Abstract

Macroscopic effects for high-order harmonic generation in the presence of strong terahertz fields are analyzed. The effect of terahertz fields on high-order harmonic generation was first investigated in [1]. Here we further investigate the process using a complete three dimensional non-adiabatic macroscopic model [2], and show that propagation effects are very important when dealing with terahertz fields, and, under certain circumstances even help the generation of single attosecond pulses (SAP).

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