Particle jumps between optical traps in a one-dimensional (1D) optical lattice

0350856 - ÚPT 2011 RIV DE eng J - Journal Article
Šiler, Martin - Zemánek, Pavel
Particle jumps between optical traps in a one-dimensional (1D) optical lattice.
New Journal of Physics. Roč. 12, Aug 2 (2010), 083001:1-20. ISSN 1367-2630. E-ISSN 1367-2630
R&D Projects: GA MŠMT(CZ) LC06007; GA MŠMT OC08034
Institutional research plan: CEZ:AV0Z20650511
Keywords : stochastic resonance * brownian-motion * tweezers * forces * manipulation * calibration * separation * interface * diffusion * tracking
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 3.849, year: 2010

We address the problem of stochastic particle transitions between stable positions in a one-dimensional (1D) periodic potential profile. With respect to experimental realization, such stable positions are represented by the optical traps formed in an evanescent standing wave. The behaviour of sub-micrometre-sized particles in this 'optical potential energy landscape' is analysed theoretically and experimentally, and the emphasis is put on particle jumps between neighbouring optical traps. Our theoretical model assumes overdamped stochastic motion of a particle in a finite-depth potential well. Subsequently, the mean first passage time is utilized to express the new quantity called the mean optical trap escape time (MOTET), which describes the mean time of the particle escape to a neighbouring stable position (optical trap).
Permanent Link: http://hdl.handle.net/11104/0190745