Single and multiple micro-particle trapping using non-Gaussian beams from optical fiber nano-antennas

Optical trapping of dielectric micro-particles is reported using an optical tweezers based on two original chemically etched fiber nano-antenna. The nano-antenna converts Gaussian beam into non-diffracting type quasi-Bessel beam which is used in trapping micro-particles. Stable trapping in three dis...

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Bibliographic Details
Published inIEEE journal of selected topics in quantum electronics Vol. 21; no. 4
Main Authors Decombe, Jean-Baptiste, Mondal, Samir K., Kumbhakar, Dharmadas, Sarkar Pal, Sudipta, Fick, Jochen
Format Journal Article
LanguageEnglish
Published Institute of Electrical and Electronics Engineers 01.07.2015
Subjects
Optics
Physics
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Summary:Optical trapping of dielectric micro-particles is reported using an optical tweezers based on two original chemically etched fiber nano-antenna. The nano-antenna converts Gaussian beam into non-diffracting type quasi-Bessel beam which is used in trapping micro-particles. Stable trapping in three distinct positions is observed for an antenna distance of 32.5 µm and for light powers as low as 1.3 mW.Optical trapping properties are studied by applying Boltzmann statistics to the particle position fluctuations. Harmonic trapping potentials with trap stiffness of 3.5 pN/µm are observed. The FDTD simulation results on the antenna optics are also included to understand the trapping mechanism.
ISSN:1077-260X
DOI:10.1109/JSTQE.2014.2358194