Femtosecond pulse-width dependent trapping and directional ejection dynamics of dielectric nanoparticles

Handle URI:
http://hdl.handle.net/10754/575582
Title:
Femtosecond pulse-width dependent trapping and directional ejection dynamics of dielectric nanoparticles
Authors:
Chiang, Weiyi; Usman, Anwar; Masuhara, Hiroshi
Abstract:
We demonstrate that laser pulse duration, which determines its impulsive peak power, is an effective parameter to control the number of optically trapped dielectric nanoparticles, their ejections along the directions perpendicular to polarization vector, and their migration distances from the trapping site. This ability to controllably confine and eject the nanoparticle is explained by pulse width-dependent optical forces exerted on nanoparticles in the trapping site and ratio between the repulsive and attractive forces. We also show that the directional ejections occur only when the number of nanoparticles confined in the trapping site exceeds a definite threshold. We interpret our data by considering the formation of transient assembly of the optically confined nanoparticles, partial ejection of the assembly, and subsequent filling of the trapping site. The understanding of optical trapping and directional ejections by ultrashort laser pulses paves the way to optically controlled manipulation and sorting of nanoparticles. © 2013 American Chemical Society.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC)
Publisher:
American Chemical Society (ACS)
Journal:
The Journal of Physical Chemistry C
Issue Date:
19-Sep-2013
DOI:
10.1021/jp404372a
Type:
Article
ISSN:
19327447
Sponsors:
The financial supports from the Ministry of Education of Taiwan (MOE-ATU Project; National Chiao Tung University), the National Science Council of Taiwan (Grant No. NSC 100-2113-M-009-001), and Foundation of the Advancement for Outstanding Scholarship of Taiwan to H.M. are gratefully acknowledged.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorChiang, Weiyien
dc.contributor.authorUsman, Anwaren
dc.contributor.authorMasuhara, Hiroshien
dc.date.accessioned2015-08-24T08:33:26Zen
dc.date.available2015-08-24T08:33:26Zen
dc.date.issued2013-09-19en
dc.identifier.issn19327447en
dc.identifier.doi10.1021/jp404372aen
dc.identifier.urihttp://hdl.handle.net/10754/575582en
dc.description.abstractWe demonstrate that laser pulse duration, which determines its impulsive peak power, is an effective parameter to control the number of optically trapped dielectric nanoparticles, their ejections along the directions perpendicular to polarization vector, and their migration distances from the trapping site. This ability to controllably confine and eject the nanoparticle is explained by pulse width-dependent optical forces exerted on nanoparticles in the trapping site and ratio between the repulsive and attractive forces. We also show that the directional ejections occur only when the number of nanoparticles confined in the trapping site exceeds a definite threshold. We interpret our data by considering the formation of transient assembly of the optically confined nanoparticles, partial ejection of the assembly, and subsequent filling of the trapping site. The understanding of optical trapping and directional ejections by ultrashort laser pulses paves the way to optically controlled manipulation and sorting of nanoparticles. © 2013 American Chemical Society.en
dc.description.sponsorshipThe financial supports from the Ministry of Education of Taiwan (MOE-ATU Project; National Chiao Tung University), the National Science Council of Taiwan (Grant No. NSC 100-2113-M-009-001), and Foundation of the Advancement for Outstanding Scholarship of Taiwan to H.M. are gratefully acknowledged.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleFemtosecond pulse-width dependent trapping and directional ejection dynamics of dielectric nanoparticlesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.identifier.journalThe Journal of Physical Chemistry Cen
dc.contributor.institutionDepartment of Applied Chemistry, Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwanen
kaust.authorUsman, Anwaren
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