The Impact of Dielectric Confinement on Electron Dynamics and Optical Nonlinearities in Metal Nanocrystals in Glasses

1997 ◽  
pp. 70-87 ◽  
Author(s):  
Fabrice Vallée ◽  
Natalia Del Fatti ◽  
Christos Flytzanis
Keyword(s):  
Optical Nonlinearities ◽  
Electron Dynamics ◽  
Metal Nanocrystals ◽  
The Impact

scholarly journals Ultrafast electron dynamics following outer-valence ionization: The impact of low-lying relaxation satellite states

2009 ◽  
Vol 130 (15) ◽  
pp. 154305 ◽  
Author(s):  
Siegfried Lünnemann ◽  
Alexander I. Kuleff ◽  
Lorenz S. Cederbaum
Keyword(s):  
Electron Dynamics ◽  
The Impact ◽  
Outer Valence ◽  
Ultrafast Electron Dynamics

Ultrafast electron dynamics and enhanced optical nonlinearities of CdS-capped Au∕BaTiO3 composite film

2005 ◽  
Vol 98 (3) ◽  
pp. 033528 ◽  
Author(s):  
Yong Yang ◽  
Masayuki Nogami ◽  
Jianlin Shi ◽  
Hangrong Chen ◽  
Ye Liu ◽  
...  
Keyword(s):  
Composite Film ◽  
Optical Nonlinearities ◽  
Electron Dynamics ◽  
Ultrafast Electron Dynamics

Ultrafast Electron Dynamics and Optical Nonlinearities in Metal Nanoparticles

2001 ◽  
Vol 105 (12) ◽  
pp. 2264-2280 ◽  
Author(s):  
Christophe Voisin ◽  
Natalia Del Fatti ◽  
Dimitris Christofilos ◽  
Fabrice Vallée
Keyword(s):  
Metal Nanoparticles ◽  
Optical Nonlinearities ◽  
Electron Dynamics ◽  
Ultrafast Electron Dynamics

scholarly journals Hot electron dynamics and optical nonlinearities in non-uniformly excited indium phosphide

2005 ◽  
Vol 45 (6) ◽  
pp. 481-486
Author(s):  
Liudvikas Subačius ◽  
Irmantas Kašalynas ◽  
Mindaugas Vingelis ◽  
Kęstutis Jarašiūnas
Keyword(s):  
Indium Phosphide ◽  
Optical Nonlinearities ◽  
Hot Electron ◽  
Electron Dynamics

scholarly journals Mode Splitting Induced by Mesoscopic Electron Dynamics in Strongly Coupled Metal Nanoparticles on Dielectric Substrates

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1206 ◽  
Author(s):  
Katarzyna Kluczyk-Korch ◽  
Lucjan Jacak ◽  
Witold Aleksander Jacak ◽  
Christin David
Keyword(s):  
Stark Effect ◽  
Golden Rule ◽  
Metal Nanoparticle ◽  
Photon Absorption ◽  
Hydrodynamic Theory ◽  
Optical Coupling ◽  
Electron Dynamics ◽  
Dielectric Substrates ◽  
Substrate Coupling ◽  
The Impact

We study strong optical coupling of metal nanoparticle arrays with dielectric substrates. Based on the Fermi Golden Rule, the particle–substrate coupling is derived in terms of the photon absorption probability assuming a local dipole field. An increase in photocurrent gain is achieved through the optical coupling. In addition, we describe light-induced, mesoscopic electron dynamics via the nonlocal hydrodynamic theory of charges. At small nanoparticle size (<20 nm), the impact of this type of spatial dispersion becomes sizable. Both absorption and scattering cross sections of the nanoparticle are significantly increased through the contribution of additional nonlocal modes. We observe a splitting of local optical modes spanning several tenths of nanometers. This is a signature of semi-classical, strong optical coupling via the dynamic Stark effect, known as Autler–Townes splitting. The photocurrent generated in this description is increased by up to 2%, which agrees better with recent experiments than compared to identical classical setups with up to 6%. Both, the expressions derived for the particle–substrate coupling and the additional hydrodynamic equation for electrons are integrated into COMSOL for our simulations.

scholarly journals Mode Splitting Induced by Mesoscopic Electron Dynamics in Strongly Coupled Metal Nanoparticles on Dielectric Substrates

2019 ◽  
Author(s):  
Katarzyna Kluczyk-Korch ◽  
Lucjan Jacak ◽  
Witold Jacak ◽  
Christin David
Keyword(s):  
Stark Effect ◽  
Golden Rule ◽  
Metal Nanoparticle ◽  
Photon Absorption ◽  
Hydrodynamic Theory ◽  
Optical Coupling ◽  
Electron Dynamics ◽  
Dielectric Substrates ◽  
Substrate Coupling ◽  
The Impact

We study strong optical coupling of metal nanoparticle arrays with dielectric substrates. Based on the Fermi Golden Rule, the particle-substrate coupling is derived in terms of the photon absorption probability assuming a local dipole field. An increase in photocurrent gain is achieved through the optical coupling. In addition, we describe light-induced, mesoscopic electron dynamics via the nonlocal hydrodynamic theory of charges. At small nanoparticle size (&lt;20nm), the impact of this type of spatial dispersion becomes sizable. Both absorption and scattering cross section of the nanoparticle are significantly increased through the contribution of additional nonlocal modes. We observe a splitting of local optical modes spanning several tenths of nanometers. This is a signature of semi-classical, strong optical coupling via the dynamic Stark effect, known as Autler-Townes splitting. The photocurrent generated in this description is increased by up to 2%, which agrees better with recent experiments than compared to identical classical setups with up to 6%. Both, the expressions derived for the particle-substrate coupling and the additional hydrodynamic equation for electrons are integrated into COMSOL for our simulations.

Formation of Lunar Craters and Bright Rays as a Result of Meteorite Impacts

1962 ◽  
Vol 14 ◽  
pp. 415-418
Author(s):  
K. P. Stanyukovich ◽  
V. A. Bronshten
Keyword(s):  
Explosive Charge ◽  
The Moon ◽  
Meteorite Impacts ◽  
The Earth ◽  
Lunar Craters ◽  
The Impact

The phenomena accompanying the impact of large meteorites on the surface of the Moon or of the Earth can be examined on the basis of the theory of explosive phenomena if we assume that, instead of an exploding meteorite moving inside the rock, we have an explosive charge (equivalent in energy), situated at a certain distance under the surface.

The Geosciences Applied to Lunar Exploration

1962 ◽  
Vol 14 ◽  
pp. 169-257 ◽  
Author(s):  
J. Green
Keyword(s):  
Lunar Surface ◽  
Probable Mechanism ◽  
Point Of View ◽  
Lunar Exploration ◽  
Geological Model ◽  
Apply Geophysics ◽  
Surface Features ◽  
The Impact

The term geo-sciences has been used here to include the disciplines geology, geophysics and geochemistry. However, in order to apply geophysics and geochemistry effectively one must begin with a geological model. Therefore, the science of geology should be used as the basis for lunar exploration. From an astronomical point of view, a lunar terrain heavily impacted with meteors appears the more reasonable; although from a geological standpoint, volcanism seems the more probable mechanism. A surface liberally marked with volcanic features has been advocated by such geologists as Bülow, Dana, Suess, von Wolff, Shaler, Spurr, and Kuno. In this paper, both the impact and volcanic hypotheses are considered in the application of the geo-sciences to manned lunar exploration. However, more emphasis is placed on the volcanic, or more correctly the defluidization, hypothesis to account for lunar surface features.

Asteroid and Comet Impact Speeds upon Mars: Significance for Panspermia and the Supply of Organics

1997 ◽  
Vol 161 ◽  
pp. 197-201 ◽  
Author(s):  
Duncan Steel
Keyword(s):  
Probability Distributions ◽  
Regions Of Interest ◽  
Significant Fraction ◽  
Organic Chemicals ◽  
Impact Speed ◽  
The Mean ◽  
The Impact

AbstractWhilst lithopanspermia depends upon massive impacts occurring at a speed above some limit, the intact delivery of organic chemicals or other volatiles to a planet requires the impact speed to be below some other limit such that a significant fraction of that material escapes destruction. Thus the two opposite ends of the impact speed distributions are the regions of interest in the bioastronomical context, whereas much modelling work on impacts delivers, or makes use of, only the mean speed. Here the probability distributions of impact speeds upon Mars are calculated for (i) the orbital distribution of known asteroids; and (ii) the expected distribution of near-parabolic cometary orbits. It is found that cometary impacts are far more likely to eject rocks from Mars (over 99 percent of the cometary impacts are at speeds above 20 km/sec, but at most 5 percent of the asteroidal impacts); paradoxically, the objects impacting at speeds low enough to make organic/volatile survival possible (the asteroids) are those which are depleted in such species.

Sign in / Sign up

Export Citation Format

Share Document