Thermally induced micro-motion by inflection in optical potential

0477925 - ÚPT 2018 RIV GB eng J - Journal Article
Šiler, Martin - Jákl, Petr - Brzobohatý, Oto - Ryabov, A. - Filip, R. - Zemánek, Pavel
Thermally induced micro-motion by inflection in optical potential.
Scientific Reports. Roč. 7, MAY (2017), s. 1-8, č. článku 1697. ISSN 2045-2322. E-ISSN 2045-2322
R&D Projects: GA ČR GB14-36681G; GA MŠMT(CZ) LO1212; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : molecular motors * brownian-motion * manipulation * efficiency * tweezers
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 4.122, year: 2017

Recent technological progress in a precise control of optically trapped objects allows much broader ventures to unexplored territory of thermal motion in non-linear potentials. In this work, we exploit an experimental set-up of holographic optical tweezers to experimentally investigate Brownian motion of a micro-particle near the inflection point of the cubic optical potential. We present two complementary views on the non-linear Brownian motion. On an ensemble of stochastic trajectories, we simultaneously determine (i) the detailed short-time position statistics and (ii) the long-distance first-passage time statistics. We evaluate specific statistical moment ratios demonstrating strongly non-linear stochastic dynamics. This is a crucial step towards a possible massive exploitation of the broad class of complex non-linear stochastic effects with objects of more complex structure and shape including living ones.
Permanent Link: http://hdl.handle.net/11104/0274136