)2008,2009,2010,2011 ( ‫أنموذج ( ب ) الخاص بالبحوث لألعوام‬
University of Baghdad
College Name
Institute of laser for postgraduate studies
Department
Industrial and engineering applications
Full Name as written
in Passport
Abdul Hadi Al-Janabi
e-mail
Hadi.janabi@ilps.uobaghdad.edu.iq
Career
Assistant Lecturer
Research Title
Lecturer
Assistant Professor
Professor
Terahertz Wave Generation by Beating of Two Plane wave laser beams in
Relativistic Plasma.
Shared or Single
Shared name
Published Journal title
Rabeaa K. Nafil, Monika Singh and R. P.
Sharma
Submitted to Applied physics D
Volume Number
communicated
Single
Page
Year
2012
Abstract
Resonant excitation of terahertz (THz) radiation by beating of two plane wave
laser beams in unmagnetized, periodic density modulated plasma is proposed.
The high laser fields increase the velocity of plasma electrons close to the
velocity of light due to which the mass of plasma electrons is increased by the
relativistic factor γ. The resultant relativistic nonlinear velocity of electrons
couples with the density ripple to produce a nonlinear current driving the THz
radiation. The role of electromagnetic density ripple is to provide phase
matching. A simple theoretical model for the THz electric field generation has
been proposed which suggests that the present scheme may yield THz radiations
with efficiency ~ 10 -3 using laser power less than 1015 watt/cm2.