Three-dimensional Child–Langmuir law for uniform hot electron emission

2005 ◽  
Vol 12 (5) ◽  
pp. 053107 ◽  
Author(s):  
W. S. Koh ◽  
L. K. Ang ◽  
T. J. T. Kwan
Keyword(s):  
Electron Emission ◽  
Three Dimensional ◽  
Hot Electron

scholarly journals Hot electron emission from waveguide integrated lanthanum hexaboride nanoparticles

2021 ◽  
Vol 118 (7) ◽  
pp. 071108
Author(s):  
Fatemeh Rezaeifar ◽  
Hyun Uk Chae ◽  
Ragib Ahsan ◽  
Rehan Kapadia
Keyword(s):  
Electron Emission ◽  
Lanthanum Hexaboride ◽  
Hot Electron

Disk-hole array structure for hot-electron emission enhancement

2021 ◽  
Author(s):  
Hirofumi Morisawa ◽  
Atsushi Ono ◽  
Wataru Inami ◽  
Yoshimasa Kawata
Keyword(s):  
Electron Emission ◽  
Hole Array ◽  
Hot Electron ◽  
Emission Enhancement ◽  
Array Structure

Performance Limits of Graphene Hot Electron Emission Photoemitters

2020 ◽  
Vol 13 (2) ◽  
Author(s):  
Ragib Ahsan ◽  
Mashnoon Alam Sakib ◽  
Hyun Uk Chae ◽  
Rehan Kapadia
Keyword(s):  
Electron Emission ◽  
Hot Electron ◽  
Performance Limits

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.

Comprehensive diagnostics of hot electron emission from plasmas produced by sub-nanosecond terawatt laser on thin foil metal targets

2019 ◽  
Vol 14 (12) ◽  
pp. C12003-C12003 ◽  
Author(s):  
M. Krupka ◽  
J. Krasa ◽  
R. Dudzak ◽  
J. Cikhardt ◽  
M. Kalal ◽  
...  
Keyword(s):  
Electron Emission ◽  
Thin Foil ◽  
Hot Electron ◽  
Terawatt Laser

HOT-ELECTRON EMISSION FROM COMPOSITE METAL-INSULATOR MICROEMITTERS

1986 ◽  
Vol 47 (C7) ◽  
pp. C7-139-C7-144 ◽  
Author(s):  
M. S. MOUSA ◽  
R. V. LATHAM
Keyword(s):  
Electron Emission ◽  
Hot Electron ◽  
Metal Insulator
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