Results 261 to 270 of about 135,446 (298)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +2 more sources
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
openaire +2 more sources
Science, 1993
Mise en forme d'une impulsion femtoseconde par un systeme: reseau de diffraction, lentilles, et masque. Emploi de cristaux liquide pour la realisation du masque (modulateur spatial)
M M, Wefers, K A, Nelson
openaire +2 more sources
Mise en forme d'une impulsion femtoseconde par un systeme: reseau de diffraction, lentilles, et masque. Emploi de cristaux liquide pour la realisation du masque (modulateur spatial)
M M, Wefers, K A, Nelson
openaire +2 more sources
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
openaire +2 more sources
Physical Chemistry Chemical Physics, 2012
Editorial focusing on ultrafast chemical dynamics.
Wynne, Klaas, Hunt, Neil T.
openaire +4 more sources
Editorial focusing on ultrafast chemical dynamics.
Wynne, Klaas, Hunt, Neil T.
openaire +4 more sources
1969 International Electron Devices Meeting, 1969
A simple technique is described for gating light on and off on the picosecond time scale. The gate is built in much the same fashion as traditional Kerr cells, the difference lying in the use of powerful optical pulses rather than electrical pulses to induce a birefringence in various liquids. The direct observation of the exponential decay (τ = 32 ± 6
M. A. Duguay, J. W. Hansen
openaire +1 more source
A simple technique is described for gating light on and off on the picosecond time scale. The gate is built in much the same fashion as traditional Kerr cells, the difference lying in the use of powerful optical pulses rather than electrical pulses to induce a birefringence in various liquids. The direct observation of the exponential decay (τ = 32 ± 6
M. A. Duguay, J. W. Hansen
openaire +1 more source
Nature Neuroscience, 2010
Channelrhodopsins such as channelrhodopsin-2 (ChR2) can drive spiking with millisecond precision in a wide variety of cells, tissues and animal species. However, several properties of this protein have limited the precision of optogenetic control. First, when ChR2 is expressed at high levels, extra spikes (for example, doublets) can occur in response ...
Lisa A, Gunaydin +5 more
openaire +2 more sources
Channelrhodopsins such as channelrhodopsin-2 (ChR2) can drive spiking with millisecond precision in a wide variety of cells, tissues and animal species. However, several properties of this protein have limited the precision of optogenetic control. First, when ChR2 is expressed at high levels, extra spikes (for example, doublets) can occur in response ...
Lisa A, Gunaydin +5 more
openaire +2 more sources
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 ...
openaire +1 more source
Ultrafast photodetectors and receivers
Journal of Optical and Fiber Communications Reports, 2005A 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, 2022Peter Baum +2 more
exaly