https://doi.org/10.1140/epjd/e2015-60108-6
Regular Article
Wiggler magnetic field assisted second harmonic generation in clusters
1 Department of Physics,
Lyallpur Khalsa College of
Engineering, 144001
Jalandhar,
India
2 Department of Applied Sciences, DAV
Institute of Engineering &
Technology, 144008
Jalandhar,
India
3 Research Scholar Punjab Technical
University, 144601
Kapurthala,
India
4 Department of Physics, Lovely
Professional University, 144411
Phagwara,
India
a
e-mail: svij25@yahoo.co.in
Received:
18
February
2015
Received in final form:
7
May
2015
Published online:
9
June
2015
Wiggler magnetic field assisted second harmonic generation in clusters has been investigated theoretically. An intense short-pulse laser propagating through a gas embedded with atomic clusters, converts it into hot plasma balls. For clusters with radius less than one tenth of the laser wavelength, the nonlinear restoration force dominates, which leads to second harmonic generation. The magnetic wiggler provides the uncompensated momentum to second harmonic photon, to make the process of harmonic generation resonant. We explore the impact of laser intensity and cluster size on the efficiency of second harmonic generation. Pulse slippage of second harmonic pulse out of the domain of fundamental laser pulse has been observed on account of group velocity mismatch between the fundamental and second harmonic pulse. Enhancement in the efficiency of the second harmonic is seen for the optimum values of wiggler magnetic field.
Key words: Plasma Physics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2015