2007
DOI: 10.1007/s11120-007-9265-y
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Four-wave mixing signals from β-carotene and its n = 15 homologue

Abstract: The third-order nonlinear optical responses of beta-carotene and its homologue having a conjugation-double bond n = 15 have been investigated using sub-20 fs ultra-short optical pulses in order to clarify the dissipation processes of excess energy. Using the four-wave mixing spectroscopy, we observed a clear coherent oscillation with a period of a few tens of femtoseconds. The spectral density of these molecules was estimated that allowed the theoretical linear and nonlinear optical signals to be directly comp… Show more

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Cited by 20 publications
(24 citation statements)
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“…FWM signals in carotenoids are reported for β-carotene and its homologues, lycopene, astaxanthin, and spheroidene [47,[57][58][59][60][61][62][63][64][65][66][67][68]. As an example, the results of β-carotene are shown here.…”
Section: Four-wave Mixing (Fwm) Signalmentioning
confidence: 67%
“…FWM signals in carotenoids are reported for β-carotene and its homologues, lycopene, astaxanthin, and spheroidene [47,[57][58][59][60][61][62][63][64][65][66][67][68]. As an example, the results of β-carotene are shown here.…”
Section: Four-wave Mixing (Fwm) Signalmentioning
confidence: 67%
“…This model has successfully explained the TG signals from b-carotene and its homologues [6][7][8]. In this study, we extend the model to the carotenoid molecules bound to the LH2 complexes.…”
Section: Resultsmentioning
confidence: 90%
“…We have so far studied the coherent signals from photosynthetic pigments [5][6][7][8]. The availability of femtosecond pulses allows the use of time-resolved spectroscopic techniques to observe the evolution of spectra in ''real time'' (see, for example, [9][10][11][12][13][14][15][16][17]).…”
Section: Introductionmentioning
confidence: 99%
“…The rise constituent is less prominent on decreasing the excitation frequency. The coherent oscillations were clearly observed when the excitation wavelength is set to the isosbestic point (curve B) which is the excitation condition of our previous studies [10][11][12]. The coherent oscillations and slowly-varying background become weak when the excitation wavelength is on the longer wavelength side (curves C to D).…”
mentioning
confidence: 72%
“…As can be seen, when the TG signal of β-carotene is measured near the absorption edge (more correctly, when pumped at the isosbestic point), the experimental result is well reproduced using Eq. (1) [10][11][12]. However, in the impulsive limit the TG signal does not depend on the excitation wavelength, whereas the experimental results clearly show a strong excitation wavelength dependence (see Fig.…”
Section: Absorbance (Normalized)mentioning
confidence: 85%