Tailoring solid-state single-photon sources with stimulated emissions
Abstract
The coherent interaction of electromagnetic fields with solid-state two-level systems can yield deterministic quantum light sources for photonic quantum technologies. To date, the performance of semiconductor single-photon sources based on three-level systems is limited mainly due to a lack of high photon indistinguishability. Here, we tailor the cavity-enhanced spontaneous emission from a ladder-type three-level system in a single epitaxial quantum dot (QD) through stimulated emission. After populating the biexciton (XX) of the QD through two-photon resonant excitation (TPE), we use another laser pulse to selectively depopulate the XX state into an exciton (X) state with a predefined polarization. The stimulated XX-X emission modifies the X decay dynamics and yields improved polarized single-photon source characteristics such as a source brightness of 0.030(2), a single-photon purity of 0.998(1), and an indistinguishability of 0.926(4). Our method can be readily applied to existing QD single-photon sources and expands the capabilities of three-level systems for advanced quantum photonic functionalities.
Cite
@article{arxiv.2109.09284,
title = {Tailoring solid-state single-photon sources with stimulated emissions},
author = {Yuming Wei and Shunfa Liu and Xueshi Li and Ying Yu and Xiangbin Su and Shulun Li and Shangjun Xiang and Hanqing Liu and Huiming Hao and Haiqiao Ni and Siyuan Yu and Zhichuan Niu and Jake Iles-Smith and Jin Liu and Xuehua Wang},
journal= {arXiv preprint arXiv:2109.09284},
year = {2022}
}
Comments
NN to appear, comments are welcome