Optically Pumped Monolayer MoSe2 Excitonic Lasers from Whispering Gallery Mode Microcavities.
Xinpeng FuXihong FuYongyi ChenLi QinHangyu PengRuixin ShiFangfei LiQiang ZhouYubing WangYinli ZhouYongqiang NingPublished in: The journal of physical chemistry letters (2020)
Developing integrable, nanoscale, and low-energy-consumption lasers is a crucial step toward on-chip optical communications and computing technologies. The strong exciton-photon interaction that emerged in monolayer transition metal dichalcogenides (TMDs) holds promise for engineering and integration. Herein, we prepare the MoSe2/microsphere cavities excitonic lasers by placing SiO2 microspheres on top of a monolayer MoSe2 film. By virtue of continuous-wave exciting MoSe2/microsphere whispering gallery mode (WGM) cavities, we realize multiple excitonic WGM lasing in the emission wavelength range of ∼750-875 nm at room temperature with tunable properties of free spectral range (FSR) and full width at half-maximum (fwhm) by varying the microsphere size. Theoretical calculations based on the finite element method (FEM) using COMSOL software were utilized to identify lasing modes and reveal the corresponding electric field distribution. These findings help to deepen fundamental understanding of excitonic WGM lasing and provide a promising research platform for integrable, scalable, and low-cost laser devices.
Keyphrases
- room temperature
- low cost
- transition metal
- finite element
- high throughput
- ionic liquid
- high speed
- optical coherence tomography
- molecular dynamics
- high resolution
- single cell
- gene expression
- density functional theory
- atomic force microscopy
- photodynamic therapy
- living cells
- computed tomography
- energy transfer
- reduced graphene oxide
- molecularly imprinted
- machine learning
- gold nanoparticles
- simultaneous determination
- single molecule
- magnetic nanoparticles
- electron microscopy