Single Zeptosecond Pulse Generation in the Interaction of Relativistic Laser and Plasma with Unfixed Ions

The creation of single zeptosecond pulses is important in various scientific fields, particularly for studying time-resolved nuclear processes. in this study, a clean single subattosecond (270 zeptosecond) pulse is obtained in the simulation of a femtosecond laser with over dense plasma. first, the desired laser and plasma parameters are utilized to achieve the nanobunches in the plasma surface and the desired spectrum up to 2000th harmonics is obtained. then, different filters such as filtering the harmonics and different intensity filters are applied where, the special exponential function is due to a very clean single zeptosecond pulse.