Results 1 to 10 of about 5,782,871 (345)

Fractional-Order Modeling of a Multistable Erbium-Doped Fiber Laser

Photonics
We propose a novel mathematical model of a multistable erbium-doped fiber laser based on Caputo fractional derivative equations. The model is used to investigate how the laser dynamics evolve as the derivative order is varied.
Jorge Eduardo Silva Gómez, José de Jesús Barba Franco, Luís Armando Gallegos Infante, Juan Hugo García López, Rider Jaimes Reátegui, Alexander N. Pisarchik   +5 more
doaj   +1 more source

Surface plasma resonance in small rare gas clusters by mixing IR and VUV laser pulses

, 2004
The ionization dynamics of a Xenon cluster with 40 atoms is analyzed under a pum p probe scenario of laser pulses where an infrared laser pulse of 50 fs length follows with a well defined time delay a VUV pulse of the same length and peak intensity.
Christian Siedschlag, I. Last, Jan M. Rost   +2 more
core   +1 more source

Controlled Shock Shells and Intracluster Fusion Reactions in the Explosion of Large Clusters

, 2006
The ion phase-space dynamics in the Coulomb explosion of very large ($\sim 10^6 - 10^7$ atoms) deuterium clusters can be tailored using two consecutive laser pulses with different intensities and an appropriate time delay.
Fonseca, R. A., Martins, J. L., Peano, F., Silva, L. O.   +3 more
core   +1 more source

Ultrafast myoglobin structural dynamics observed with an X-ray free-electron laser

Nature Communications, 2015
Light absorption can trigger biologically relevant protein conformational changes. The light-induced structural rearrangement at the level of a photoexcited chromophore is known to occur in the femtosecond timescale and is expected to propagate through ...
M. Levantino, G. Schirò, H. Lemke, G. Cottone, J. Glownia, D. Zhu, M. Chollet, H. Ihee, A. Cupane, M. Cammarata   +9 more
semanticscholar   +1 more source

On-chip petahertz electronics for single-shot phase detection

Nature Communications
Attosecond science has demonstrated that electrons can be controlled on the sub-cycle time scale of an optical waveform, paving the way towards optical frequency electronics.
Felix Ritzkowsky, Matthew Yeung, Engjell Bebeti, Thomas Gebert, Toru Matsuyama, Matthias Budden, Roland E. Mainz, Huseyin Cankaya, Karl K. Berggren, Giulio Maria Rossi, Phillip D. Keathley, Franz X. Kärtner   +11 more
doaj   +1 more source

Algorithm for constructing asymptotics of periodic solutions in laser models with a rapidly oscillating delay

Моделирование и анализ информационных систем
The problem of stability of the equilibrium state in a laser system with fast oscillating coefficients is considered. A system averaged over fast oscillations and with a distributed delay is constructed.
Elena V. Grigorieva, Dmitry V. Glazkov, Anna O. Tolbey   +2 more
doaj   +1 more source

Theory for the ultrafast ablation of graphite films

, 2001
The physical mechanisms for damage formation in graphite films induced by femtosecond laser pulses are analyzed using a microscopic electronic theory.
A. De Vita, A. M. Lindenberg, B. C. Stuart, C. H. Xu, D. H. Reitze, D. von der Linde, D. W. Brenner, H. O. Jeschke, Harald O. Jeschke, J. C. Slater, J. Krüger, J. N. Glosli, J.-C. Charlier, K. H. Bennemann, K. Sokolowski-Tinten, K. Sokolowski-Tinten, K. Sokolowski-Tinten, K. Sokolowski-Tinten, M. Lenzner, Martin E. Garcia, P. L. Silvestrelli, P. L. Silvestrelli, P. Stampfli, P. Stampfli, W. H. Knox   +24 more
core   +1 more source

A Monolithically Integrated Laser-Photodetector Chip for On-Chip Photonic and Microwave Signal Generation

Photonics, 2019
An Indium-phosphide-based monolithically integrated photonic chip comprising of an amplified feedback laser (AFL) and a photodetector was designed and fabricated for on-chip photonic and microwave generation.
Hefei Qi, Guangcan Chen, Dan Lu, Lingjuan Zhao   +3 more
doaj   +1 more source

Role of critical spin fluctuations in ultrafast demagnetization of transition-metal rare-earth alloys

, 2013
Ultrafast magnetization dynamics induced by femtosecond laser pulses have been measured in ferrimagnetic Co0.8Gd0.2, Co.74Tb.26 and Co.86Tb.14 alloys. Using element sensitivity of X-ray magnetic circular dichroism at the Co L3, Tb M5 and Gd M5 edges we ...
Beaurepaire, E., Bergeard, N., Boeglin, C., Halte, V., Hehn, M., Lopez-Flores, V., Otero, E., Pontius, N., Stamm, C   +8 more
core   +3 more sources

Multiple Ionization Bursts in Laser-Driven Hydrogen Molecular Ion

, 2010
Theoretical study on H$_2^+$ in an intense infrared laser field on the attosecond time-scale reveals that the molecular ion shows multiple bursts of ionization within a half-cycle of the laser field oscillation, in contrast to the widely accepted tunnel ...
Andreas Becker, L. D. Landau, M. Yu. Ivanov, Norio Takemoto   +3 more
core   +1 more source