Coherent control of high-harmonic generation using waveform-synthesized chirped laser fields

We show that wave form-synthesized chirped laser fields are efficient tools for coherent harmonic control. A single harmonic order, or two harmonic orders, can be selectively enhanced by using a two-color field allowing a moderate linear chirp for each color. Different harmonic orders within a wide spectral range can be selectively enhanced by adjusting the laser parameters. Our theory bridges two current harmonic control techniques, namely, single color phase shaping and multicolor amplitude synthesis, and opens the door to new harmonic control possibilities.