Size-Dependent Plasmon Lifetimes and Electron-Phonon Coupling Time Constants for Surface Bound Na Clusters

1998 ◽  
Vol 80 (1) ◽  
pp. 45-48 ◽  
Author(s):  
J.-H. Klein-Wiele ◽  
P. Simon ◽  
H.-G. Rubahn
Keyword(s):  
Phonon Coupling ◽  
Time Constants ◽  
Size Dependent ◽  
Electron Phonon Coupling ◽  
Coupling Time

Size-Dependent Electron–Phonon Coupling in Monocrystalline Gold Nanoparticles

ACS Photonics ◽  
2021 ◽  
Author(s):  
Yannic U. Staechelin ◽  
Dominik Hoeing ◽  
Florian Schulz ◽  
Holger Lange
Keyword(s):  
Gold Nanoparticles ◽  
Phonon Coupling ◽  
Size Dependent ◽  
Electron Phonon Coupling

Influence of Electron-Phonon Coupling Coefficient on Properties in Femtosecond Laser Ablation

2015 ◽  
Vol 814 ◽  
pp. 144-149 ◽  
Author(s):  
Ran Xiang ◽  
Xin Yu Tan ◽  
Hui Li Wei
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Electron Temperature ◽  
Coupling Coefficient ◽  
Femtosecond Laser Ablation ◽  
High Energy ◽  
Rapid Decline ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Coupling Time

Thermodynamics effects generated by femtosecond laser ablation are very important. In this work, the numerical simulation of high-energy femtosecond laser ablation especially the electro-phonon coupling coefficient influence of high-energy femtosecond laser ablation on metal target was studied. A new two-temperature model (TTM) which considered the effects of electron density of states (DOS) on electron-phonon coupling coefficient was first established, then the temperature evolvement for electron and lattice in different electro-phonon coupling coefficient G, and the effect of G on electron temperature and lattice temperature and electron-phonon coupling time were emphatically analyzed. The results showed that the electron-phonon coupling coefficient strongly affected the surface electron temperature and coupling time in the femtosecond laser ablation. The smaller the electron-phonon coupling coefficient was, the more the energy transmission from electronic to ion subsystem. As a result, the smaller the value of electron-phonon coupling coefficient, a more rapid decline for the temperature of electronic sub-system achieved. This work will offer help for the future investigation of material fabrication by femtosecond laser ablation.

OPTICAL ABSORPTION IN QUANTUM DOTS

2002 ◽  
Vol 16 (10) ◽  
pp. 1489-1497 ◽  
Author(s):  
PHANI MURALI KRISHNA ◽  
SOMA MUKHOPADHYAY ◽  
ASHOK CHATTERJEE
Keyword(s):  
Quantum Dots ◽  
Optical Absorption ◽  
Optical Absorption Coefficient ◽  
Coupling Constant ◽  
Phonon Coupling ◽  
Size Dependent ◽  
Small Quantum ◽  
Electron Phonon Coupling ◽  
The One ◽  
Strong Confinement

The optical absorption behaviour of polar semiconductor quantum dots has been investigated in the strong confinement regime using the adiabatic approximation of Landau and Pekar. It has been shown that optical absorption coefficient becomes strongly size dependent below a certain value of the confinement length and also exhibits interesting crossing behaviour when studied as a function of the electron–phonon coupling constant for different values of the confinement length. It has furthermore been shown that the ratio of the one-phonon part of the oscillator strength to the zero-phonon contribution can be significantly large in a small quantum dot and can also exhibit an interesting minimum structure at certain value of the confinement length for intermediate electron–phonon coupling.

Size-Dependent Thermochromism through Enhanced Electron-Phonon Coupling in 1 nm Quantum Dots

2014 ◽  
Vol 53 (40) ◽  
pp. 10706-10709 ◽  
Author(s):  
Haruna Tamaki ◽  
Hiroto Watanabe ◽  
Sachiko Kamiyama ◽  
Yuya Oaki ◽  
Hiroaki Imai
Keyword(s):  
Quantum Dots ◽  
Phonon Coupling ◽  
Size Dependent ◽  
Electron Phonon Coupling

Raman Investigation on Size Dependent Electron-Phonon Coupling in LiCoFeO[sub 4] Nanoparticles

2010 ◽  
Author(s):  
Manish K. Srivastava ◽  
N. Vyas ◽  
Animesh K. Ojha ◽  
P. M. Champion ◽  
L. D. Ziegler
Keyword(s):  
Phonon Coupling ◽  
Size Dependent ◽  
Electron Phonon Coupling

Size Dependent Structural, Vibrational, and Luminescence Properties of Nanocrystalline LiIn(WO4)2:Cr3+

2008 ◽  
Vol 8 (7) ◽  
pp. 3545-3554 ◽  
Author(s):  
K. Hermanowicz ◽  
M. Maczka ◽  
P. E. Tomaszewski ◽  
L. Krajczyk ◽  
J. Hanuza ◽  
...  
Keyword(s):  
Particle Size ◽  
Structural Changes ◽  
Pechini Method ◽  
Phonon Coupling ◽  
Covalent Character ◽  
X Ray ◽  
Electron Transmission ◽  
Size Dependent ◽  
Electron Phonon Coupling ◽  
Critical Particle Size

X-ray, electron transmission spectroscopy, vibrational and luminescence studies of LiIn(WO4)2:Cr3+ nanoparticles prepared by Pechini method are reported. On annealing the sample several structural changes were observed resulting in a creation of three new, previously unknown polymorphs. It was shown that this tungstate undergoes two size-induced phase transitions from the structure similar to LiFe(WO4)2 into the structure similar to LiYb(WO4)2 and then into the structure of LiGa(WO4)2 type. These transitions occur for the critical particle size of about 100 and 30 nm, and they could be attributed mainly to some changes in the distribution of the sites occupied by Li+ and In3+ ions. Luminescence studies revealed decrease of the covalent character of chromium environment and electron–phonon coupling strength with decreasing size of the nanoparticles.

Size-Dependent Thermochromism through Enhanced Electron-Phonon Coupling in 1 nm Quantum Dots

2014 ◽  
Vol 126 (40) ◽  
pp. 10882-10885
Author(s):  
Haruna Tamaki ◽  
Hiroto Watanabe ◽  
Sachiko Kamiyama ◽  
Yuya Oaki ◽  
Hiroaki Imai
Keyword(s):  
Quantum Dots ◽  
Phonon Coupling ◽  
Size Dependent ◽  
Electron Phonon Coupling
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