Quantum coherence and interference of a single moir\'e exciton in nano-fabricated twisted semiconductor heterobilayers
Abstract
Moir\'e potential acts as periodic quantum confinement for optically generated exciton, generating spatially ordered zero-dimensional quantum system. However, broad emission spectrum arising from inhomogeneity among moir\'e potential hinders the exploration of the intrinsic properties of moir\'e exciton. In this study, we have demonstrated a new method to realize the optical observation of quantum coherence and interference of a single moir\'e exciton in twisted semiconducting heterobilayer beyond the diffraction limit of light. A significant single and sharp photoluminescence peak from a single moir\'e exciton has been demonstrated after nano-fabrication. We present the longer duration of quantum coherence of a single moir\'e exciton, which reaches beyond 10 ps and the accelerated decoherence process with elevating temperature and excitation power density. Moreover, the quantum interference has revealed the coupling between moir\'e excitons in different moir\'e potential minima. The observed quantum coherence and interference of moir\'e exciton will facilitate potential application toward quantum technologies based on moir\'e quantum systems.
Keywords
Cite
@article{arxiv.2309.02879,
title = {Quantum coherence and interference of a single moir\'e exciton in nano-fabricated twisted semiconductor heterobilayers},
author = {Haonan Wang and Heejun Kim and Duanfei Dong and Keisuke Shinokita and Kenji Watanabe and Takashi Taniguchi and Kazunari Matsuda},
journal= {arXiv preprint arXiv:2309.02879},
year = {2023}
}
Comments
42 pages, 4 figures