Results 141 to 150 of about 261,800 (180)

High-Order Harmonic Generation in Helium

Shortwavelength V: Physics with Intense Laser Pulses, 1993
We report the observation of harmonics up to 119th in helium, generated using a 1.053μm. 1ps CPA laser at intensities up to 3×1014 W/cm2 and have measured their spatial distribution. Complex spatial distributions are found for harmonics in the plateau region and near the cut-off, their angular distribution narrows to values similar to that predicted by
J. G. W. Tisch, R. A. Smith, M. Ciarrocca, J. P. Marangos, M. H. R. Hutchinson   +4 more
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High Order Harmonic generation with Molecules

Applications of High Field and Short Wavelength Sources VII, 1997
We present results for high order harmonic generation with atoms and molecules using high intensity laser light at 800 nm. Pulses of 150 fs duration were focused to peak intensities on the order of 1016 W/cm2 in a gas jet. The goal is to study the dependence of harmonic efficiency on polarizability, ionization potential and structure.
S. Evans, L.D. Van Woerkom
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Toward efficient high order harmonic generation

Le Journal de Physique IV, 2000
In order to maximize its efficiency, we study high harmonic generation in absorbing and dispersive atomic gas media for both the case of a loosely focused Gaussian beam or a beam guided in a capillary waveguide. For ultrashort fundamental pulses, the harmonic conversion efficiency is ultimately limited by the absorption in the gas.
E. Constant, E. Mével, D. Garzella, P. Breger, C. Dorrer, C. Le Blanc, F. Salin, P. Agostini   +7 more
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High-Order Harmonic Generation

2001
Thanks to the invention of the laser in 1960, intensities never reached before became available allowing the observation of a number of new phenomena. Among them, the discovery in 1961 of optical harmonic generation by Franken et al. 1marked the birth of nonlinear optics, one of the richest field in optics that has found applications in nearly all ...
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High order harmonic generation in graphene

2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2017
Single layer graphene (SLG) has remarkable physical properties, with potential interest in the fields of electronics and photonics. While being single-atom thick, SLG presents a rather strong optical response, as a large optical absorption, resonance for all excitation frequencies up to the vacuum UV and, therefore, a strong broadband linear response ...
Oscar Zurron, Jose Manuel Iglesias, Raul Rengel, Maria Jesus Martin, Luis Plaja   +4 more
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Next Generation High-Order Harmonic Sources

Nonlinear Optics, 2017
Recent efforts on high harmonic generation by using new pump laser technology, including double-chirped optical parametric amplification and high energy three-color laser synthesizer, are reported.
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High-order harmonic generation and ATI

Optical Society of America Annual Meeting, 1991
We have previously developed a two-color above threshold ionization (ATI) model and used it to study the photoelectron spectra and the angular distribution of the photoelectron.1 We present calculations of the photon spectrum from recombination of the electron within the context of this model.
L. Wang, J. W. Haus, K. Rzazewski
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High-Order Harmonic Generation and Plasmonics

2014
Attosecond pulses allow for imaging of very fast processes, like electron dynamics. Stockman et al. suggested to use these pulses in connection with a Photoemission electron microscope (PEEM) to study the ultrafast dynamics of plasmons (Stockman et al. Nat Photonics 1:539–544, 2007).
Eleonora Lorek, E. W. Larsen, C. M. Heyl, P. Rudawski, M. Miranda, C. Guo, E. Mårsell, S. Carlström, C. L. Arnold, D. Paleček, D. Zigmantas, A. Mikkelsen, A. L’Huillier, J. Mauritsson   +13 more
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Applications of high-order harmonic generation

AIP Conference Proceedings, 2000
We present a review of recent research in Lund on applications of high-order harmonic generation. First, we have used high-order harmonics in spectroscopic studies of atoms and molecules. The experimental technique is based on a pump-probe scheme, where the pump pulse is a high-order harmonic synchronized with a laser pulse (probe).
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High-order harmonic generation after photodissociation

Journal of Physics B: Atomic, Molecular and Optical Physics, 1998
High-order harmonic generation spectra obtained from a photodissociating molecule extend to photon energies up to eight times the ponderomotive energy when the electron is ionized from one of the fragments and recombines with the other. A detailed simulation is presented for the hydrogen molecular ion that describes the photodissociation and high-order
R Numico, P Moreno, L Plaja, L Roso
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