Femtosecond-Pulsed Plasmonic Nanotweezers
We demonstrate for the first time plasmonic nanotweezers based on Au bowtie nanoantenna arrays (BNAs) that utilize a femtosecond-pulsed input source to enhance trapping of both Rayleigh and Mie particles. Using ultra-low input power densities, we demonstrate that the high-peak powers associated with...
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| Format: | Online |
| Language: | English |
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Nature Publishing Group
2012
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3443815/ |
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pubmed-3443815 |
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pubmed-34438152012-09-19 Femtosecond-Pulsed Plasmonic Nanotweezers Roxworthy, Brian J. Toussaint, Kimani C. Article We demonstrate for the first time plasmonic nanotweezers based on Au bowtie nanoantenna arrays (BNAs) that utilize a femtosecond-pulsed input source to enhance trapping of both Rayleigh and Mie particles. Using ultra-low input power densities, we demonstrate that the high-peak powers associated with a femtosecond source augment the trap stiffness to 2x that of nanotweezers employing a continuous-wave source, and 5x that of conventional tweezers using a femtosecond source. We show that for trapped fluorescent microparticles the two-photon response is enhanced by 2x in comparison to the response without nanoantennas. We also demonstrate tweezing of 80-nm diameter Ag nanoparticles, and observe an enhancement of the second-harmonic signal of ~3.5x for the combined nanoparticle-BNA system compared to the bare BNAs. Finally, under select illumination conditions, fusing of Ag nanoparticles to the BNAs is observed which holds potential for in situ fabrication of three-dimensional, bimetallic nanoantennas. Nature Publishing Group 2012-09-17 /pmc/articles/PMC3443815/ /pubmed/22993686 http://dx.doi.org/10.1038/srep00660 Text en Copyright © 2012, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
| repository_type |
Open Access Journal |
| institution_category |
Foreign Institution |
| institution |
US National Center for Biotechnology Information |
| building |
NCBI PubMed |
| collection |
Online Access |
| language |
English |
| format |
Online |
| author |
Roxworthy, Brian J. Toussaint, Kimani C. |
| spellingShingle |
Roxworthy, Brian J. Toussaint, Kimani C. Femtosecond-Pulsed Plasmonic Nanotweezers |
| author_facet |
Roxworthy, Brian J. Toussaint, Kimani C. |
| author_sort |
Roxworthy, Brian J. |
| title |
Femtosecond-Pulsed Plasmonic Nanotweezers |
| title_short |
Femtosecond-Pulsed Plasmonic Nanotweezers |
| title_full |
Femtosecond-Pulsed Plasmonic Nanotweezers |
| title_fullStr |
Femtosecond-Pulsed Plasmonic Nanotweezers |
| title_full_unstemmed |
Femtosecond-Pulsed Plasmonic Nanotweezers |
| title_sort |
femtosecond-pulsed plasmonic nanotweezers |
| description |
We demonstrate for the first time plasmonic nanotweezers based on Au bowtie nanoantenna arrays (BNAs) that utilize a femtosecond-pulsed input source to enhance trapping of both Rayleigh and Mie particles. Using ultra-low input power densities, we demonstrate that the high-peak powers associated with a femtosecond source augment the trap stiffness to 2x that of nanotweezers employing a continuous-wave source, and 5x that of conventional tweezers using a femtosecond source. We show that for trapped fluorescent microparticles the two-photon response is enhanced by 2x in comparison to the response without nanoantennas. We also demonstrate tweezing of 80-nm diameter Ag nanoparticles, and observe an enhancement of the second-harmonic signal of ~3.5x for the combined nanoparticle-BNA system compared to the bare BNAs. Finally, under select illumination conditions, fusing of Ag nanoparticles to the BNAs is observed which holds potential for in situ fabrication of three-dimensional, bimetallic nanoantennas. |
| publisher |
Nature Publishing Group |
| publishDate |
2012 |
| url |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3443815/ |
| _version_ |
1611909276037545984 |