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All-optical dynamic tuning of local excitonic emission of monolayer MoS~2~ by integration with Ge~2~Sb~2~Te~5~ by Hao Ouyang; Haitao Chen; Yuxiang Tang; Jun Zhang; Chenxi Zhang; Bin Zhang; Xiang’ai Cheng; Tian Jiang is a Engineering article available to read on EtoBox.
What is All-optical dynamic tuning of local excitonic emission of monolayer MoS~2~ by integration with Ge~2~Sb~2~Te~5~ about?
Strong quantum confinement and coulomb interactions induce tightly bound quasiparticles such as excitons and trions in an atomically thin layer of transitional metal dichalcogenides (TMDs), which play a dominant role in determining their intriguing optoelectronic properties. Thus, controlling the excitonic properties is essential for the applications of TMD-based devices. Here, we demonstrate the all-optical tuning of the local excitonic emission from a monolayer MoS 2 hybridized with phasechange material Ge 2 Sb 2 Te 5 (GST) thin film. By applying pulsed laser with different power on the MoS 2 /GST heterostructure, the peak energies of the excitonic emission of MoS 2 can be tuned up to 40 meV, and the exciton/ trion intensity ratio can be tuned by at least one order of magnitude. Raman spectra and transient pump-probe measurements show that the tunability originated from the laser-induced phase change of the GST thin film with charge transferring from GST to the monolayer MoS 2 . The dynamic tuning of the excitonic emission was all done with localized laser pulses and could be scaled readily, which pave a new way of controlling the excitonic emission in TMDs. Our findings could be
Who reads All-optical dynamic tuning of local excitonic emission of monolayer MoS~2~ by integration with Ge~2~Sb~2~Te~5~?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Hao Ouyang; Haitao Chen; Yuxiang Tang; Jun Zhang; Chenxi Zhang; Bin Zhang; Xiang’ai Cheng; Tian Jiang
- Publisher
- Walter de Gruyter GmbH
- Published
- 2020
- Language
- EN
- Field
- Engineering (Physical Sciences)