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Title: Optical pulling of airborne absorbing particles and smut spores over a meter-scale distance with negative photophoretic force

We demonstrate optical pulling of single light-absorbing particles and smut spores in air over a meter-scale distance using a single collimated laser beam based on negative photophoretic force. The micron-sized particles are pulled towards the light source at a constant speed of 1–10 cm/s in the optical pulling pipeline while undergoing transverse rotation at 0.2–10 kHz. The pulled particles can be manipulated and precisely positioned on the entrance window with an accuracy of ∼20 μm, and their chemical compositions can be characterized with micro-Raman spectroscopy.
Authors:
; ;  [1]
  1. Department of Physics, East Carolina University, Greenville, North Carolina 27858-4353 (United States)
Publication Date:
OSTI Identifier:
22398957
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; CHEMICAL COMPOSITION; DISTANCE; KHZ RANGE; LASER RADIATION; LIGHT SOURCES; OPTICS; PARTICLES; RAMAN SPECTROSCOPY; ROTATION; VELOCITY; VISIBLE RADIATION