Search Swinburne Research Bank
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/30165
 Download PDF (Published version) (Adobe Acrobat PDF, -1 bytes) |
- Title
- Near-field optical trapping with an ultrashort pulsed laser beam
- Author(s)
- Kuriakose, Smitha; Morrish, Dru; Gan, Xiaosong; Chon, James W. M.; Dholakia, K.; Gu, Min
- Abstract
- We report the focused evanescent optical trapping of nonfluorescent and fluorescent dielectric microspheres using a femtosecond laser. The experiment confirms that the trapping efficiency increases with the size of the particles. As a result, a pulsed laser has been used to trap particles in the Mie regime and to excite whispering gallery modes in them. The excitation of whispering gallery modes in a near-field femtosecond trap shows a significant suppression of the two-photon fluorescence background with an improvement of the photon storage factor by 46%, as compared to far-field two-photon excitation.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics
- Source
- Applied Physics Letters, Vol. 92, no. 8 (2008), Article no. 081108
- Publication year
- 2008
- Keyword(s)
- Diaelectric materials; Fluorescence; High-speed optical techniques; Radiation pressure; Two-photon processes; Whispering gallery modes
- Publisher
- American Institute of Physics
- ISSN
- 0003-6951
- Publisher URL
- http://dx.doi.org/10.1063/1.2888771
- Copyright
- Copyright © 2008 American Institute of Physics. Published version of this paper reproduced here in accordance with the copyright policy of the publisher.
- Full text
- Peer reviewed
