Realization of Lasing Emission from One Step Fabricated WSe2 Quantum Dots

Nanomaterials

Peiguang Yan¹  Shuangchen Ruan¹  Wenfei Zhang¹  Ling Li¹  Pengpeng Ren¹  Di Xiao¹  Ya-Pei Peng¹  Honghao Wan¹  Yiqun Ni¹ 

[1] Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China;

关键词: WSe2 quantum dots;    Laser;    Two-dimensional transition-metal dichalcogenides;    photoluminenscence;   

DOI  :  10.3390/nano8070538

来源: DOAJ

【 摘 要 】

Two-dimensional (2D) transition-metal dichalcogenides (TMDCs) quantum dots (QDs) are the vanguard due to their unique properties. In this work, WSe2 QDs were fabricated via one step ultrasonic probe sonication. Excitation wavelength dependent photoluminescence (PL) is observed from WSe2 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/cm2 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.

【 授权许可】

Unknown