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Showing 1 to 20 of 38 for “"Hot electrons"”.
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Terahertz oscillations of hot electrons in graphene
… is superimposed onto the appropriate dc field, hot carriers in graphene undergo an anomalous parametric resonance. Such resonance occurs at about half the frequency ωF = 2πeF/~ωOP , where 2π/ωF is the time taken for carriers to accelerate ballistically to the optic phonon energy ~ωOP in a dc …
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Temporal dynamics of hot-electrons in metal films and alloys
… it can either decay radiatively by emitting a photon or non-radiatively by transferring its energy to charge carriers with excessive kinetic energy, also known as the “hot-carriers.” The photogenerated hot-carriers are promising for applications ranging from optoelectronic devices to renewable …
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On The Origin of Super-Hot Electrons in Intense Laser-Plasma Interactions
… to measure the generation of relativistic electrons and positrons was performed at the Texas Petawatt laser which resulted in the observation of the highest known positron energies ever recorded. The positrons are created by the Bethe-Heitler process where an electron scatters and emits …
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Full-band Monte Carlo simulation of hot electrons in scaled silicon devices
… used to study the effects of device scaling on hot electrons in different types of n-channel MOSFETs and flash memory structures. A MOSFET with a single source/drain implant, an LDD MOSFET, an SOI MOSFET, and a MOSFET built on top of a heavily doped ""ground plane"" have been simulated. …
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Exact Analysis of Hot Electrons Produced by Resonant Absorption in Laswer-Plasma Interaction
Made available in DSpace on 2017-07-06T18:59:16Z (GMT). No. of bitstreams: 3 Venkatesan_Ravi_C_MS.pdf: 34983848 bytes, checksum: 3cf09a3c8324e50afef3b7ec2aa01bfc (MD5) Venkatesan_Ravi_C_MS_ABS.pdf: 560564 bytes, checksum: 6908688b5adcd75d91b0989e00ce6fa2 (MD5) license.txt: 4813 bytes, checksum: …
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Effects of hot electrons on the stability of a closed field line plasma
… employed on dipole experiments, the effects of a hot species on stability in closed magnetic field line geometry are investigated. The interchange stability of a plasma consisting of a fluid background with a population of kinetic hot electrons is considered. The species diamagnetic drift and …
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Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals
Photoelectric hot carrier generation in metal-semiconductor junctions allows for optical-to- electrical energy conversion at photon energies below the bandgap of the semiconductor. Which opens new opportunities in optical sensors and energy conversion devices. In this thesis research, the …
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Particle simulation of laser-produced plasmas on the basis of analytic magnetohydrodynamic solutions
… using laser beams have reported the emission of hot electrons in large quantities. This phenomenon has been one of the major hindrances to the efficient compression of a thermonuclear target. This, however, leads to the speculation of a number of non-fusion applications and an alternative fusion …
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Modeling the effects of surface plasmon resonance on hot electron collection in a metallic-semiconductor photonic crystal device
Metallic-semiconductor Schottky hot carrier devices have been found as a promising solution to harvest photon with energy below the bandgap of semiconductor, which is of crucial importance for realizing efficient solar energy conversion. In recent years, extensive efforts have been devoted to …
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Fast-ion spectrometry of ICF implosions and laser-foil experiments at the omega and MTW laser facilities
… wavelength and intensity of the driver, generate hot electrons with temperatures ranging from tens to thousands of kilo-electron-volts. These electrons, which accelerate the ions measured in this work, can be either detrimental or essential to implosion performance depending on the ICF scheme …
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Effects of Laser Frequency and Multiple Beams on Hot Electron Generation in Fast Ignition
… ∼10 kJ of energy in ∼10 ps into a small hot-spot at the periphery of the compressed core, igniting a fusion burn wave. FI promises a much higher energy gain over the conventional central hot-spot ignition scheme in which ignition is achieved through compression alone. Sufficient energy …
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Nonlinear transport in semiconductor superlattices
… condition corresponding to resonant photon absorption in the Wannier-Stark ladder resulting from the spontaneous bias. The current-voltage characteristic without time-dependent driving exhibits multistability for sufficiently large magnetic or self-consistent electric fields, and …
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Vibrationally enhanced associative photodesorption of H2 (D2) from Ru(0001) : quantum and classical approaches
… using catalytic converters. More recently, also photoinduced reactions at surfaces, useful, \textit{e.g.}, for photocatalysis, were studied in detail. Often, very short laser pulses are used for this purpose. Some of these reactions are occurring on femtosecond (1 fs=$10^{-15}$ s) time scales …
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Physical and Electrical Properties of Hot -Carrier Degradation of Silicon *Mos Transistors Processed in Deuterium and Hydrogen
… annealing of MOS transistors to achieve hot-carrier lifetime improvement. Deuterium processing as a function of the process parameters such as temperature, time, and pressure for MOS transistors with one level and multilevels of metalization has been studied. Lifetime improvements of …
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Exploring Strategies to Break Adsorption-Energy Scaling Relations in Catalytic CO Oxidation
… catalytic science. It has been shown that hot electrons can selectively activate the chemical bonds that are not responsive to phonon excitation, thus providing a rational approach beyond scaling limitation. Another emerging yet effective way to break the scaling constraint is single atom …
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Plasmonic hot carrier-driven electrochemistry
… energy has sparked widespread interest in photocatalysts, including systems based on plasmonic metal nanoparticles. To take advantage of these materials, a fundamental understanding of how plasmon-induced hot-carriers drive chemical reactions is needed. This work examines how different hot …
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Characterisation and Measurement of Laser Produced Plasma Emission and Applications in Opacity Experiments
… to analyse bremsstrahlung emission from hot electrons produced in the laser plasma interaction. Combining a compensating filter technique with an x-ray diode array allows for the hot electron temperature to be deduced with good accuracy (±0.5keV). A layered target comprising 0.8um Al and …
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Non-Thermal Contribution to Ruthenium Photothermal Catalyst in Carbon Dioxide Methanation
… and the release of CO2 into the atmosphere. Photothermal catalysis offers a promising strategy for sustainable chemical transformations by combining thermal and photonic energy to accelerate reactions under mild conditions to convert greenhouses into energy sources. However, quantifying …
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Infrared Energy Conversion in Plasmonic Fields at Two-Dimensional Semiconductors
… metal dichalcogenides (TMD) through plasmonic hot electron transport and nonlinear frequency mixing has important implications in next-generation optoelectronics. Drude-Lorentz theory and approximate discrete dipole (DDA) solutions to Maxwell’s equations guided metal nanoantenna design towards …
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Effects of Radiation Damping in Extreme Ultra-intense Laser-Plasma Interaction
… will exceed 1022 W/cm2, at which intensity electrons accelerated by the laser get energy more than 100 MeV and start to emit radiation strongly. Resultingly, the damping of electron motion can become large. In order to study this problem we developed a code to solve a set of equations …
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