Near-field optical trapping with an ultrashort pulsed laser beam

Smitha Kuriakose, Dru Morrish, Xiaosong Gan, James W.M. Chon, Kishan Dholakia, Min Gu

Research output: Contribution to journalArticle

7 Citations (Scopus)

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.

Original languageEnglish
Article number081108
JournalApplied Physics Letters
Volume92
Issue number8
DOIs
Publication statusPublished - 2008 Mar 6

Fingerprint

ultrashort pulsed lasers
near fields
whispering gallery modes
trapping
laser beams
photons
traps
excitation
far fields
pulsed lasers
retarding
fluorescence
lasers

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Kuriakose, S., Morrish, D., Gan, X., Chon, J. W. M., Dholakia, K., & Gu, M. (2008). Near-field optical trapping with an ultrashort pulsed laser beam. Applied Physics Letters, 92(8), [081108]. https://doi.org/10.1063/1.2888771
Kuriakose, Smitha ; Morrish, Dru ; Gan, Xiaosong ; Chon, James W.M. ; Dholakia, Kishan ; Gu, Min. / Near-field optical trapping with an ultrashort pulsed laser beam. In: Applied Physics Letters. 2008 ; Vol. 92, No. 8.
@article{c24047244bd64c678480516b699746c8,
title = "Near-field optical trapping with an ultrashort pulsed laser beam",
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.",
author = "Smitha Kuriakose and Dru Morrish and Xiaosong Gan and Chon, {James W.M.} and Kishan Dholakia and Min Gu",
year = "2008",
month = "3",
day = "6",
doi = "10.1063/1.2888771",
language = "English",
volume = "92",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "8",

}

Near-field optical trapping with an ultrashort pulsed laser beam. / Kuriakose, Smitha; Morrish, Dru; Gan, Xiaosong; Chon, James W.M.; Dholakia, Kishan; Gu, Min.

In: Applied Physics Letters, Vol. 92, No. 8, 081108, 06.03.2008.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Near-field optical trapping with an ultrashort pulsed laser beam

AU - Kuriakose, Smitha

AU - Morrish, Dru

AU - Gan, Xiaosong

AU - Chon, James W.M.

AU - Dholakia, Kishan

AU - Gu, Min

PY - 2008/3/6

Y1 - 2008/3/6

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=40049084016&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=40049084016&partnerID=8YFLogxK

U2 - 10.1063/1.2888771

DO - 10.1063/1.2888771

M3 - Article

AN - SCOPUS:40049084016

VL - 92

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 8

M1 - 081108

ER -