Picosecond pump-probe studies of energy relaxation in aggregates of pseudoisocyanine adsorbed on colloidal silica

1988 ◽  
Author(s):  
Edward L. Quitevis ◽  
Miin-Liang Horng ◽  
Sun-Yung Chen
Keyword(s):  
Colloidal Silica ◽  
Energy Relaxation ◽  
Pump Probe

scholarly journals Simulating Energy Relaxation in Pump–Probe Vibrational Spectroscopy of Hydrogen-Bonded Liquids

2017 ◽  
Vol 13 (3) ◽  
pp. 1284-1292 ◽  
Author(s):  
Riccardo Dettori ◽  
Michele Ceriotti ◽  
Johannes Hunger ◽  
Claudio Melis ◽  
Luciano Colombo ◽  
...  
Keyword(s):  
Vibrational Spectroscopy ◽  
Energy Relaxation ◽  
Pump Probe ◽  
Hydrogen Bonded

scholarly journals Slow Relaxation Processes in SF6 Gas After Pumping by a CO2 Laser Pulse

1991 ◽  
Vol 11 (1) ◽  
pp. 39-48
Author(s):  
Iwao Kitazima ◽  
Hiroshi Iwasawa
Keyword(s):  
Molecular Diffusion ◽  
Vibrational Energy ◽  
Pump Intensity ◽  
Energy Relaxation ◽  
Probe Method ◽  
Relaxation Processes ◽  
Gas Cell ◽  
Vibrational Energy Relaxation ◽  
Pump Probe ◽  
Gas Cooling

The vibrational energy relaxation and distribution in SF6 at the collisional condition of 2 Torr was measured with the pump-probe method by use of two tunable CO2 300 ns-pulse lasers at the delay time up to 400 μs. The 10.6 μs P(30) pump intensity was 0.4 J/cm2. The probed spectra, divided into two parts, the induced transmission at the P(10)–P(22) and the absorption at the P(24)–P(32), were red-shifted by 50 μs and then slowly back to the initial. The time variation of induced signals was divided into the four regions due to the following processes; (I) the formation of nonthermal distribution in the ν3 mode and quasi-continuum with 1 μs, (II) the broad redistribution by the rise-up of vibrational temperature in 50 μs-duration, (III) the molecular diffusion or expansion out of the pumped region locally heated up by the V–T relaxation in another 60 μs, (IV) the gas cooling corresponding to the energy relaxation or population depletion over 400 μs. So, this pump-probe method at the collisional conditions will easily give us some informations, with a short gas cell and a suitable time scale, on those slow processes.

scholarly journals Energy Relaxation and Thermal Diffusion in Infrared Pump–Probe Spectroscopy of Hydrogen-Bonded Liquids

2019 ◽  
Vol 10 (12) ◽  
pp. 3447-3452 ◽  
Author(s):  
Riccardo Dettori ◽  
Michele Ceriotti ◽  
Johannes Hunger ◽  
Luciano Colombo ◽  
Davide Donadio
Keyword(s):  
Thermal Diffusion ◽  
Energy Relaxation ◽  
Pump Probe ◽  
Probe Spectroscopy ◽  
Hydrogen Bonded
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