Optically Induced Forces Imposed in an Optical Funnel on a Stream of Particles in Air or Vacuum

Niko Eckerskorn, Richard Bowman, Richard A. Kirian, Salah Awel, Max Wiedorn, Jochen Küpper, Miles J. Padgett, Henry N. Chapman, and Andrei V. Rode Laser Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 2601, Australia SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom Nanophotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom Center for Free-Electron Laser Science, DESY, 22607 Hamburg, Germany Department of Physics, Arizona State University, Tempe, Arizona 85287-1504, USA Department of Physics, Universität Hamburg, 22761 Hamburg, Germany Center for Ultrafast Imaging, Universität Hamburg, 22761 Hamburg, Germany (Received 27 August 2015; revised manuscript received 29 October 2015; published 11 December 2015)