0535416 - ÚPT 2021 RIV US eng J - Journal Article
Brzobohatý, Oto - Chvátal, Lukáš - Šiler, Martin - Zemánek, Pavel
Complex colloidal structures with non-linearoptical properties formed in an optical trap.
Optics Express. Roč. 28, č. 25 (2020), s. 37700-37707. ISSN 1094-4087
R&D Projects: GA ČR(CZ) GA18-27546S; GA MŠMT(CZ) LO1212; GA MŠMT ED0017/01/01; GA MŠMT(CZ) EF16_026/0008460
Institutional support: RVO:68081731
Keywords : optical trapping * nonlinear optical medium * artificial materials
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.894, year: 2020 ; AIS: 0.845, rok: 2020
Method of publishing: Open access
Result website:
https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-28-25-37700&id=444109DOI: https://doi.org/10.1364/OE.405839

llumination of a colloidal suspension of dielectric nanoparticles (50 nm in radius)with counter-propagating non-interfering laser beams of sufficient power leads to spatial redistri-bution of particles due to associated optical forces and formation of colloidal structures composedof thousands of nanoparticles along the beams. We employ a weak probe beam propagatingthrough the colloidal structure and demonstrate that the colloidal structure acts effectively as anon-linear optical medium, similar to a gradient index lens, with optical transformation propertiesexternally tunable by trapping laser power. With an increasing number of nanoparticles weobserve the formation of a more complex colloidal structure axially and even laterally and weexplain the origin of this process.
Permanent Link: http://hdl.handle.net/11104/0313443