標題: | Surface plasmon resonance effect on laser trapping and swarming of gold nanoparticles a an interface |
作者: | Huang, Chih-Hao Kudo, Tetsuhiro Bresoli-Obach, Roger Hofkens, Johan Sugiyama, Teruki Masuhara, Hiroshi 交大名義發表 應用化學系 National Chiao Tung University Department of Applied Chemistry |
公開日期: | 14-九月-2020 |
摘要: | Laser trapping at an interface is a unique platform for aligning and assembling nanomaterials outside the focal spot. In our previous studies, Au nanoparticles form a dynamically evolved assembly outside the focus, leading to the formation of an antenna-like structure with their fluctuating swarms. Herein, we unravel the role of surface plasmon resonance on the swarming phenomena by tuning the trapping laser wavelength concerning the dipole mode for Au nanoparticles of different sizes. We clearly show that the swarm is formed when the laser wavelength is near to the resonance peak of the dipole mode together with an increase in the swarming area. The interpretation is well supported by the scattering spectra and the spatial light scattering profiles from single nanoparticle simulations. These findings indicate that whether the first trapped particle is resonant with trapping laser or not essentially determines the evolution of the swarming. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
URI: | http://dx.doi.org/10.1364/OE.401158 http://hdl.handle.net/11536/155387 |
ISSN: | 1094-4087 |
DOI: | 10.1364/OE.401158 |
期刊: | OPTICS EXPRESS |
Volume: | 28 |
Issue: | 19 |
起始頁: | 27727 |
結束頁: | 27735 |
顯示於類別: | 期刊論文 |