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Ultrafast Dynamics of Heliorhodopsins
The Journal of Physical Chemistry B, 2019Heliorhodopsins (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 +9 more
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Physics Today, 1950
Voltage impulses may be helpful, among their other uses, in studying the starting characteristics of physical phenomena which they themselves have initiated.
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Voltage impulses may be helpful, among their other uses, in studying the starting characteristics of physical phenomena which they themselves have initiated.
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Ultrafast spectroscopy of semiconductors
Optics and Photonics News, 1992Ultrafast 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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Physical Chemistry Chemical Physics, 2012
Editorial focusing on ultrafast chemical dynamics.
Wynne, Klaas, Hunt, Neil T.
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Editorial focusing on ultrafast chemical dynamics.
Wynne, Klaas, Hunt, Neil T.
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Ultrafast infrared spectroscopy
Science, 1992Recent 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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The Ultrafast Dynamics of Photodetachment
Annual Review of Physical Chemistry, 2008Photodetachment 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 photodynamics of furan
The Journal of Chemical Physics, 2010Ultrafast 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 +6 more
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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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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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Ultrafast Gain in Semiconductors
Ultrafast Phenomena, 1996Excitonic resonances in direct-gap semiconductors have proved to exhibit similar optical non-linearities as in atoms. One example is the optical Stark effect [1] which occurs when the sample is excited by a strong pump field whose frequency is detuned from the optical transition.
Jean-Pierre Likforman +2 more
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Ultrafast magnetization imaging
Proceedings of the IEEE, 2003The magnetodynamics in low-dimensional ferromagnets has become a major challenge in fundamental physics. The question of interest involves how ferromagnetic systems dissipate excess energy when driven by external magnetic switching field pulse.
Byoung C. Choi +2 more
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