The functionality of attosecond nonlinear optics that provide coherent x-rays sources, is discussed. Hard-x-ray lasers, with wavelengths shorter than 1 nm can be generated using free-electron lasers. Coherent x-ray source at very short wavelength such as the hard-x-ray region of the spectrum, has the capability to manipulate electron dynamics on attosecond time scales. As total phase accumulated by the electron during the attosecond-time scale trajectory is of the order of one radian of phase per harmonic order, the high-energy photon is emitted in the recollosion event and the phase of the emitted x-ray is shifted with respect to the phase of the driving laser. This phase helps to manipulate electron dynamics on attosecond time scales. Nonlinear optics has also been applied in extreme-UV and soft-x-ray regions of the spectrum, including nanoimaging, materials dynamics, and new ultrasensitive attosecond x-ray spectroscopy and radiation chemistry.
|Number of pages||5|
|Specialist publication||Laser Focus World|
|State||Published - May 2007|