Journal
NANOMATERIALS
Volume 12, Issue 17, Pages -Publisher
MDPI
DOI: 10.3390/nano12173073
Keywords
MPA upconversion lasing; localized surface plasmons; multiple quantum wells
Categories
Funding
- National Natural Science Foundation of China (NSFC) [11974122]
- Rural Science and Technology Commissioner Project [KTP20210340]
- Scientific and Technological Plan of Guangdong Province, China
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Efficient four-photon absorption upconversion lasing is realized and compared with the third-harmonic generation peak. The upconversion photoluminescence is enhanced by metal-localized surface plasmons. This work provides a potential pathway for the development of short-wavelength lasers.
In the progress of nonlinear optics, multiphoton absorption (MPA) upconversion lasing enables many vital applications in bioimaging, three-dimensional optical data storage, and photodynamic therapy. Here, efficient four-photon absorption upconversion lasing from the ZnO/ZnMgO multiple quantum wells (MQWs) at room temperature is realized. Moreover, the MPA upconversion lasing and third-harmonic generation peak generated in the MQWs under the excitation of a femtosecond (fs) laser pulse were observed concurrently, and the essential differences between each other were studied comprehensively. Compared with the ZnO film, the upconversion lasing peak of the ZnO/ZnMgO MQWs exhibits a clear blue shift. In addition, the four-photon absorption upconversion photoluminescence (PL) intensity was enhanced in the MQWs/Au nanoparticles (NPs) by the metal-localized surface plasmons (LSPs). The work paves the way for short-wavelength lasers by taking advantage of the high stability and large exciton binding energy of the MQWs' structures.
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