Coherently driven semiconductor quantum dots are one of the most promising platforms for non-classical light sources and quantum logic gates which form the foundation of photonic quantum technologies. However, to date, coherent manipulation of single charge carriers in quantum dots is limited mainly to their lowest orbital states. Ultrafast coherent control of high-orbital states is obstructed by the demand for tunable terahertz pulses. To break this constraint, we demonstrate an all-optical method to control high-orbital states of a hole via stimulated Auger process. The coherent nature of the Auger process is proved by Rabi oscillation and Ramsey interference. Harnessing this coherence further enables the investigation of single-hole relaxation mechanism. A hole relaxation time of 161 ps is observed and attributed to the phonon bottleneck effect. Our work opens new possibilities for understanding the fundamental properties of high-orbital states in quantum emitters and developing new types of orbital-based quantum photonic devices.
@article{arxiv.2212.10749,
title = {Coherent control of a high-orbital hole in a semiconductor quantum dot},
author = {Jun-Yong Yan and Chen Chen and Xiao-Dong Zhang and Yu-Tong Wang and Hans-Georg Babin and Andreas D. Wieck and Arne Ludwig and Yun Meng and Xiaolong Hu and Huali Duan and Wenchao Chen and Wei Fang and Moritz Cygorek and Xing Lin and Da-Wei Wang and Chao-Yuan Jin and Feng Liu},
journal= {arXiv preprint arXiv:2212.10749},
year = {2023}
}
Comments
Manuscript with 14 pages and 6 figures plus supplementary Information comprising 15 pages and 14 figures. Nature Nanotechnology (24 July 2023)