  Terahertz (THz) radiation by beating of two laser beams in a groove density
and magnetized hot plasma is discussed theoretically. In this mechanism, the
ponderomotive force leads to a nonlinear oscillatory current that resonantly
excites THz radiation at the frequency upper hybrid. It is interesting to find
that the maximum THz radiation in the various electron temperature, therefore,
exited an optimum temperature for the parameters such as beating frequency,
transverse distance from lasers beam center and strength of the static magnetic
field that THz radiation can be maximized.
