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https://doi.org/10.1038/srep04940
DC Field | Value | |
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dc.title | Laser-induced greenish-blue photoluminescence of mesoporous silicon nanowires | |
dc.contributor.author | Choi, Y.-R. | |
dc.contributor.author | Zheng, M. | |
dc.contributor.author | Bai, F. | |
dc.contributor.author | Liu, J. | |
dc.contributor.author | Tok, E.-S. | |
dc.contributor.author | Huang, Z. | |
dc.contributor.author | Sow, C.-H. | |
dc.date.accessioned | 2014-10-16T09:30:40Z | |
dc.date.available | 2014-10-16T09:30:40Z | |
dc.date.issued | 2014-05-13 | |
dc.identifier.citation | Choi, Y.-R., Zheng, M., Bai, F., Liu, J., Tok, E.-S., Huang, Z., Sow, C.-H. (2014-05-13). Laser-induced greenish-blue photoluminescence of mesoporous silicon nanowires. Scientific Reports 4 : -. ScholarBank@NUS Repository. https://doi.org/10.1038/srep04940 | |
dc.identifier.issn | 20452322 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/97049 | |
dc.description.abstract | Solid silicon nanowires and their luminescent properties have been widely studied, but lesser is known about the optical properties of mesoporous silicon nanowires (mp-SiNWs). In this work, we present a facile method to generate greenish-blue photoluminescence (GB-PL) by fast scanning a focused green laser beam (wavelength of 532 nm) on a close-packed array of mp-SiNWs to carry out photo-induced chemical modification. The threshold of laser power is 5 mW to excite the GB-PL, whose intensity increases with laser power in the range of 5-105 mW. The quenching of GB-PL comes to occur beyond 105 mW. The in-vacuum annealing effectively excites the GB-PL in the pristine mp-SiNWs and enhances the GB-PL of the laser-modified mp-SiNWs. A complex model of the laser-induced surface modification is proposed to account for the laser-power and post-annealing effect. Moreover, the fast scanning of focused laser beam enables us to locally tailor mp-SiNWs en route to a wide variety of micropatterns with different optical functionality, and we demonstrate the feasibility in the application of creating hidden images. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1038/srep04940 | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | PHYSICS | |
dc.description.doi | 10.1038/srep04940 | |
dc.description.sourcetitle | Scientific Reports | |
dc.description.volume | 4 | |
dc.description.page | - | |
dc.identifier.isiut | 000335725100002 | |
Appears in Collections: | Staff Publications |
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