Sökning: id:"swepub:oai:research.chalmers.se:728aa619-d11c-48ff-bd2a-578a692f1168" >
Optical Tweezing an...
Optical Tweezing and Photothermal Properties of Resonant Dielectric and Metallic Nanospheres
-
- Odebo Länk, Nils, 1988 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, Göteborg, Sweden
-
- Johansson, Peter, 1961 (författare)
- Örebro universitet,Institutionen för naturvetenskap och teknik,Department of Physics, Chalmers University of Technology, Göteborg, Sweden,Chalmers tekniska högskola,Chalmers University of Technology,Örebro University
-
- Käll, Mikael, 1963 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, Göteborg, Sweden
-
(creator_code:org_t)
- 2020-07-20
- 2020
- Engelska.
-
Ingår i: ACS Photonics. - : American Chemical Society (ACS). - 2330-4022. ; 7:9, s. 2405-2412
- Relaterad länk:
-
https://research.cha...
-
visa fler...
-
https://doi.org/10.1...
-
https://research.cha...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- Optically trapped nanoparticles can be used as efficient mobile probes of nanoscopic forces and temperatures. However, it is crucial that the trapped particle has minimal influence on the system under study while providing a strong enough optical response to actually allow for optical manipulation. This puts severe constraints on the particle size and thermal properties. In particular, strong optical responses associated with plasmon resonances in noble metal nanoparticles and Mie resonances in high index dielectric particles can significantly affect trap stability through enhanced radiation pressure forces and photoinduced heating. Using Mie theory and hot Brownian motion analysis, we calculate trap stability and photothermal properties for nanospheres composed of the best (Ag) and most widely used (Au) plasmonic materials as well as for crystalline and amorphous Si, the prototypic high-index dielectric, using polystyrene as a low-index reference material. We calculate trap stability properties for optical tweezers based on high numerical aperture optics (NA = 1.2) for three of the most widely used laser wavelengths (532, 785, and 1064 nm) and for the case of trapping in water. The results reveal the specific particle size ranges for which optical tweezing is possible in two and three dimensions and indicate that crystalline Si nanoparticles trapped using near-infrared laser beams are the optimal choice for temperature-sensitive optical manipulation applications with small particles.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
Nyckelord
- optical trapping
- transition matrix
- hot Brownian motion
- optical forces
- high-index nanoparticles
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas