Ultralarge anti-Stokes lasing through tandem upconversion
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 | 1032 |
Journal / Publication | Nature Communications |
Volume | 13 |
Online published | 24 Feb 2022 |
Publication status | Published - 2022 |
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DOI | DOI |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85125295340&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(18ec3827-0f20-4ad5-becf-13641b1bf855).html |
Abstract
Coherent ultraviolet light is important for applications in environmental and life sciences. However, direct ultraviolet lasing is constrained by the fabrication challenge and operation cost. Herein, we present a strategy for the indirect generation of deep-ultraviolet lasing through a tandem upconversion process. A core–shell–shell nanoparticle is developed to achieve deep-ultraviolet emission at 290 nm by excitation in the telecommunication wavelength range at 1550 nm. The ultralarge anti-Stokes shift of 1260 nm (~3.5 eV) stems from a tandem combination of distinct upconversion processes that are integrated into separate layers of the core–shell–shell structure. By incorporating the core–shell–shell nanoparticles as gain media into a toroid microcavity, single-mode lasing at 289.2 nm is realized by pumping at 1550 nm. As various optical components are readily available in the mature telecommunication industry, our findings provide a viable solution for constructing miniaturized short-wavelength lasers that are suitable for device applications.
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Ultralarge anti-Stokes lasing through tandem upconversion. / Sun, Tianying; Chen, Bing; Guo, Yang et al.
In: Nature Communications, Vol. 13, 1032, 2022.
In: Nature Communications, Vol. 13, 1032, 2022.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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