title: Optical manipulation of aerosol droplets using a holographic dual and single beam trap.
abstract: We present optical trapping and manipulation of pure water and salt water airborne droplets of various sizes ranging from sub-micrometers up to several tens of micrometers in a holographic dual and single beam trap. In the dual beam trap, successful fusion of droplets as well as precise delivery of many droplets and manipulation of multiple droplets are demonstrated. Furthermore, employing the transfer of the orbital angular momentum of light from Laguerre-Gaussian beams, we show that the water droplets orbit around the beam propagation axis and their tangential speed can be controlled by beam waist magnitude. We also demonstrate that sub-micrometer sized pure water droplets can be trapped and manipulated by a single beam trap with a relatively low numerical aperture. In this case, multiple stable trapping positions were observed, both theoretically and experimentally, which were due to the optical intensity oscillations in the focal region of the laser beam.
authors: Oto
authors: O
authors: Brzobohatý
authors: Martin
authors: M
authors: Šiler
authors: Jan
authors: J
authors: Ježek
authors: Petr
authors: P
authors: Jákl
authors: Pavel
authors: P
authors: Zemánek
mesh_terms: D000336:Aerosols / Q000737:chemistry* / Q000302:isolation & purification* / Q000528:radiation effects; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006696:Holography / Q000295:instrumentation*; D007368:Interferometry / Q000295:instrumentation*; D008846:Micromanipulation / Q000295:instrumentation*; D052898:Optical Tweezers
chemical_list: D000336:Aerosols