Particle escape over a potential barrier in 1D optical potential energy landscape

0352214 - ÚPT 2011 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Šiler, Martin - Zemánek, Pavel
Particle escape over a potential barrier in 1D optical potential energy landscape.
Optical Trapping and Optical Micromanipulation VII (Proceedings of SPIE Vol. 7762). Bellingham: SPIE, 2010, 776214: 1-8. ISBN 978-0-8194-8258-7.
[Optical Trapping and Optical Micromanipulation /7./. San Diego (US), 01.08.2010]
Grant CEP: GA MŠMT(CZ) LC06007; GA MŠMT OC08034
Výzkumný záměr: CEZ:AV0Z20650511
Klíčová slova: optical lattice * optical tweezers * stochastic motion * Brownian motion * Kramers rate * mean first passage time * periodic potential
Kód oboru RIV: BH - Optika, masery a lasery

We address the problem of the stochastic particle transitions between stable positions in a one-dimensional periodic potential profile. With respect to the experimental realization such stable positions are represented by the optical traps formed in a standing wave. The behavior of sub-micrometer sized particles in this "optical potential energy landscape" is analyzed theoretically and experimentally and the stress is put on the particles jumps between the neighboring optical traps. Our theoretical model assumes over-damped stochastic motion of a particle in a finite-depth potential well. Subsequently, Mean First Passage Time is utilized to express the new quantity called the Mean Optical Trap Escape Time (MOTET) that describes the mean time of the particle escape to a neighboring stable position (optical trap).
Trvalý link: http://hdl.handle.net/11104/0191779