Single laser beam based passive optical sorter

0422286 - ÚPT 2014 RIV US eng C - Conference Paper (international conference)
Brzobohatý, Oto - Karásek, Vítězslav - Šiler, Martin - Chvátal, Lukáš - Čižmár, T. - Zemánek, Pavel
Single laser beam based passive optical sorter.
Complex Light and Optical Forces VII part of Photonics West /Proceedings of SPIE Vol. 8637/. Bellingham: SPIE, 2013, 863715:1-8. ISSN 0277-786X.
[Conference on Complex Light and Optical Forces /7./ part of Photonics West. San Francisco (US), 05.02.2013-07.02.2013]
R&D Projects: GA TA ČR TE01020233; GA ČR GA202/09/0348; GA ČR GPP205/11/P294; GA MŠMT LH12018; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : optical trapping * optical sorting * tractor beam * particle delivery
Subject RIV: BH - Optics, Masers, Lasers

We demonstrate experimentally a new method of sorting of colloidal particle suspension in wide single laser beam. The sorting is performed in a realization of a tractor beam a weakly focused laser beam that is retro-reflected under an oblique angle. In this configuration the lateral positions of particles dependent on the direction of linear polarization of the beam. Polarization rotation by 90 degrees changes the sign of the lateral optical force acting upon particles of certain properties and such particles are propelled in the opposite direction. This approach provides surprisingly efficient way of passive sorting of tens of particles by pure switching the beam polarization.
Permanent Link: http://hdl.handle.net/11104/0228476