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Intense harmonic generation from silver ablation

Published online by Cambridge University Press:  19 June 2007

T. Ozaki ,
L.B. Elouga Bom ,
R. Ganeev ,
J.-C. Kieffer ,
M. Suzuki  and
H. Kuroda
T. Ozaki
Affiliation:
INRS-EMT, Université du Québec, Varennes, Québec, Canada
L.B. Elouga Bom
Affiliation:
INRS-EMT, Université du Québec, Varennes, Québec, Canada
R. Ganeev
Affiliation:
INRS-EMT, Université du Québec, Varennes, Québec, Canada
J.-C. Kieffer
Affiliation:
INRS-EMT, Université du Québec, Varennes, Québec, Canada
M. Suzuki
Affiliation:
The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba, Japan
H. Kuroda
Affiliation:
The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba, Japan
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Abstract

We perform systematic investigation of a new method for generating high-order harmonics, using ablation as the nonlinear medium. We place emphasis on clarifying the pump laser conditions for optimum harmonic yield. For this purpose, we use the Ti:Sapphire laser beams of the advanced laser light source (800 nm wavelength, 360 mJ total energy). We have independently varied the intensity of the prepulse (which creates the plasma ablation) and the intensity of the main pulse (which generates the harmonics), and studied their influence on the harmonic intensity. We show here that the presence of doubly ionized atoms in the ablation, created either by a strong prepulse intensity or by irradiating the main pulse, will suppress harmonic generation.

Keywords

AblationHigh harmonic generation
Type
Research Article
Information
Laser and Particle Beams , Volume 25 , Issue 2 , June 2007 , pp. 321 - 325
Copyright
© 2007 Cambridge University Press

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