Wide-bandwidth lasing from C-dot/epoxy nanocomposite Fabry–Perot cavities with ultralow threshold

We show that by maximizing the amount of organosilane functional groups, the quantum yield of surface functionalized carbon nanodots (C-dots) dispersed in epoxy can be enhanced to 68% under optical excitation at 450 nm wavelength. This is the highest quantum yield ever recorded for C-dots at such an...

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Published inJournal of materials chemistry. C, Materials for optical and electronic devices Vol. 2; no. 8; pp. 1525 - 1531
Main Authors Zhang, W. F., Jin, L. M., Yu, S. F., Zhu, H., Pan, S. S., Zhao, Y. H., Yang, H. Y.
Format Journal Article
LanguageEnglish
Published 28.02.2014
Subjects
Carbon
Excitation
Fabry-Perot
Holes
Lasing
Nanostructure
Thresholds
Wavelengths
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Summary:We show that by maximizing the amount of organosilane functional groups, the quantum yield of surface functionalized carbon nanodots (C-dots) dispersed in epoxy can be enhanced to 68% under optical excitation at 450 nm wavelength. This is the highest quantum yield ever recorded for C-dots at such an excitation wavelength. Lasing emission can also be demonstrated from a Fabry-Perot cavity by using C-dots as the gain medium. The lasing threshold is found to be similar to 200 W cm super(-2) which is 2 orders of magnitude lower than that provided in the recent reports. Furthermore, tunable single-mode lasing over a bandwidth of similar to 60 nm wide is achieved from the Fabry-Perot cavity in the Littrow configuration.
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ISSN:2050-7526
2050-7534
DOI:10.1039/c3tc32154a