Open AccessMulticolour laser from a single bandgap-graded CdSSe alloy nanoribbon
Author(s) -
Yize Lu,
Fuxing Gu,
Chao Meng,
Hua Yu,
Yaoguang Ma,
Wei Fang,
Limin Tong
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.022314
Subject(s) - lasing threshold , materials science , optics , wavelength , optoelectronics , laser , band gap , excited state , physics , nuclear physics
Multicolour lasing with wavelength varying from 578 nm to 640 nm is realized from a single bandgap-graded CdSSe alloy nanoribbon, by selecting the excited spot at room temperature. Though reabsorption is a serious problem to achieve lasing at short wavelength, multiple scatters on the nanoribbon form localized cavities, and thus lasing at different wavelengths is realized. By increasing the excitation area, multicolour lasing from the same nanoribbon is also observed simultaneously.