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25 August 2015 Optical trapping of gold aerosols
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Abstract
Aerosol trapping has proven challenging and was only recently demonstrated.1 This was accomplished by utilizing an air chamber designed to have a minimum of turbulence and a laser beam with a minimum of aberration. Individual gold nano-particles with diameters between 80 nm and 200 nm were trapped in air using a 1064 nm laser. The positions visited by the trapped gold nano-particle were quantified using a quadrant photo diode placed in the back focal plane. The time traces were analyzed and the trapping stiffness characterizing gold aerosol trapping determined and compared to aerosol trapping of nanometer sized silica and polystyrene particles. Based on our analysis, we concluded that gold nano-particles trap more strongly in air than similarly sized polystyrene and silica particles. We found that, in a certain power range, the trapping strength of polystyrene particles is linearly decreasing with increasing laser power.
Conference Presentation
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Regina K. Schmitt, Liselotte Jauffred, S. Mohammad-Reza Taheri, Heiner Linke, and Lene B. Oddershede "Optical trapping of gold aerosols", Proc. SPIE 9548, Optical Trapping and Optical Micromanipulation XII, 95480F (25 August 2015); https://doi.org/10.1117/12.2188444
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