Manipulation of metal-dielectric core-shell particles in optical fields

0437741 - ÚPT 2015 RIV US eng C - Conference Paper (international conference)
Chvátal, Lukáš - Šiler, Martin - Zemánek, Pavel
Manipulation of metal-dielectric core-shell particles in optical fields.
19th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics (Proceedings of SPIE 9441). Bellingham: SPIE, 2014, 944106:1-6. ISBN 9781628415568. ISSN 0277-786X.
[Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics /19./. Jelenia Góra (PL), 08.09.2014-12.09.2014]
R&D Projects: GA TA ČR TE01020233; GA ČR GB14-36681G; GA ČR GPP205/12/P868; GA MŠMT(CZ) LO1212; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : metals * particles * optical tweezers * apertures * mie scattering * nanoplasmonics * water
Subject RIV: BH - Optics, Masers, Lasers

Metal-dielectric core-shell particles represent promising tools in nanoplasmonics. In combination with optical tweezers they can be manipulated in a contactless way through fluid and their plasmonic properties can be used to probe or modify the local environment. We perform a numerical parametric study to find the particle geometry and material parameters under which such particle can be stably confined in optical tweezers. We use the theory based on Mie scattering in the focal field of an ideal water immersion objective of numerical aperture NA=1.2. For very thin metal layers we find that strong trapping on the optical axis can be achieved.
Permanent Link: http://hdl.handle.net/11104/0241261