Carrier-envelope-phase dependence of emission properties of high-order harmonic generation

The carrier-envelope-phase (CEP) dependence of the emission properties of high-order harmonic generation (HHG) are quantitatively investigated. Calculation shows that a two-cycle laser with CEP of 15 degrees can produce a single energy distribution pulse peaked at 0.94 radian (rad) and spanned 1.29 rad with the cutoff energy 2.9U(p) + I(p) and a bandwidth 0.86U(p) (where U(p) is the ponderomotive potential of the laser field and I(p) is the atomic ionization potential). The CEP dependence of the energy and temporal localizations of the single distribution pulse show interesting 180 degrees periodic structures. These characteristics may be useful in optimizing attosecond x-ray sources and measurements.Physics, MultidisciplinarySCI(E)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)2ARTICLE62070-20732