Electron-positron Pair Creation by Counterpropagating Laser Pulses: Role of Carrier Envelope phase

TL;DR

This paper investigates how the carrier envelope phase influences the spatial and temporal distribution of electron-positron pairs generated by ultraintense counterpropagating laser pulses, revealing polarization-dependent effects.

Contribution

It provides new insights into the role of CEP in pair creation, highlighting polarization effects on the distribution of generated particles.

Findings

Temporal distribution sensitive to CEP for linear polarization

Insensitive to CEP for circular polarization

Highlights polarization-dependent pair creation dynamics

Abstract

The effect of carrier envelope phase (CEP) on the spatio-temporal distribution of the electron-positron pairs created by untraintense counterpropagating femtosecond laser pulses is studied. When the laser pulses are linearly polarized, the temporal distribution of the pairs is found to be sensitive to CEP. On the hand, it is found to be largely insensitive to CEP for circularly polarized pulses.