemo-sensor --- electrochemical sensors --- transduction techniques --- near-field microwave --- microwave resonator --- microwave remote sensing --- potentiometric sensor --- gold nanoparticles --- metal oxide field-effect transistor --- chemo-FET --- bio-FET --- photoacoustic imaging --- microelectromechanical systems (MEMS) --- MEMS scanning mirror --- micromachined US transducer --- microring resonator --- acoustic delay line --- MEMS mirror --- Lissajous scanning --- pseudo-resonant --- sensing --- imaging --- display --- MEMS actuators --- microendoscopy --- confocal --- two-photon --- wide-filed imaging --- photoacoustic --- fluorescence --- scanner --- capacitive micromachined ultrasonic transducer (CMUT) --- acoustics --- micromachining --- capacitive --- transducer --- modelling --- fabrication --- 3D Printing --- piezoelectric array --- ultrasonic transducer --- ultrasonic imaging --- micro-optics --- bioimaging --- microtechnology --- microelectromechanical systems (MEMS) --- in vitro --- in vivo --- cantilever waveguide --- electrostatic actuator --- non-resonating scanner --- optical scanner --- push-pull actuator --- rib waveguide --- n/a

Microscale Surface Tension and Its Applications

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ISBN: 9783039215645 / 9783039215652 Year: Pages: 240 DOI: 10.3390/books978-3-03921-565-2 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 16:10:12
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Building on advances in miniaturization and soft matter, surface tension effects are a major key to the development of soft/fluidic microrobotics. Benefiting from scaling laws, surface tension and capillary effects can enable sensing, actuation, adhesion, confinement, compliance, and other structural and functional properties necessary in micro- and nanosystems. Various applications are under development: microfluidic and lab-on-chip devices, soft gripping and manipulation of particles, colloidal and interfacial assemblies, fluidic/droplet mechatronics. The capillary action is ubiquitous in drops, bubbles and menisci, opening a broad spectrum of technological solutions and scientific investigations. Identified grand challenges to the establishment of fluidic microrobotics include mastering the dynamics of capillary effects, controlling the hysteresis arising from wetting and evaporation, improving the dispensing and handling of tiny droplets, and developing a mechatronic approach for the control and programming of surface tension effects. In this Special Issue of Micromachines, we invite contributions covering all aspects of microscale engineering relying on surface tension. Particularly, we welcome contributions on fundamentals or applications related to:Drop-botics: fluidic or surface tension-based micro/nanorobotics: capillary manipulation, gripping, and actuation, sensing, folding, propulsion and bio-inspired solutions; Control of surface tension effects: surface tension gradients, active surfactants, thermocapillarity, electrowetting, elastocapillarity; Handling of droplets, bubbles and liquid bridges: dispensing, confinement, displacement, stretching, rupture, evaporation; Capillary forces: modelling, measurement, simulation; Interfacial engineering: smart liquids, surface treatments; Interfacial fluidic and capillary assembly of colloids and devices; Biological applications of surface tension, including lab-on-chip and organ-on-chip systems. We expect novel as well as review contributions on all aspects of surface tension-based micro/nanoengineering. In line with Micromachines' policy, we also invite research proposals that introduce ideas for new applications, devices, or technologies.

Keywords

mist capillary self-alignment --- laser die transfer --- hydrophilic/superhydrophobic patterned surfaces --- microasssembly --- droplet transport --- microfluidics --- vibrations --- contact line oscillation --- asymmetric surfaces --- anisotropic ratchet conveyor --- surface tension --- capillary --- bearing --- wetting --- computational fluid dynamics --- droplet manipulation --- lab-on-a-chip --- microfluidics --- non-invasive control --- photochemical reaction --- photoresponsible surfactant --- surface tension --- two-phase flow --- wettability --- electrowetting --- actuation --- capillary pressure --- lab-on-a-chip --- Nasturtium leaf --- smart superhydrophobic surface --- hot drop --- condensation --- microtexture melting --- self-lubricating slippery surface --- wettability gradient --- electrosurgical scalpels --- anti-sticking --- soft tissue --- continuous-flow reactor --- mixing --- solutal Marangoni effect --- relaxation oscillations --- super-hydrophobic --- durable --- adhesion --- corrosive resistance --- droplet --- vibrations --- transport --- microfluidics --- self-cleaning surface --- superhydrophobic --- superhydrophilic --- superomniphobic --- microfluidics --- electrodynamic screen --- gecko setae --- micropipette-technique --- air-water surface --- oil-water interface --- soluble surfactant --- insoluble lipids --- “black lipid films” --- “droplet-interface-bilayers” --- equilibrium --- dynamic --- adsorption --- gas-microbubbles --- oil-microdroplets --- lung-surfactants --- nanoprecipitation --- microfluidics --- capillary gripper --- pick and place --- micromanufacturing --- two-photon polymerization --- stereolithography --- polydimethylsiloxane (PDMS) replication --- rigid gas permeable contact lenses --- wettability --- hydrophilic --- hydrophobic --- 355 nm UV laser --- surface treatment --- microstructure --- contact angle --- droplets --- liquid bridge --- microfabrication --- micromanipulation --- pick-and-place --- soft robotics --- surface tension --- wetting

Nanoelectronic Materials, Devices and Modeling

Authors: ---
ISBN: 9783039212255 / 9783039212262 Year: Pages: 242 DOI: 10.3390/books978-3-03921-226-2 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-08-28 11:21:27
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As CMOS scaling is approaching the fundamental physical limits, a wide range of new nanoelectronic materials and devices have been proposed and explored to extend and/or replace the current electronic devices and circuits so as to maintain progress with respect to speed and integration density. The major limitations, including low carrier mobility, degraded subthreshold slope, and heat dissipation, have become more challenging to address as the size of silicon-based metal oxide semiconductor field effect transistors (MOSFETs) has decreased to nanometers, while device integration density has increased. This book aims to present technical approaches that address the need for new nanoelectronic materials and devices. The focus is on new concepts and knowledge in nanoscience and nanotechnology for applications in logic, memory, sensors, photonics, and renewable energy. This research on nanoelectronic materials and devices will be instructive in finding solutions to address the challenges of current electronics in switching speed, power consumption, and heat dissipation and will be of great interest to academic society and the industry.

Keywords

UAV --- vision localization --- hierarchical --- landing --- information integration --- memristor --- synaptic device --- spike-timing-dependent plasticity --- neuromorphic computation --- memristive device --- ZnO films --- conditioned reflex --- quantum dot --- sample grating --- cross-gain modulation --- bistability --- distributed Bragg --- semiconductor optical amplifier --- topological insulator --- field-effect transistor --- nanostructure synthesis --- optoelectronic devices --- topological magnetoelectric effect --- drain-induced barrier lowering (DIBL) --- gate-induced drain leakage (GIDL) --- silicon on insulator (SOI) --- graphene --- supercapacitor --- energy storage --- ionic liquid --- UV irradiation --- luminescent centres --- bismuth ions --- two-photon process --- oscillatory neural networks --- pattern recognition --- higher order synchronization --- thermal coupling --- vanadium dioxide --- band-to-band tunneling --- L-shaped tunnel field-effect-transistor --- double-gate tunnel field-effect-transistor --- corner-effect --- AlGaN/GaN --- high-electron mobility transistor (HEMTs) --- p-GaN --- enhancement-mode --- 2DEG density --- InAlN/GaN heterostructure --- polarization effect --- quantum mechanical --- gallium nitride --- MISHEMT --- dielectric layer --- interface traps --- current collapse --- PECVD --- gate-induced drain leakage (GIDL) --- drain-induced barrier lowering (DIBL) --- recessed channel array transistor (RCAT) --- on-current (Ion) --- off-current (Ioff) --- subthreshold slope (SS) --- threshold voltage (VTH) --- saddle FinFET (S-FinFET) --- potential drop width (PDW) --- shallow trench isolation (STI) --- source/drain (S/D) --- conductivity --- 2D material --- Green’s function --- reflection transmision method --- variational form --- dual-switching transistor --- third harmonic tuning --- low voltage --- high efficiency --- CMOS power amplifier IC --- insulator–metal transition (IMT) --- charge injection --- Mott transition --- conductive atomic force microscopy (cAFM) --- gate field effect --- atomic layer deposition (ALD) --- zinc oxide --- silicon --- ZnO/Si --- electron affinity --- bandgap tuning --- conduction band offset --- heterojunction --- solar cells --- PC1D --- vertical field-effect transistor (VFET) --- back current blocking layer (BCBL) --- gallium nitride (GaN) --- normally off power devices --- n/a

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