Current Research

Optical Guiding of Ultra High Laser Intensities
The effective interaction length of a focused laser pulse is limited by the vacuum diffraction length: ZL = pd2/l. Optical guiding is necessary in order to propagate a laser pulse over distances larger than the vacuum diffraction length. Applications of optical guiding are laser driven plasma accelerators and X-ray lasers. Plasma is the best guiding medium. It can sustain ultrahigh electric fields. One of the best methods for the guiding of the high intensity laser pulses over distances of several centimeters is a performed plasma channel. (more...)

Interaction of High Intensities with Snow Clusters
Efficient coupling of high intensity laser energy into matter has been long ago the goal of many research groups. The possibility to get an efficient conversion of the laser energy into particles and x-rays is very important to many areas of physics. Snow clusters can increase the conversion efficiency as having local density of solid and have dimensions similar to gas clusters (which exhibit relative high coupling) in one axis and elongated in another dimension. (more...)

Propogation of Ultra High Intensities in the Atmosphere
While propagating through the atmosphere ultrashort highly intense laser beams break up into spatially trapped “light bullets” (filaments) that can propagate many diffraction lengths without diverging. These self-guided beams have many potential applications such as remote-sensing of the atmosphere and lightning control. (more...)

Electron Acceleration by Laser Wakefield

Autoresonant Excitation Of Molocules
The ability to place an atom or a molecule in a specific state is of great importance in spectroscopy and chemical dynamics . Direct excitation of the atom or the molecule with monochromatic radiation that matches the desired energy gap is one way to achieve this goal. However, excitation of highly excited vibrational states in molecules is inefficient, due to the small value of the transition dipole moment between the initial and final states . Another option is to cause a cascaded transition from the initial to the final state through a series of intermediate levels, by a pulse with a continuously variable frequency. Such pulse is said to be chirped. (more...)

Interaction of Ultra High Laser Intensities with Solid Targets