Research paperExperimental CharacterizationOptical Control of Fluorescence Spatial Hole Burning Effect in Monolayer WS₂Yichun Pan, Liqing Zhu, Zheng Wang, Weihang Zhou2025·10.48550/arxiv.2506.15287·arXiv:2506.15287AbstractWe report observation and optical control of fluorescence spatial hole burning in monolayer WS2. The pronounced exciton-exciton annihilation process, together with efficient hole capture by intrinsic sulfur vacancy defects, induces photo-doping and leads to fluorescence spatial hole burning. Dual-beam pumping fluorescence imaging reveals a double-exponential recovery process: a fast process from release of trapped holes under probe-beam illumination and a slow process from re-adsorption of electronegative gas molecules. The work demonstrates ultralong-term hole storage and full optical control of release and recovery in monolayer WS2.Read more
Bare monolayer WS₂ flakes mechanically exfoliated from WS₂ single crystals and transferred onto clean SiO₂ substrate.1 preparation2 characterizations6 properties2 figuresExperimentalWS₂Studied MaterialSiO₂Substrate / DielectricExpand
Monolayer WS₂ flakes on clean SiO₂ substrate with a portion covered by thin hexagonal boron nitride for control experiments.1 preparation2 characterizations6 properties2 figuresExperimentalhBNStudied MaterialWS₂Studied MaterialSiO₂Substrate / DielectricExpand
Research paperExperimental CharacterizationOptical Control of Fluorescence Spatial Hole Burning Effect in Monolayer WS₂Yichun Pan, Liqing Zhu, Zheng Wang, Weihang Zhou2025·10.48550/arxiv.2506.15287·arXiv:2506.15287AbstractWe report observation and optical control of fluorescence spatial hole burning in monolayer WS2. The pronounced exciton-exciton annihilation process, together with efficient hole capture by intrinsic sulfur vacancy defects, induces photo-doping and leads to fluorescence spatial hole burning. Dual-beam pumping fluorescence imaging reveals a double-exponential recovery process: a fast process from release of trapped holes under probe-beam illumination and a slow process from re-adsorption of electronegative gas molecules. The work demonstrates ultralong-term hole storage and full optical control of release and recovery in monolayer WS2.Read more
Bare monolayer WS₂ flakes mechanically exfoliated from WS₂ single crystals and transferred onto clean SiO₂ substrate.1 preparation2 characterizations6 properties2 figuresExperimentalWS₂Studied MaterialSiO₂Substrate / DielectricExpand
Monolayer WS₂ flakes on clean SiO₂ substrate with a portion covered by thin hexagonal boron nitride for control experiments.1 preparation2 characterizations6 properties2 figuresExperimentalhBNStudied MaterialWS₂Studied MaterialSiO₂Substrate / DielectricExpand
Research paperExperimental CharacterizationOptical Control of Fluorescence Spatial Hole Burning Effect in Monolayer WS₂Yichun Pan, Liqing Zhu, Zheng Wang, Weihang Zhou2025·10.48550/arxiv.2506.15287·arXiv:2506.15287AbstractWe report observation and optical control of fluorescence spatial hole burning in monolayer WS2. The pronounced exciton-exciton annihilation process, together with efficient hole capture by intrinsic sulfur vacancy defects, induces photo-doping and leads to fluorescence spatial hole burning. Dual-beam pumping fluorescence imaging reveals a double-exponential recovery process: a fast process from release of trapped holes under probe-beam illumination and a slow process from re-adsorption of electronegative gas molecules. The work demonstrates ultralong-term hole storage and full optical control of release and recovery in monolayer WS2.Read more
Bare monolayer WS₂ flakes mechanically exfoliated from WS₂ single crystals and transferred onto clean SiO₂ substrate.1 preparation2 characterizations6 properties2 figuresExperimentalWS₂Studied MaterialSiO₂Substrate / DielectricExpand
Monolayer WS₂ flakes on clean SiO₂ substrate with a portion covered by thin hexagonal boron nitride for control experiments.1 preparation2 characterizations6 properties2 figuresExperimentalhBNStudied MaterialWS₂Studied MaterialSiO₂Substrate / DielectricExpand
Research paperExperimental CharacterizationOptical Control of Fluorescence Spatial Hole Burning Effect in Monolayer WS₂Yichun Pan, Liqing Zhu, Zheng Wang, Weihang Zhou2025·10.48550/arxiv.2506.15287·arXiv:2506.15287AbstractWe report observation and optical control of fluorescence spatial hole burning in monolayer WS2. The pronounced exciton-exciton annihilation process, together with efficient hole capture by intrinsic sulfur vacancy defects, induces photo-doping and leads to fluorescence spatial hole burning. Dual-beam pumping fluorescence imaging reveals a double-exponential recovery process: a fast process from release of trapped holes under probe-beam illumination and a slow process from re-adsorption of electronegative gas molecules. The work demonstrates ultralong-term hole storage and full optical control of release and recovery in monolayer WS2.Read more
Bare monolayer WS₂ flakes mechanically exfoliated from WS₂ single crystals and transferred onto clean SiO₂ substrate.1 preparation2 characterizations6 properties2 figuresExperimentalWS₂Studied MaterialSiO₂Substrate / DielectricExpand
Monolayer WS₂ flakes on clean SiO₂ substrate with a portion covered by thin hexagonal boron nitride for control experiments.1 preparation2 characterizations6 properties2 figuresExperimentalhBNStudied MaterialWS₂Studied MaterialSiO₂Substrate / DielectricExpand
