Spatially resolved collective excitations of nano-plasmas via molecular dynamics simulations and fluid dynamics
Identifieur interne : 005527 ( Main/Exploration ); précédent : 005526; suivant : 005528Spatially resolved collective excitations of nano-plasmas via molecular dynamics simulations and fluid dynamics
Auteurs : T. Raitza [Autriche, France] ; H. Reinholz [Allemagne, Australie] ; P-G Reinhard [Allemagne] ; G. Rpke [Allemagne] ; I. Broda [Autriche]Source :
- New Journal of Physics [ 1367-2630 ] ; 2012-11.
Descripteurs français
- Wicri :
- topic : Simulation.
English descriptors
- KwdEn :
- Angular momentum, Bulk plasmas, Bulk systems, Cluster radius, Cluster volume, Collective effects, Collective excitations, Collective model, Collective modes, Complete solution, Continuity equation, Correlation functions, Current density, Current density correlation function, Current density correlations, Current density mode, Current density modes, Density autocorrelation function, Density correlation function, Different approaches, Dipole mode, Dipole modes, Direct comparison, Dynamical, Dynamical picture, Dynamical structure factor, Dynamics, Electron density, Electron dynamics, Error function, Excitation, Excitation energy, Excitation operators, Excitation spectrum, Fluid dynamics, Fourier decomposition, Frequency domain, Full quantum, Ground state, Gure, Harmonics, Higher frequencies, Ionic density, Laplace transformation, Local density, Metal clusters, Molecular dynamics simulations, Morozov, Nite, Nite systems, Optical properties, Ordinal numbers, Particle density correlation function, Phys, Plane wave oscillation, Plasmon, Quadrupole mode, Radial dependence, Radial distance, Reinhard, Reinholz, Resonance frequencies, Resonance structures, Response function, Right panel, Simulation, Spatial dependence, Spatial resolution, Spatial structure, Spherical harmonics, Surface plasmon, Thermodynamic equilibrium, Transition density, Uctuation, Uctuation correlations, Uctuation mode, Uctuations, Wave number.
- Teeft :
- Angular momentum, Bulk plasmas, Bulk systems, Cluster radius, Cluster volume, Collective effects, Collective excitations, Collective model, Collective modes, Complete solution, Continuity equation, Correlation functions, Current density, Current density correlation function, Current density correlations, Current density mode, Current density modes, Density autocorrelation function, Density correlation function, Different approaches, Dipole mode, Dipole modes, Direct comparison, Dynamical, Dynamical picture, Dynamical structure factor, Dynamics, Electron density, Electron dynamics, Error function, Excitation, Excitation energy, Excitation operators, Excitation spectrum, Fluid dynamics, Fourier decomposition, Frequency domain, Full quantum, Ground state, Gure, Harmonics, Higher frequencies, Ionic density, Laplace transformation, Local density, Metal clusters, Molecular dynamics simulations, Morozov, Nite, Nite systems, Optical properties, Ordinal numbers, Particle density correlation function, Phys, Plane wave oscillation, Plasmon, Quadrupole mode, Radial dependence, Radial distance, Reinhard, Reinholz, Resonance frequencies, Resonance structures, Response function, Right panel, Simulation, Spatial dependence, Spatial resolution, Spatial structure, Spherical harmonics, Surface plasmon, Thermodynamic equilibrium, Transition density, Uctuation, Uctuation correlations, Uctuation mode, Uctuations, Wave number.
Abstract
Collective excitations in nano-plasmas are described by dynamical bi-local auto-correlation functions. These excitations, which are related to the plasmon excitations in bulk plasmas, arise in the classical as well as the quantum regime. Instead of the wave-vector-dependent dynamical structure factor, which is not well defined in finite systems, two different signatures are considered to characterize collective excitations: the bi-local particle density correlation function and the bi-local current density correlation function. The relation between both signatures is not as trivial as in the homogeneous case and is given here. Exemplary calculations are performed for expanding nearly spherical clusters of sodium atoms after excitation by a high-intensity short pulse laser beam. The lowest collective excitations obtained in the classical regime using molecular dynamics simulations agree well with the lowest collective excitations obtained from quantum calculations using fluid dynamics. The energy, damping and structure of the lowest collective modes are given. The dynamical bi-local correlation functions are of relevance for the optical properties, in particular the determination of photo absorption coefficients of nano-plasmas.
Url:
DOI: 10.1088/1367-2630/14/11/115016
Affiliations:
- Allemagne, Australie, Autriche, France
- Bavière, District de Moyenne-Franconie, Midi-Pyrénées, Occitanie (région administrative)
- Erlangen, Toulouse
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Broda</name><affiliation wicri:level="1"><country xml:lang="fr">Autriche</country><wicri:regionArea>Johannes Kepler Universitt Linz, Altenberger Strasse 69, 4040 Linz</wicri:regionArea><wicri:noRegion>4040 Linz</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">New Journal of Physics</title><idno type="eISSN">1367-2630</idno><imprint><publisher>IOP Publishing</publisher><date type="published" when="2012-11">2012-11</date><biblScope unit="volume">14</biblScope><biblScope unit="issue">11</biblScope></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Angular momentum</term><term>Bulk plasmas</term><term>Bulk systems</term><term>Cluster radius</term><term>Cluster volume</term><term>Collective effects</term><term>Collective excitations</term><term>Collective model</term><term>Collective modes</term><term>Complete solution</term><term>Continuity equation</term><term>Correlation functions</term><term>Current density</term><term>Current density correlation function</term><term>Current density correlations</term><term>Current density mode</term><term>Current density modes</term><term>Density autocorrelation function</term><term>Density correlation function</term><term>Different approaches</term><term>Dipole mode</term><term>Dipole modes</term><term>Direct comparison</term><term>Dynamical</term><term>Dynamical picture</term><term>Dynamical structure factor</term><term>Dynamics</term><term>Electron density</term><term>Electron dynamics</term><term>Error function</term><term>Excitation</term><term>Excitation energy</term><term>Excitation operators</term><term>Excitation spectrum</term><term>Fluid dynamics</term><term>Fourier decomposition</term><term>Frequency domain</term><term>Full quantum</term><term>Ground state</term><term>Gure</term><term>Harmonics</term><term>Higher frequencies</term><term>Ionic density</term><term>Laplace transformation</term><term>Local density</term><term>Metal clusters</term><term>Molecular dynamics simulations</term><term>Morozov</term><term>Nite</term><term>Nite systems</term><term>Optical properties</term><term>Ordinal numbers</term><term>Particle density correlation function</term><term>Phys</term><term>Plane wave oscillation</term><term>Plasmon</term><term>Quadrupole mode</term><term>Radial dependence</term><term>Radial distance</term><term>Reinhard</term><term>Reinholz</term><term>Resonance frequencies</term><term>Resonance structures</term><term>Response function</term><term>Right panel</term><term>Simulation</term><term>Spatial dependence</term><term>Spatial resolution</term><term>Spatial structure</term><term>Spherical harmonics</term><term>Surface plasmon</term><term>Thermodynamic equilibrium</term><term>Transition density</term><term>Uctuation</term><term>Uctuation correlations</term><term>Uctuation mode</term><term>Uctuations</term><term>Wave number</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Angular momentum</term><term>Bulk plasmas</term><term>Bulk systems</term><term>Cluster radius</term><term>Cluster volume</term><term>Collective effects</term><term>Collective excitations</term><term>Collective model</term><term>Collective modes</term><term>Complete solution</term><term>Continuity equation</term><term>Correlation functions</term><term>Current density</term><term>Current density correlation function</term><term>Current density correlations</term><term>Current density mode</term><term>Current density modes</term><term>Density autocorrelation function</term><term>Density correlation function</term><term>Different approaches</term><term>Dipole mode</term><term>Dipole modes</term><term>Direct comparison</term><term>Dynamical</term><term>Dynamical picture</term><term>Dynamical structure factor</term><term>Dynamics</term><term>Electron density</term><term>Electron dynamics</term><term>Error function</term><term>Excitation</term><term>Excitation energy</term><term>Excitation operators</term><term>Excitation spectrum</term><term>Fluid dynamics</term><term>Fourier decomposition</term><term>Frequency domain</term><term>Full quantum</term><term>Ground state</term><term>Gure</term><term>Harmonics</term><term>Higher frequencies</term><term>Ionic density</term><term>Laplace transformation</term><term>Local density</term><term>Metal clusters</term><term>Molecular dynamics simulations</term><term>Morozov</term><term>Nite</term><term>Nite systems</term><term>Optical properties</term><term>Ordinal numbers</term><term>Particle density correlation function</term><term>Phys</term><term>Plane wave oscillation</term><term>Plasmon</term><term>Quadrupole mode</term><term>Radial dependence</term><term>Radial distance</term><term>Reinhard</term><term>Reinholz</term><term>Resonance frequencies</term><term>Resonance structures</term><term>Response function</term><term>Right panel</term><term>Simulation</term><term>Spatial dependence</term><term>Spatial resolution</term><term>Spatial structure</term><term>Spherical harmonics</term><term>Surface plasmon</term><term>Thermodynamic equilibrium</term><term>Transition density</term><term>Uctuation</term><term>Uctuation correlations</term><term>Uctuation mode</term><term>Uctuations</term><term>Wave number</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Simulation</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Collective excitations in nano-plasmas are described by dynamical bi-local auto-correlation functions. These excitations, which are related to the plasmon excitations in bulk plasmas, arise in the classical as well as the quantum regime. Instead of the wave-vector-dependent dynamical structure factor, which is not well defined in finite systems, two different signatures are considered to characterize collective excitations: the bi-local particle density correlation function and the bi-local current density correlation function. The relation between both signatures is not as trivial as in the homogeneous case and is given here. Exemplary calculations are performed for expanding nearly spherical clusters of sodium atoms after excitation by a high-intensity short pulse laser beam. The lowest collective excitations obtained in the classical regime using molecular dynamics simulations agree well with the lowest collective excitations obtained from quantum calculations using fluid dynamics. The energy, damping and structure of the lowest collective modes are given. The dynamical bi-local correlation functions are of relevance for the optical properties, in particular the determination of photo absorption coefficients of nano-plasmas.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Australie</li><li>Autriche</li><li>France</li></country><region><li>Bavière</li><li>District de Moyenne-Franconie</li><li>Midi-Pyrénées</li><li>Occitanie (région administrative)</li></region><settlement><li>Erlangen</li><li>Toulouse</li></settlement></list><tree><country name="Autriche"><noRegion><name sortKey="Raitza, T" sort="Raitza, T" uniqKey="Raitza T" first="T" last="Raitza">T. Raitza</name></noRegion><name sortKey="Broda, I" sort="Broda, I" uniqKey="Broda I" first="I" last="Broda">I. Broda</name></country><country name="France"><region name="Occitanie (région administrative)"><name sortKey="Raitza, T" sort="Raitza, T" uniqKey="Raitza T" first="T" last="Raitza">T. Raitza</name></region><name sortKey="Raitza, T" sort="Raitza, T" uniqKey="Raitza T" first="T" last="Raitza">T. Raitza</name></country><country name="Allemagne"><noRegion><name sortKey="Reinholz, H" sort="Reinholz, H" uniqKey="Reinholz H" first="H" last="Reinholz">H. Reinholz</name></noRegion><name sortKey="Reinhard, P G" sort="Reinhard, P G" uniqKey="Reinhard P" first="P-G" last="Reinhard">P-G Reinhard</name><name sortKey="Reinhard, P G" sort="Reinhard, P G" uniqKey="Reinhard P" first="P-G" last="Reinhard">P-G Reinhard</name><name sortKey="Reinholz, H" sort="Reinholz, H" uniqKey="Reinholz H" first="H" last="Reinholz">H. Reinholz</name><name sortKey="Rpke, G" sort="Rpke, G" uniqKey="Rpke G" first="G" last="Rpke">G. Rpke</name></country><country name="Australie"><noRegion><name sortKey="Reinholz, H" sort="Reinholz, H" uniqKey="Reinholz H" first="H" last="Reinholz">H. Reinholz</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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