Počet záznamů: 1
Synchronization of colloidal rotors through angular optical binding
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SYSNO ASEP 0464941 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Synchronization of colloidal rotors through angular optical binding Tvůrce(i) Simpson, Stephen Hugh (UPT-D) RID, SAI
Chvátal, Lukáš (UPT-D) RID, ORCID, SAI
Zemánek, Pavel (UPT-D) RID, SAI, ORCIDCelkový počet autorů 3 Zdroj.dok. Physical Review A. - : American Physical Society - ISSN 2469-9926
Roč. 93, č. 2 (2016), 023842:1-12Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova hydrodynamic properties ; colloidal rotors ; angular optical binding Vědní obor RIV BH - Optika, masery a lasery CEP GB14-36681G GA ČR - Grantová agentura ČR Institucionální podpora UPT-D - RVO:68081731 UT WOS 000370840200013 EID SCOPUS 84959498117 DOI 10.1103/PhysRevA.93.023842 Anotace A mechanism for the synchronization of driven colloidal rotors via optical coupling torques is presented and analyzed. Following our recent experiments [Brzobohaty et al., Opt. Express 23, 7273 (2015)], we consider a counterpropagating optical beam trap that carries spin angular momentum, but no net linear momentum, operating in an aqueous solvent. The angular momentum carried by the beams causes the continuous low-Reynolds-number rotation of spheroidal colloids. Due to multiple scattering, the optical torques experienced by these particles depend on their relative orientations, while the effect of hydrodynamic interaction is negligible. This results in frequency pulling, which causes weakly dissimilar spheroids to synchronize their rotation rates and lock their relative phases. The effect is qualitatively captured by a coupled dipole model and quantitatively reproduced by T -matrix calculations. For pairs of rotors, the relative torque Delta tau is shown to vary with relative phase Delta phi according to Delta tau approximate to A sin(2 Delta phi + delta) + B for constants A, B, delta, so the resulting motion is governed by the well-known Adler equation. We show that this behavior can be preserved for larger numbers of particles. The application of these phenomena to the inertial motion of particles in vacuum could provide a route to the sympathetic cooling of mesoscopic particles. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2017
Počet záznamů: 1