| Title | Single charge control of localized excitons in heterostructures with ferroelectric thin films and two-dimensional transition metal dichalcogenides |
| Authors | Dai, Danjie Wang, Xinyan Yang, Jingnan Dang, Jianchen Yuan, Yu Fu, Bowen Xie, Xin Yang, Longlong Xiao, Shan Shi, Shushu Yan, Sai Zhu, Rui Zuo, Zhanchun Wang, Can Jin, Kuijuan Gong, Qihuang Xu, Xiulai |
| Affiliation | Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100049, Peoples R China Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China Peking Univ, State Key Lab Mesoscop Phys, Sch Phys, Beijing 100871, Peoples R China Peking Univ, Frontiers Sci Ctr Nanooptoelect, Sch Phys, Beijing 100871, Peoples R China Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China |
| Keywords | QUANTUM EMITTERS WSE2 LIGHT |
| Issue Date | Sep-2022 |
| Publisher | NANOSCALE |
| Abstract | Single charge control of localized excitons (LXs) in two-dimensional transition metal dichalcogenides (TMDCs) is crucial for potential applications in quantum information processing and storage. However, traditional electrostatic doping method by applying metallic gates onto TMDCs may cause inhomogeneous charge distribution, optical quenching, and energy loss. Herein, by locally controlling the ferroelectric polarization of the ferroelectric thin film BiFeO3 (BFO) with a scanning probe, we can deterministically manipulate the doping type of monolayer WSe2 to achieve p-type and n-type doping. This nonvolatile approach can maintain the doping type and hold the localized excitonic charges for a long time without applied voltage. Our work demonstrated that the ferroelectric polarization of BFO can control the charges of LXs effectively. Neutral and charged LXs have been observed in different ferroelectric polarization regions, confirmed by magnetic optical measurement. Highly circular polarization degree with 90% photon emission from these quantum emitters was achieved in high magnetic fields. Controlling the single charge of LXs in a non-volatile way shows a great potential for deterministic photon emission with desired charge states for photonic long-term memory. |
| URI | http://hdl.handle.net/20.500.11897/655423 |
| ISSN | 2040-3364 |
| DOI | 10.1039/d2nr04119g |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 人工微结构和介观物理国家重点实验室 |
