TITLE

Damping of the tunneling mechanism in high-order harmonic generation processes induced by femtosecond visible laser pulses

AUTHOR(S)
Simoncig, A.; Caretta, A.; Ressel, B.; Poletto, L.; Parmigiani, F.
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/27/2009, Vol. 95 Issue 4, p041107
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The high-order harmonic generation (HHG) of coherent light pulses in gases is strictly dependent on the ionization dynamics that delocalizes the electron wave function in the laser field continuum. Here we report on the investigation of such dynamics by varying the energy of a 400 nm, 60 fs driving laser pulse. The experimental data provide the unambiguous evidence of a hybrid dynamical region, not described by the full-tunneling approximation models, where the HHG photon number exponentially decays when the Keldysh parameter is varied from 1 to 3. Finally, a phenomenological model, suitable to account for this hybrid regime, is reported.
ACCESSION #
43494226

 

Related Articles

  • Optical breakdown of air triggered by femtosecond laser filaments. Polynkin, Pavel; Moloney, Jerome V. // Applied Physics Letters;10/10/2011, Vol. 99 Issue 15, p151103 

    We report experiments on the generation of dense plasma channels in ambient air using a dual laser pulse excitation scheme. The dilute plasma produced through the filamentation of an ultraintense femtosecond laser pulse is densified via avalanche ionization driven by a co-propagating multi-Joule...

  • Analysis of sunlight loss for femtosecond laser microstructed silicon and its solar cell efficiency. Fang, Wang; Changshui, Chen; Huili, He; Songhao, Liu // Applied Physics A: Materials Science & Processing;Jun2011, Vol. 103 Issue 4, p977 

    Black silicon, which is obtained by irradiating the surface of a Si wafer with femtosecond laser pulses in the presence of a sulfur-bearing gas, holds great promise in the preparation of high-performance intermediate band silicon solar cells. Using a three-level model, the enhanced usefulness of...

  • Change in the spectrum of optical radiation transmitted through a plasma with an increase in the ionization degree. Bukin, V.; Garnov, S.; Trofimov, A. // JETP Letters;Jul2011, Vol. 93 Issue 10, p568 

    The blueshift of a probe laser pulse propagating in an unsteady plasma has been experimentally detected. The possibility of using this method for the diagnostic of the dense femtosecond plasma has been demonstrated.

  • N2O ionization and dissociation dynamics in intense femtosecond laser radiation, probed by systematic pulse length variation from 7 to 500 fs. Karimi, Reza; Bisson, Éric; Walles, B.; Beaulieu, Samuel; Giguère, Mathieu; Long, ZiJian; Liu, Wing-Ki; Kieffer, Jean-Claude; Légaré, François; Sanderson, Joseph // Journal of Chemical Physics;May2013, Vol. 138 Issue 20, p204311 

    We have made a series of measurements, as a function of pulse duration, of ionization and fragmentation of the asymmetric molecule N2O in intense femtosecond laser radiation. The pulse length was varied from 7 fs to 500 fs with intensity ranging from 4 × 1015 to 2.5 × 1014 W/cm2. Time...

  • Optimal control of filamentation in air. Ackermann, Roland; Salmon, Estelle; Lascoux, Noëlle; Kasparian, Jérôme; Rohwetter, Philipp; Stelmaszczyk, Kamil; Shaohui Li; Lindinger, Albrecht; Wöste, Ludger; Béjot, Pierre; Bonacina, Luigi; Wolf, Jean-Pierre // Applied Physics Letters;10/23/2006, Vol. 89 Issue 17, p171117 

    The authors demonstrate optimal control of the propagation of ultrashort, ultraintense (multiterawatt) laser pulses in air over distances up to 36 m in a closed-loop scheme. They optimized three spectral ranges within the white-light continuum as well as the ionization efficiency. Optimization...

  • The Generation of a Dense Hot Plasma by Intense Subpicosecond Laser Pulses. Andreev, N. E.; Veisman, M. E.; Efremov, V. P.; Fortov, V. E. // High Temperature;Sep/Oct2003, Vol. 41 Issue 5, p594 

    A simple model is developed for describing the interaction of intense femtosecond laser pulses with solid-state targets which is based on a set of equations of two-temperature hydrodynamics for electrons and ions of a plasma formed upon ionization of the target matter, equations describing the...

  • Time-dependent quantum chemistry of laser driven many-electron molecules. Thanh-Tung Nguyen-Dang; Couture-Bienvenue, Étienne; Viau-Trudel, Jérémy; Sainjon, Amaury // Journal of Chemical Physics;12/282014, Vol. 141 Issue 24, p1 

    A Time-Dependent Configuration Interaction approach using multiple Feshbach partitionings, corresponding to multiple ionization stages of a laser-driven molecule, has recently been proposed [T.-T. Nguyen-Dang and J. Viau-Trudel, J. Chem. Phys. 139,244102 (2013)]. To complete this development...

  • Theory of multilevel atom ionization. Andreev, A. V.; Stremoukhov, S. Yu.; Shoutova, O. A. // AIP Conference Proceedings;4/16/2010, Vol. 1228 Issue 1, p92 

    We present the results of computer simulations on ionization of multilevel atom by femtosecond laser pulse in wide range of its intensity, from low intensities to intensities that overcome atomic one I0 = 3.5·1016 W/cm2. The quantitative results are obtained for the case of silver atom...

  • Dissociative double ionization of 1-bromo-2-chloroethane irradiated by an intense femtosecond laser field. Yang, Yan; Fan, Lulu; Sun, Shengzhi; Zhang, Jian; Chen, Yuting; Zhang, Shian; Jia, Tianqing; Sun, Zhenrong // Journal of Chemical Physics;8/14/2011, Vol. 135 Issue 6, p064303 

    The dissociative double ionization and multi-photon ionization of 1-bromo-2-chloroethane (BCE) irradiated by the 800 nm femtosecond laser field have been investigated by dc-slice imaging technology. The charged parent ion ratio [BCE2+]/[BCE+] was measured, and the corresponding ionization...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics