Sonu Sen - Articles

Relativistic ponderomotive self-focusing of a intense laser beam through inhomogeneous plasma with different density ramps
In the present work we make an analytical investigation of nonlinear propagation of intense laser pulse through inhomogeneous plasma with relativistic ponderomotive nonlinearity.A differential equation of the beam width parameter with the distance of propagation is derived including the effects of relativistic self-focusing and ponderomotive self-channeling. Read
By: Sonu Sen | 04/07/2009 | Science

Magnetically induced transparency of circularly polarized laser beam in plasmas
For the intensities greater than 1018 W/cm2, circularly polarized radiation can propagate in electron plasma whose density is greater than the critical density. A strong flow of relativistic electrons, axially co-moving with the pulse arises. At this point the, the magnetic field of the electromagnetic wave becomes important. In the present paper, three regimes of propagation of circularly polarized laser beam in magnetized plasma are identified. Read
By: Sonu Sen | 28/06/2009 | Science