Realization of single-photon emitters with high brightness and high stability and excellent monochromaticity

• Main Authors: Chen, Shengyao, Wang, Cong, Cai, Hongbing, Ma, Lijun, Qu, Yusong, Liu, Zhenzhou, Wang, Shu, Zhan, Jingyan, Tan, Qinghai, Sheng, Bowen, Liu, Xinfeng, Wang, Xinqiang, Zhang, Xinzheng, Xu, Jingjun, Gao, Weibo, Liu, Qian
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2024
• Subjects: Physics; Laser direct writing; Monochromaticity
• Online Access: https://hdl.handle.net/10356/177905
• Institution: Nanyang Technological University

Two-dimensional (2D) semiconductor single-photon emitters (SPEs) have great potential in various light quantum technologies owing to their perfect collection efficiency. However, various 2D semiconductor SPEs are difficult to simultaneously fulfill a combination of high brightness, high stability, and excellent monochromaticity, owing to challenges in single-frequency emitting, single-frequency intensity, and emitting stability. Here, we present a feasible strategy that, based on a controllable wrinkling technique, realizes simultaneous high brightness, high stability, and excellent monochromaticity in a monolayer WSe2 nano-bulge SPE array with a designable and controllable local uniform large-strain gradient. The SPEs exhibit exceptional performance in SPE generation probability up to about 70% and possess high single-frequency brightness and excellent emitting stability. Our innovative method represents a powerful approach to generating SPEs in 2D materials through strain engineering.