Confining energy migration in upconversion nanoparticles towards deep ultraviolet lasing
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Original language | English |
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Article number | 10304 |
Journal / Publication | Nature Communications |
Volume | 7 |
Online published | 7 Jan 2016 |
Publication status | Published - 2016 |
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DOI | DOI |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-84954152523&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(1146630c-5857-4a4e-8d66-3cd4c0d2653f).html |
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 NaYbF4: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 Tm3+ 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.
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Citation Format(s)
Confining energy migration in upconversion nanoparticles towards deep ultraviolet lasing. / Chen, Xian; Jin, Limin; Kong, Wei et al.
In: Nature Communications, Vol. 7, 10304, 2016.
In: Nature Communications, Vol. 7, 10304, 2016.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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