Microsphere whispering-gallery-mode laser using HgTe quantum dots
Date
2004-12-20Author
Shopova, S. I.
Farca, G.
Rosenberger, A. T.
Wickramanayake, W. M. S.
Kotov, N. A.
Metadata
Show full item recordAbstract
Ultralow-threshold continuous-wave lasing is achieved at room temperature in a fused-silica microsphere that is coated with HgTe quantum dots (colloidal nanoparticles). The 830nm pump input and HgTe microlaser output are efficiently coupled into and out of whispering-gallery modes by tapered fibers. Lasing occurs at wavelengths ranging from 1240 to 1780nm, depending on the size and composition of the quantum dots (HgCdTe is also used). A linear fit to the data determines the lowest observed threshold pump power to be 0+/=2uW.
Citation
Shopova, S. I., Farca, G., Rosenberger, A. T., Wickramanayake, W. M. S., & Kotov, N. A. (2004). Microsphere whispering-gallery-mode laser using HgTe quantum dots. Applied Physics Letters, 85(25), 6101-6103. https://doi.org/10.1063/1.1841459