Effects of DC Bias on Quantum Pathways Interference in Two-Color Laser Induced Photoemission

In this work, we analyze the quantum pathways interference in two-color photoemission under DC bias using exact analytical solutions of the one-dimensional (1D) time-dependent Schrodinger equation (TDSE). The effects of DC bias and laser fields on the modulation of photoemission are systematically investigated. Increasing DC bias shifts the dominant emission from multiphoton photoemission to photo-assisted field emission and then direct tunneling, which leads to different dominant pathways and interferences. Our study provides insights into two-color photoemission dynamics under DC bias.