Single-beam trapping using laser beams focused by low and high numerical apertures: angular spectrum approach

Šiler, Martin; Brzobohatý, Oto; Jákl, Petr; Karásek, Vítězslav; Zemánek, Pavel

doi:https://dx.doi.org/10.1117/12.2039094

Number of the records: 1

Single-beam trapping using laser beams focused by low and high numerical apertures: angular spectrum approach

1.

SYSNO ASEP	0434439
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Single-beam trapping using laser beams focused by low and high numerical apertures: angular spectrum approach
Author(s)	Šiler, Martin (UPT-D)_{RID, ORCID, SAI} Brzobohatý, Oto (UPT-D)_{RID, ORCID, SAI} Jákl, Petr (UPT-D)_{RID, ORCID, SAI} Karásek, Vítězslav (UPT-D)_{RID, SAI} Zemánek, Pavel (UPT-D)_{RID, SAI, ORCID}
Number of authors	5
Source Title	Complex Light and Optical Forces VIII. (Proceedings of SPIE 8999). - Bellingham : SPIE, 2014 - ISSN 0277-786X - ISBN 9780819499127
Pages	899904:1-8
Number of pages	8 s.
Publication form	Print - P
Action	Complex Light and Optical Forces /8./
Event date	04.02.2014-06.02.2014
VEvent location	San Francisco
Country	US - United States
Event type	WRD
Language	eng - English
Country	US - United States
Keywords	optical tweezers ; optical force calculation ; focused beam ; angular spectrum ; multiple trapping locations
Subject RIV	BH - Optics, Masers, Lasers
R&D Projects	GPP205/12/P868 GA ČR - Czech Science Foundation (CSF)
	ED0017/01/01 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	EE2.4.31.0016 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LO1212 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UPT-D - RVO:68081731
UT WOS	000338075400001
EID SCOPUS	84901614499
DOI	10.1117/12.2039094
Annotation	Single beam optical tweezers hold particles behind the focal plane due to the highly focused laser beam. However, even moderately focused beams may stably confine particles of high refractive index contrast and sizes up to half wavelength. This is caused by the fact that the light structure near focus is complex even for such moderately focused beams. The intensity profile consists of several axial oscillations as well as off-axis lobes or rings which enhance trapping. Moreover, side lobes provide another multiple trapping sites for small sized particles. The properties of these traps will be analyzed theoretically by means of Generalized Lorenz-Mie Scattering theory.
Workplace	Institute of Scientific Instruments
Contact	Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178
Year of Publishing	2015

Number of the records: 1