Chiral particles in the dual-beam optical trap

0465423 - ÚPT 2017 RIV US eng J - Journal Article
Brzobohatý, Oto - Hernández, R.J. - Simpson, Stephen Hugh - Mazzulla, A. - Cipparrone, G. - Zemánek, Pavel
Chiral particles in the dual-beam optical trap.
Optics Express. Roč. 24, č. 23 (2016), 26382:1-10. ISSN 1094-4087
R&D Projects: GA MŠMT(CZ) LD14069; GA MŠMT(CZ) LO1212; GA ČR(CZ) GA14-16195S; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : optical tweezers * optical manipulation * liquid crystals * chiral media
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 3.307, year: 2016

We investigate the dynamics of chiral microparticles in a dual-beam optical trap. The chiral particles have the structure of spherical chiral microresonators, with a reflectance deriving from the supramolecular helicoidal arrangement. Due to the strong asymmetric response of the
particles to light with a specific helicity and wavelength, their trapping position and rotational frequency can be controlled by proper combination of the polarization state of the two light beams. Here symmetric and asymmetric polarization configurations of dual- interfering beam traps have been investigated. Based on the polarization controlled asymmetric transmission of the chiral particles, a tunable wash-board potential is created enabling the control of
the trapping position along the beams axis. Asymmetric configurations display polarization controlled rotation of the trapped particles. Optical binding of rotating particles exhibits a complex dynamics.
Permanent Link: http://hdl.handle.net/11104/0263994