Three pulse UV photon echo studies of molecules in solution: Effect of the chirp

被引：9

作者：

Ajdarzadeh Oskouei, A. ^{[1
]}

Tortschanoff, A. ^{[1
]}

Braem, O. ^{[1
]}

van Mourik, F. ^{[1
]}

Cannizzo, A. ^{[1
]}

Chergui, M. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, FSB, ISIC, Lab Spect Ultrarapide, CH-1015 Lausanne, Switzerland

来源：

JOURNAL OF CHEMICAL PHYSICS | 2010年 / 133卷 / 06期

基金：

瑞士国家科学基金会;

关键词：

chirp modulation; high-speed optical techniques; molecule-photon collisions; organic compounds; photon echo; ultraviolet spectra; POLAR SOLVATION DYNAMICS; EXCITED-STATE DYNAMICS; PEAK SHIFT; FEMTOSECOND FLUORESCENCE; NONPOLAR SOLVATION; ROOM-TEMPERATURE; SCHIFF-BASE; SPECTROSCOPY; PROTEINS; HETEROGENEITY;

D O I：

10.1063/1.3463448

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on the electronic dephasing times of the nonpolar chromophore diphenylacetylene (DPA) in ethanol and in cyclohexane (polar and nonpolar solvents respectively) by photon echo measurements in the ultraviolet. Contrary to previous reports, we observed sub-100-fs electronic dephasing times for DPA in both solvents. We identify fast dynamics of tau=40 +/- 10 fs on the photon echo peak shift (PEPS) traces of DPA in ethanol. In addition, we observed a dependence of the PEPS asymptotic value on the temporal chirp of the pulses. We propose a model to describe it in terms of phase-matching condition and beam geometry. (C) 2010 American Institute of Physics. [doi:10.1063/1.3463448]

引用

页数：7

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