scholarly journals Coherent wavepacket motion in an ultrafast electron transfer system monitored by femtosecond degenerate four-wave-mixing and pump–probe spectroscopy

2014 ◽  
Vol 442 ◽  
pp. 68-76 ◽  
Author(s):  
Yutaka Nagasawa ◽  
Yusuke Yoneda ◽  
Shohei Nambu ◽  
Masayasu Muramatsu ◽  
Eisuke Takeuchi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Four Wave Mixing ◽  
Transfer System ◽  
Wave Mixing ◽  
Pump Probe ◽  
Electron Transfer System ◽  
Degenerate Four Wave Mixing ◽  
Probe Spectroscopy ◽  
Ultrafast Electron Transfer

Enhanced Third Order Optical Nonlinear Response in Polythiophene Films—Polaron Contributions

1989 ◽  
Vol 173 ◽  
Author(s):  
Lina Yang ◽  
R. Dorsinville ◽  
R. Zamboni ◽  
C. Taliani ◽  
R. Tubino ◽  
...  
Keyword(s):  
Nonlinear Response ◽  
Four Wave Mixing ◽  
Nonlinear Susceptibility ◽  
Wave Mixing ◽  
Third Order ◽  
Pump Probe ◽  
Order Of Magnitude ◽  
Degenerate Four Wave Mixing ◽  
Thiophene Based Polymers ◽  
Third Order Nonlinear Susceptibility

ABSTRACTThe enhancement of the third order nonlinear susceptibility χ(3)) of an homologous series of polycondensed thiophene based polymers was observed about photoinduced polaronic bands by a novel “pump-probe” degenerate four wave mixing echnique. Enhancement of the degenerate four wave mixing signal for more than an order of magnitude was achieved with response time of less than 25 ps. The intrachain polarons contribution is proposed as the possible mechanism responsible for the observed enhancement.

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