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Optical alignment and confinement of an ellipsoidal nanorod in optical tweezers: a theoretical study

SYSNO ASEP	0384141
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Optical alignment and confinement of an ellipsoidal nanorod in optical tweezers: a theoretical study
Author(s)	Trojek, Jan (UPT-D) Chvátal, Lukáš (UPT-D)_{RID, ORCID, SAI} Zemánek, Pavel (UPT-D)_{RID, SAI, ORCID}
Number of authors	3
Source Title	Journal of the Optical Society of America A, Optics, Image Science and Vision. - : Optical Society of America - ISSN 1084-7529 Roč. 29, č. 7 (2012), s. 1224-1236
Number of pages	13 s.
Language	eng - English
Country	US - United States
Keywords	ellipsoidal nanorod ; optical tweezers ; Rayleigh approximation
Subject RIV	BH - Optics, Masers, Lasers
R&D Projects	GA202/09/0348 GA ČR - Czech Science Foundation (CSF)
	ED0017/01/01 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UPT-D - RVO:68081731
UT WOS	000306103700004
DOI	10.1364/JOSAA.29.001224
Annotation	Within the Rayleigh approximation, we investigate the behavior of an individual ellipsoidal metal nanorod that is optically confined in three dimensions using a single focused laser beam. We focus on the description of the optical torque and optical force acting upon the nanorod placed into a linearly polarized Gaussian beam (scalar description of the electric field) or a strongly focused beam (vector field description). The study comprises the influence of the trapping laser wavelength, the angular aperture of focusing optics, the orientation of the ellipsoidal nanorod, and the aspect ratio of its principal axes. The results reveal a significantly different behavior of the nanorod if the trapping wavelength is longer or shorter than the wavelength corresponding to the longitudinal plasmon resonance mode. Published experimental observations are compared with our theoretical predictions with satisfactory results.
Workplace	Institute of Scientific Instruments
Contact	Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178
Year of Publishing	2013

Number of the records: 1