Directional Photocurrent Generated by Quantum Interference Control
Abstract
Although the absorption of light in a bulk homogeneous semiconductor produces photocarriers with non-zero momentum, it generally does not produce a current in the absence of an applied electric field because equal amounts of carriers with opposite momentum are injected. The interference of absorption processes, for example, between one-photon and two-photon absorption, can produce a current because constructive interference for carriers with one momentum can correspond to destructive interference for carriers with the opposite momentum. We show that for the interference between two-photon and three-photon absorption, the current has a narrower angular spread, i.e., a ``beam'' of electrons in a specified direction is produced in the semiconductor.
Cite
@article{arxiv.2511.05318,
title = {Directional Photocurrent Generated by Quantum Interference Control},
author = {Yiming Gong and Kai Wang and Steven T. Cundiff},
journal= {arXiv preprint arXiv:2511.05318},
year = {2025}
}