Advanced methods of optical manipulations with microparticles and nanoparticles

15 03/2013

Friday, 15 Mar. 2013, 15:30 - 16:30

Presenter: Pavel Zemánek - Institute of Scientific Instruments of the ASCR, Brno
Host: A.Rauschenbeutel
Where: Lecture Hall, ATI, Stadionallee 2, 1020 Wien

Optical micro‐manipulation techniques have been using for more than 30 years to transfer the momentum from light to microparticles or nanoparticles and influence their movement in liquid, on surface, or in air. These days such techniques become more developed and frequently used in physics, chemistry and biology to manipulate, trap, rotate, or sort various types of microparticles and nanoparticles, including living cells in a contactless and gentle way [1]. I will briefly introducee principle and "classical" metds optical micromanipulations, such as optical tweezers, holographic optical tweezers, and their combinations with selected diagnostics methods (i.e. Raman tweezers [2]). I will mainly focus on physical background and experimental demonstration of novel micromanipulation methods that cover synchronous delivery of thousands of confined microobjects (e.g. optical conveyor belts) [3], utilization of non‐Gauassian beams and passive optical sorting [4]. Increasing number of particles confined in the beam leads to their interaction via scattered light (so called optical binding) and their spatial self‐organization into optically bound matter. The principle and utilization of the optical "tractor" beam [6] will be presented as an example that combines all the phenomena mentioned above.

 

[1] Jonas, A., Zemanek, P., (2008) Electrophoresis 29, 4813‐4851

[2] Petrov, D.V. J. Opt. A (2007) Pure Appl. Opt. 9, S139–S156

[3] Cizmar, T. et al. (2006) Appl. Phys. B 84, 197.

[4] Dholakia, K. et al. (2007) Methods in Cell Biology 82, 467‐495.

[5] Dholakia, K., Zemanek, P., (2010) Rev. Mod. Phys. 82, 1767‐1791

[6] Brzobohaty, O. et al. (2013) Nature Photonics 7, 123‐127