Anomalous enhancement of a single high-order harmonic by using a laser-ablation tin plume at 47 nm.
We have successfully demonstrated intensity enhancement of a single high-order harmonic at a wavelength of 46.76 nm by using low-ionized tin ions in a laser-ablation plume as the nonlinear medium. The ablation plume was produced by irradiating a solid tin target with a 10 mJ energy picosecond laser pulse. Strong 17th-harmonic generation at a wavelength of 46.76 nm was observed with a conversion efficiency of about 10(-4). We attribute the strong enhancement of the single high-order harmonic to multiphoton resonance with a strong radiative transition of the Sn II ion.
Suzuki
Masayuki
M
Institute for Solid State Physics, University of Tokyo, Chiba, Japan. msuzuki@issp.u-tokyo.ac.jp
Baba
Motoyoshi
M
Ganeev
Rashid
R
Kuroda
Hiroto
H
Ozaki
Tsuneyuki
T