Journal ArticleDOI
Oscillatory femtosecond relaxation of photoexcited organic molecules
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In this paper, the ultrafast relaxation of large organic molecules in solution has been investigated with the transmission correlation technique, and the existence of damped sinusoidal decays after photoexcitation has been verified for several organic dyes.Abstract:
The ultrafast relaxation of large organic molecules in solution has been investigated with the transmission correlation technique. The existence of damped sinusoidal decays after photoexcitation has been verified for several organic dyes. This behavior (the first such decay observed on a femtosecond time scale for any material) is explained as quantum beats. For all molecules examined, we have also observed fast initial exponential decays (<100 fs) in addition to previously known picosecond processes.read more
Citations
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Journal ArticleDOI
Control of quantum phenomena: past, present and future
TL;DR: Adaptive feedback control (AFC) as mentioned in this paper is a state-of-the-art technique for quantum control. But it is not suitable for the case of femtosecond laser sources.
Journal ArticleDOI
Femtosecond Pulse Sequences Used for Optical Manipulation of Molecular Motion
TL;DR: Optical control over elementary molecular motion is enhanced with timed sequences of femtosecond pulses produced by pulse-shaping techniques, analogous to repetitively pushing a child on a swing with appropriate timing to build up a large oscillation amplitude.
Journal ArticleDOI
Femtosecond studies of solvation and intramolecular configurational dynamics of fluorophores in liquid solution.
Max Glasbeek,Hong Zhang +1 more
Journal ArticleDOI
Evolution of the vibronic absorption spectrum in a molecule following impulsive excitation with a 6 fs optical pulse
TL;DR: In this article, a 6 fs optical pulse was used to impulsively excited the entire manifold of Franck-Condon-connected vibronic levels for the S 0 to S 1 transition in an organic dye in solution.
PatentDOI
Broadly tunable high repetition rate femtosecond optical parametric oscillator
TL;DR: In this paper, a tunable, singley-resonant optical parametric oscillator provides femtosecond light pulses in the infrared wavelength band, including an internally mounted thin crystal of KTiOPO 4 which is synchronously pumped by femto-cond pulses from a colliding-pulse passively mode-locked dye laser.
References
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Journal ArticleDOI
Retrieval of frequencies, amplitudes, damping factors, and phases from time-domain signals using a linear least-squares procedure
TL;DR: A new method for quantitative analysis of time-domain signals that is insensitive to truncation at the beginning and/or the end of the signal, and is capable to accurately reconstruct the missing part, and achieves higher resolution than fast Fourier transformation.
Journal ArticleDOI
Die Viskositätsabhängigkeit der Fluoreszenzquantenausbeuten einiger Farbstoffsysteme
Th. Förster,G. Hoffmann +1 more
TL;DR: Oster et al. as mentioned in this paper untersuchten an dem Diphenylmethanfarbstoff Auramin 0 the Zunahme der Pluoreszenzausbeute with der Viskosität in Mischungen von Wasser, Glycerin, and Glukose verschiedener Zusammensetzungen and Temperaturen.
Journal ArticleDOI
Generation of optical pulses as short as 27 femtoseconds directly from a laser balancing self-phase modulation, group-velocity dispersion, saturable absorption, and saturable gain
TL;DR: An ultrasbort-pulse laser is described that, under specific operating conditions, balances the mechanisms of conventional passive mode locking and solitonlike pulse shaping in a single resonator to generate optical pulses that are to the authors' knowledge the shortest yet emitted directly from a laser.
Journal ArticleDOI
Femtosecond relaxation dynamics of large molecules.
TL;DR: In this paper, the ultrafast relaxation in solution of two large organic molecules, malachite green and nile blue 690, has been investigated with the equal-pulse correlation technique.
Journal ArticleDOI
Hydrodynamic theory for vibrational dephasing in liquids
TL;DR: In this article, a hydrodynamic model is presented for the dephasing of molecular vibrations in liquids; the effects of vibrational anharmonicity are included. But the final result shows a surprising formal similarity to the isolated binary collision model developed previously.