Strong optical laser fields modify the way x-rays interact with matter. This allows one to use x-rays to gain deeper insight into strong-field processes. As an application, optical lasers may be utilized to control the propagation of x rays through a medium. Another application is the preparation of novel samples for x-ray studies. Gas-phase systems are particularly suitable for illustrating the basic principles underlying combined x-ray and laser interactions. Topics addressed include the impact of spin-orbit interaction on the alignment of atomic ions produced in a strong laser field; electromagnetically induced transparency in the x-ray regime; and laser-induced alignment of molecules. The talk concludes with a brief discussion of opportunities provided by x-ray free-electron lasers.

ANL Physics Division Colloquium Schedule