Realization of Lasing Emission from One Step Fabricated WSe(2) Quantum Dots

Two-dimensional (2D) transition-metal dichalcogenides (TMDCs) quantum dots (QDs) are the vanguard due to their unique properties. In this work, WSe(2) QDs were fabricated via one step ultrasonic probe sonication. Excitation wavelength dependent photoluminescence (PL) is observed from WSe(2) QDs. Roo...

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Detalles Bibliográficos
Autores principales: Ren, Pengpeng, Zhang, Wenfei, Ni, Yiqun, Xiao, Di, Wan, Honghao, Peng, Ya-Pei, Li, Ling, Yan, Peiguang, Ruan, Shuangchen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6070907/
https://www.ncbi.nlm.nih.gov/pubmed/30018255
http://dx.doi.org/10.3390/nano8070538
Descripción
Sumario:Two-dimensional (2D) transition-metal dichalcogenides (TMDCs) quantum dots (QDs) are the vanguard due to their unique properties. In this work, WSe(2) QDs were fabricated via one step ultrasonic probe sonication. Excitation wavelength dependent photoluminescence (PL) is observed from WSe(2) QDs. Room-temperature lasing emission which benefits from 3.7 times enhancement of PL intensity by thermal treatment at ~470 nm was achieved with an excitation threshold value of ~3.5 kW/cm(2) in a Fabry–Perot laser cavity. To the best of our knowledge, this is the first demonstration of lasing emission from TMDCs QDs. This indicates that TMDCs QDs are a superior candidate as a new type of laser gain medium.

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