Vibrational phase characterization in femtosecond-pumped molecules by path-length modulation pump–probe spectroscopy

Taneichi, Takashi; Fuji, Takao; Yuasa, Yoshiharu; Kobayashi, Takayoshi

doi:10.1016/j.cplett.2004.07.039

Cited by 12 publications

(7 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method was applied to a heme protein, and the amplitude and phase profiles of coherent oscillations were successfully reproduced for both of electric-field-driven and reaction-driven coherences . This approach has been used also for other systems to obtain a physical insight from the observed pump−probe signals. , Although the optical process of femtosecond time-resolved absorption spectroscopy can be treated more generally in the framework of the third-order nonlinear optical process using density matrix formalism, the approach based on the linear response theory provides a more intuitive picture.…”

Section: Introductionmentioning

confidence: 99%

“…14 This approach has been used also for other systems to obtain a physical insight from the observed pump-probe signals. 21,22 Although the optical process of femtosecond timeresolved absorption spectroscopy can be treated more generally in the framework of the third-order nonlinear optical process using density matrix formalism, 23 the approach based on the linear response theory provides a more intuitive picture.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pronounced Non-Condon Effect as the Origin of the Quantum Beat Observed in the Time-Resolved Absorption Signal from Excited-State cis-Stilbene

2008

View full text Add to dashboard Cite

We carried out wavelength-dispersed time-resolved absorption measurements of cis-stilbene to investigate the mechanism of the appearance of the approximately 220 cm-1 oscillation, which has been assigned to the nuclear wavepacket motion of the S1 state. The observed oscillatory pattern showed almost same amplitude and phase across the absorption peak at 645 nm, which indicates that the modulation of the transition intensity gives rise to the quantum beat. We also carried out a semiquantitative numerical simulation of the time-resolved absorption spectra based on the effective linear response theory, in which we newly incorporated the Herzberg-Teller coupling model by introducing a coordinate-dependence of the transition moment. The results of these experiments and simulation clearly showed that the intensity of the quantum beat arises from a significant coordinate dependence of the Sn<--S1 transition moment, i.e., non-Condon effect. It was concluded that the vibronic coupling of the Sn state with other electronic states is so large that the Herzberg-Teller coupling predominantly contributes to the intensity of the quantum beat of the totally symmetric approximately 220 cm-1 vibration. The present work suggests a general importance of the non-Condon effect in spectroscopy involving highly excited electronic states.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pronounced Non-Condon Effect as the Origin of the Quantum Beat Observed in the Time-Resolved Absorption Signal from Excited-State cis-Stilbene

2008

View full text Add to dashboard Cite

show abstract

“…The absorbance change induced by the pump pulse is approximately constant up to 1800 fs, due to the 1.3 ns lifetime of HDITC. [15] from previous papers [13,14] ] having differences smaller than 21 cm À1 . The differences are assumed to be due to the different dielectric constants and the different viscosities of the used solvents; Glycol ethylene, which was used in the previous studies, has a dielectric constant of 37.7 at 25 8C, while ethanol, which was used in the present study, has a dielectric constant of 24.6 at 25 8C.…”

Section: Evolution Of the Spectral And Temporal Shapes Of The Lasermentioning

confidence: 58%

Electronic and Vibrational Coherence Dynamics in a Cyanine Dye Studied Using a Few‐Cycle Pulsed Laser

Wang

Kobayashi

2010

ChemPhysChem

Self Cite

View full text Add to dashboard Cite

We report the relaxation times of electronic and vibrational coherence in the cyanine dye 1,1',3,3,3',3'-hexamethyl-4,4',5,5'-dibenzo-2,2'-indotricarbocyanine, measured using a 7.1 fs pulsed laser. The vibrational phase relaxation times are found to be between 380 and 680 fs in the ground and lowest excited singlet states. The vibrational dephasing times of the 294, 446, and 736 cm(-1) modes are relatively long among the six modes associated with excited-state wave packets. The slower relaxations are explained in terms of a coupled triplet of vibrational modes, which preserves coherence by forming a tightly bound group to satisfy the condition of circa conservation of vibrational energy. Using data from the negative-time range (i.e., when the probe pulse precedes the pump pulse), the electronic phase relaxation time is found to be 31+/-1 fs. The dynamic vibrational mode in the excited state (1171 cm(-1)), detected in the positive-time range, is also studied from the negative-time traces under the same experimental conditions.

show abstract

“…The signal from 40 to 1800 fs is extended in the ordinate direction (see insets) to reveal pronounced vibrations in this time range. The absorbance change induced by the pump pulse is approximately constant up to 1800 fs, due to the 1.3 ns lifetime of HDITC 15…”

Section: Resultsmentioning

confidence: 99%

Cover Picture: Ultrafast Charge‐Transfer Reactions of Indoline Dyes with Anchoring Alkyl Chains of Varying Length in Mesoporous ZnO Solar Cells (ChemPhysChem 5/2015)

et al. 2015

View full text Add to dashboard Cite

Vibrational phase characterization in femtosecond-pumped molecules by path-length modulation pump–probe spectroscopy

Cited by 12 publications

References 25 publications

Pronounced Non-Condon Effect as the Origin of the Quantum Beat Observed in the Time-Resolved Absorption Signal from Excited-State cis-Stilbene

Pronounced Non-Condon Effect as the Origin of the Quantum Beat Observed in the Time-Resolved Absorption Signal from Excited-State cis-Stilbene

Electronic and Vibrational Coherence Dynamics in a Cyanine Dye Studied Using a Few‐Cycle Pulsed Laser

Cover Picture: Ultrafast Charge‐Transfer Reactions of Indoline Dyes with Anchoring Alkyl Chains of Varying Length in Mesoporous ZnO Solar Cells (ChemPhysChem 5/2015)

Contact Info

Product

Resources

About