17 May 2010 Speckle field as a multiple particle trap
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Abstract
We demonstrate that a speckle pattern in the spatially coherent laser field transmitted by a diffuser forms a multitude of three-dimensional bottle-shaped micro-traps. These multiple traps serve as a means for an effective trapping of large number of air-born absorbing particles. Confinement of up to a few thousand particles in air with a single beam has been achieved. The ability to capture light-absorbing particles suspended in gases by optical means opens up rich and diverse practical opportunities, including development of photonic shielding/fencing for environmental protection in nanotechnology industry and new methods of touch-free air transport of particles and small containers, which may hold dangerous substances, or viruses and living cells.
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V. G. Shvedov, V. G. Shvedov, A. V. Rode, A. V. Rode, Ya. V. Izdebskaya, Ya. V. Izdebskaya, A. S. Desyatnikov, A. S. Desyatnikov, W. Krolikowski, W. Krolikowski, Yu. S. Kivshar, Yu. S. Kivshar, } "Speckle field as a multiple particle trap", Proc. SPIE 7715, Biophotonics: Photonic Solutions for Better Health Care II, 77150K (17 May 2010); doi: 10.1117/12.854769; https://doi.org/10.1117/12.854769
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