Abstract
ZnO is known as one of the best materials for the implementation of the random lasing effect, associated with mirror-less laser emission in a simultaneously amplifying and highly scattering medium. Normally, the fabrication of this medium requires a rather complicated procedure of deposition and thermal treatment of ZnO-based films on some specific substrates, yielding wurtzite-orientation ZnO nanocrystals. We demonstrate a rapid synthesis of highly efficient ZnO-based random lasing spots on a piece of Zn by employing the phenomenon of laser-induced air breakdown. Being ignited near the surface of a Zn target, plasma of the air breakdown serves as a local reactor to locally transform its properties and thus form a film of well-packed 20–40 nm ZnO nanospheres. Exhibiting extremely high amplification and scattering, this medium is capable of generating the random lasing effect within the exciton-based photoluminescent band.
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Kabashin, A.V., Marine, W. & Meunier, M. Laser-assisted local patterning of ZnO-based spots for mirror-less lasing. Appl. Phys. A 93, 1011–1014 (2008). https://doi.org/10.1007/s00339-008-4786-6
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DOI: https://doi.org/10.1007/s00339-008-4786-6