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Strain-activated stimulated emission from multilayer MoSe2 in a narrow operation window



Yuankun Lin, Noah Hurley, Steve Kamau, Evan Hathaway, Yan Jiang, Roberto Gonzalez Rodriguez, Sinto Varghese, Sergiy Krylyuk, Albert Davydov, Yuanxi Wang, Anupama Kaul, Jingbiao Cui


Herein, photoluminescence (PL) and fluorescence lifetime imaging (FLIM) in multilayer MoSe2 are studied. Strain-activated stimulated emission via defect levels in multilayer MoSe2 under laser excitation is observed, for the first time in defects of transition metal dichalcogenides. The stimulated emission is indicated by a threshold behavior of PL emission intensity with respect to laser intensity, strong polarization effects, achieved population inversion with a difference in lifetimes of two competing excited states, and localization of the stimulated emission zone as observed in FLIM. The presented results not only demonstrate strain-activated stimulated emission and highlight the necessity of strain engineering in tailoring 2D layered materials for optoelectronic applications, but also shed light on the design of stimulated emission in transition metal dichalcogenide's defects to tailor for potential single-photon emission behavior.
Physica Status Solidi- Rapid Research Letters


Photoluminescence, time-resolved photoluminescence, MoSe2, stimulated emission


Lin, Y. , Hurley, N. , Kamau, S. , Hathaway, E. , Jiang, Y. , Rodriguez, R. , Varghese, S. , Krylyuk, S. , Davydov, A. , Wang, Y. , Kaul, A. and Cui, J. (2023), Strain-activated stimulated emission from multilayer MoSe2 in a narrow operation window, Physica Status Solidi- Rapid Research Letters, [online],, (Accessed April 17, 2024)
Created September 24, 2023, Updated February 26, 2024