Results 231 to 240 of about 51,747 (268)

Ultrafast Dynamics in DNA

Ultrafast Phenomena, 2000
A DNA base pair has been replaced by a coumarin, and the DNA’s “solvation” dynamics monitored by time-resolved Stokes shift measurements. The shift is logarithmic in time, indicating an extremely broad distribution of relaxation times.
Eric B. Brauns, Catherine J. Murphy, Mark A. Berg, Mihaela M. Madaras, Robert S. Coleman   +4 more
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Ultrafast Dynamics of Heliorhodopsins

The Journal of Physical Chemistry B, 2019
Heliorhodopsins (HeR) constitute a new rhodopsin family and show only 650 nm region, and these transient signals decay concomitantly with appearance of photoproduct absorption on a subpicosecond time scale. The observed spectral change indicates that ultrafast retinal photoisomerization proceeds in the femtosecond time region. The transient spectra and
Shinya Tahara, Manish Singh, Hikaru Kuramochi, Wataru Shihoya, Keiichi Inoue, Osamu Nureki, Oded Béjà, Yasuhisa Mizutani, Hideki Kandori, Tahei Tahara   +9 more
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Ultrafast spectroscopy of semiconductors

Optics and Photonics News, 1992
Ultrafast laser spectroscopy with time resolution down to 6 femtoseconds has been applied to study optical dephasing, relaxation, and recombination in various semiconductors and semiconductor microstructures. We report some applications of ultrafast laser spectroscopy to bulk and quantum well III–V and II–VI semiconductors in order to illustrate the ...
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Ultrafast infrared spectroscopy

Science, 1992
Recent advances in ultrafast infrared spectroscopy are described, including experimental details and fundamental limitations. The utility of this technique is illustrated with two recent examples.
P O, Stoutland, R B, Dyer, W H, Woodruff
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Ultrafast Cognition

2012
Observations of ultrafast cognition in human performance challenge intuitive information processing and computation metaphors of cognitive processing. Instances of ultrafast cognition are marked by ultrafast response times of reliable, accurate responses to a relatively complex stimulus.
Wallot, Sebastian, Van Orden, Guy
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The Ultrafast Dynamics of Photodetachment

Annual Review of Physical Chemistry, 2008
Photodetachment is a general property of condensed-phase anions exposed to visible or ultraviolet light, but its mechanism has not been fully explored until recently. The combination of femtosecond pump-probe experiments in both bulk liquids and solvated clusters and quantum mechanical descriptions of the relevant excited states has provided new ...
Xiyi, Chen, Stephen E, Bradforth
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Ultrafast chemical dynamics

Physical Chemistry Chemical Physics, 2012
Editorial focusing on ultrafast chemical dynamics.
Wynne, Klaas, Hunt, Neil T.
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Ultrafast photodynamics of furan

The Journal of Chemical Physics, 2010
Ultrafast photodynamics of furan has been studied by time-resolved photoelectron imaging (TRPEI) spectroscopy with an unprecedented time resolution of 22 fs. The simulation of the time-dependent photoelectron kinetic energy distribution (PKED) has been performed with ab initio nonadiabatic dynamics “on the fly” in the frame of time-dependent density ...
Takao, Fuji, Yoshi-Ichi, Suzuki, Takuya, Horio, Toshinori, Suzuki, Roland, Mitrić, Ute, Werner, Vlasta, Bonačić-Koutecký   +6 more
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Ultrafast photodetectors and receivers

Journal of Optical and Fiber Communications Reports, 2005
A family of ultrafast photodetectors and photoreceivers, based on evanescently coupled photodiodes, is described. The waveguide-integrated detectors are monolithically integrated with HEMTs, employing semi-insulating optical waveguides on a semi-insulating InP:Fe substrate.
openaire   +1 more source

Polarized phonons carry angular momentum in ultrafast demagnetization

Nature, 2022
Peter Baum, Alexander Book, Daniel Kazenwadel   +2 more
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