Role of cyclic sets of transition dipoles in the pump–probe polarization anisotropy: Application to square symmetric molecules and perpendicular chromophore pairs

2003 ◽  
Vol 119 (3) ◽  
pp. 1611-1622 ◽  
Author(s):  
Wei Qian ◽  
David M. Jonas
Keyword(s):  
Polarization Anisotropy ◽  
Pump Probe ◽  
Cyclic Sets

scholarly journals Nonequilibrium electron dynamics in pump-probe spectroscopy: Role of excited phonon populations

2018 ◽  
Vol 98 (24) ◽  
Author(s):  
O. Abdurazakov ◽  
D. Nevola ◽  
A. Rustagi ◽  
J. K. Freericks ◽  
D. B. Dougherty ◽  
...  
Keyword(s):  
Electron Dynamics ◽  
Nonequilibrium Electron ◽  
Pump Probe ◽  
Probe Spectroscopy

Microscopic evidence for role of oxygen in luminescence ofEr3+ions in Si: Two-color and pump-probe spectroscopy

2008 ◽  
Vol 78 (3) ◽  
Author(s):  
S. Minissale ◽  
N. Q. Vinh ◽  
W. de Boer ◽  
M. S. Bresler ◽  
T. Gregorkiewicz
Keyword(s):  
Pump Probe ◽  
Microscopic Evidence ◽  
Probe Spectroscopy

scholarly journals Understanding the Seeding Pulse-Induced Optical Amplification in N 2 + Pumped by 800 NM Femtosecond Laser Pulses

Photonics ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 99
Author(s):  
Zhengquan Fan ◽  
Xiang Zhang ◽  
Qi Lu ◽  
Yu Luo ◽  
Qingqing Liang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Optical Gain ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Time Resolved ◽  
Optical Amplification ◽  
Pump Probe ◽  
Amplification Process ◽  
Energy Amplification

Nitrogen ions pumped by intense femtosecond laser pulses present an optical gain at 391.4 nm, evident by energy amplification of an injected resonant seeding pulse. We report a time-resolved measurement of the amplification process with seeding pulses having varying intensities. It is found that the amplification factor depends on the intensity of the seeding pulse and the effective temporal window for the optical gain becomes longer by applying more intense seeding pulses. These two features are in sharp contrast with classic pump-probe experiments, pinpointing the crucial role of macroscopic coherence and its dynamics during the lasing process. We further measure the temporal profile of the amplified emission for seeding pulse injected at different time delays. A complicated temporal behavior is observed, which highlights the nature of the superfluorescence.

Key Role of the Polarization Anisotropy of Water in Modeling Classical Polarizable Force Fields

2007 ◽  
Vol 111 (33) ◽  
pp. 8170-8176 ◽  
Author(s):  
Jean-Philip Piquemal ◽  
Riccardo Chelli ◽  
Piero Procacci ◽  
Nohad Gresh
Keyword(s):  
Force Fields ◽  
Polarization Anisotropy ◽  
Polarizable Force Fields
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