Three dimensional clyindrical Kadomtsev Petviashvili equation in two temperature charged dusty plasma

2016 ◽  
Vol 361 (9) ◽  
Author(s):  
N. A. El-Bedwehy ◽  
M. A. El-Attafi ◽  
S. K. El-Labany
Keyword(s):  
Dusty Plasma ◽  
Three Dimensional ◽  
Petviashvili Equation ◽  
Two Temperature

The Kadomstev–Petviashvili equation in dusty plasma with variable dust charge and two temperature ions

2006 ◽  
Vol 28 (4) ◽  
pp. 1106-1111 ◽  
Author(s):  
Tarsem Singh Gill ◽  
Nareshpal Singh Saini ◽  
Harvinder Kaur
Keyword(s):  
Dusty Plasma ◽  
Dust Charge ◽  
Petviashvili Equation ◽  
Two Temperature

scholarly journals Tracking ultrafast hot-electron diffusion in space and time by ultrafast thermomodulation microscopy

2019 ◽  
Vol 5 (5) ◽  
pp. eaav8965 ◽  
Author(s):  
A. Block ◽  
M. Liebel ◽  
R. Yu ◽  
M. Spector ◽  
Y. Sivan ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Nonequilibrium Dynamics ◽  
Hot Electron ◽  
Temperature Model ◽  
Three Dimensional Model ◽  
Electron Diffusion ◽  
Diffusion Dynamics ◽  
Electron Phonon Coupling ◽  
20 Nm ◽  
Two Temperature

The ultrafast response of metals to light is governed by intriguing nonequilibrium dynamics involving the interplay of excited electrons and phonons. The coupling between them leads to nonlinear diffusion behavior on ultrashort time scales. Here, we use scanning ultrafast thermomodulation microscopy to image the spatiotemporal hot-electron diffusion in thin gold films. By tracking local transient reflectivity with 20-nm spatial precision and 0.25-ps temporal resolution, we reveal two distinct diffusion regimes: an initial rapid diffusion during the first few picoseconds, followed by about 100-fold slower diffusion at longer times. We find a slower initial diffusion than previously predicted for purely electronic diffusion. We develop a comprehensive three-dimensional model based on a two-temperature model and evaluation of the thermo-optical response, taking into account the delaying effect of electron-phonon coupling. Our simulations describe well the observed diffusion dynamics and let us identify the two diffusion regimes as hot-electron and phonon-limited thermal diffusion, respectively.

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