  Lower hybrid (LH) and magneto-sonic (MS) waves are well known modes of
magnetized plasma. These modes play important roles in many phenomena. The
lower hybrid wave is often employed in magnetic confinement fusion experiments
for current drive and heating purposes. Both LH and MS waves are observed in
various astrophysical and space plasma observations. These waves involve ion
motion and have not therefore been considered in high power pulsed laser
experiments. This paper shows, with the help of Particle - In - Cell (PIC)
simulations, a simple mechanism for excitation of lower hybrid and magnetosonic
excitations in the context of laser plasma interaction. A detailed study
characterising the formation and propagation of these modes have been provided.
The scheme for generating these perturbations relies on the application of a
strong magnetic field in the plasma to constrain the motion of lighter electron
species in the laser electric field. The magnetic field strength is chosen so
as to leave the heavier ions un-magnetized at the laser frequency. This helps
in the excitation of the LH waves. On the other hand at the slower time scale
associated with the laser pulse duration, even the ions show a magnetized
response and magnetosonic excitations are observed to get excited.
