Characterization of polarization gating parameters for attosecond pulse generation using an imaging polarimeter

Isolated attosecond pulses can be generated by the polarization gating method, for which the gating time window and the polarization direction are key parameters. In this work, we propose methods to characterize these parameters with an imaging polarimeter based on the division of the focal plane in a single-shot manner. The gating time window and the polarization direction can be characterized using the degree of linear polarization and the angle of linear polarization, respectively. Spatially resolved evaluation of gating parameters is important for generating high-intensity isolated attosecond pulses. The robust generation of isolated attosecond pulses by evaluating the gating parameters with the proposed method will enable us to perform the attosecond-pump and attosecond-probe of electron dynamics in atoms and molecules.