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Title: | Confining energy migration in upconversion nanoparticles towards deep ultraviolet lasing | Authors: | Chen, X Jin, L Kong, W Sun, T Zhang, W Liu, X Fan, J Yu, SF Wang, F |
Issue Date: | 2016 | Source: | Nature communications, 2016, v. 7, 10304 | Abstract: | Manipulating particle size is a powerful means of creating unprecedented optical properties in metals and semiconductors. Here we report an insulator system composed of NaYbF 4:Tm in which size effect can be harnessed to enhance multiphoton upconversion. Our mechanistic investigations suggest that the phenomenon stems from spatial confinement of energy migration in nanosized structures. We show that confining energy migration constitutes a general and versatile strategy to manipulating multiphoton upconversion, demonstrating an efficient five-photon upconversion emission of Tm 3+ in a stoichiometric Yb lattice without suffering from concentration quenching. The high emission intensity is unambiguously substantiated by realizing room-temperature lasing emission at around 311 nm after 980-nm pumping, recording an optical gain two orders of magnitude larger than that of a conventional Yb/Tm-based system operating at 650 nm. Our findings thus highlight the viability of realizing diode-pumped lasing in deep ultraviolet regime for various practical applications. | Publisher: | Nature Publishing Group | Journal: | Nature communications | EISSN: | 2041-1723 | DOI: | 10.1038/ncomms10304 | Rights: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ The following publication Chen, X., Jin, L., Kong, W. et al. Confining energy migration in upconversion nanoparticles towards deep ultraviolet lasing. Nat Commun 7, 10304 (2016), 1-6 is availabe at https://dx.doi.org/10.1038/ncomms10304 |
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