Apparatus and method for tunable generation of coherent radiation

摘要

A method and apparatus is disclosed for generating tunable attosecond-scale radiation pulses, with a frequency in range of ultraviolet to soft-X-ray, from a solid-state medium. The invention utilizes an intense laser pulse to drive a high harmonic generation (HHG) process in a solid state medium and a weak secondary field to control the HHG process. The weak secondary field has a frequency equal to the second harmonic of the intense laser pulse. The spatial, temporal and spectral properties of the HHG process and the emitted harmonic beam are tuned by adjusting the relative delay between the two fields and the intensity of the weak secondary field.

主权项

1. A method comprising:
applying a driving electromagnetic field having a first frequency and a first intensity to a solid-state medium to thereby trigger a high harmonic generation process in the solid-state medium, wherein the high harmonic generation process results in a generation of a harmonic beam from the solid-state medium, wherein the harmonic beam comprises a plurality of high-order harmonics of the first frequency; and applying a control field having a second frequency, a second intensity and a relative phase with respect to the driving electromagnetic field to an interaction region of the electromagnetic field and the solid-state medium to thereby control one or more spectral, temporal and spatial properties of the harmonic beam generated from the solid-state medium.