Single quantum path control by a fundamental chirped pulse combined with a subharmonic control pulse

► HHG spectra and attosecond pulse generation from a model He atom. ► Two-color laser field of a chirped fundamental pulse and a subharmonics control pulse. ► Single quantum path selection by β = 4.55 chirp pulse and the zero-phase 2000 nm control pulse. ► Formation of 337 eV supercontinuum region and generation of 39 as pulse.