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10 November 2016 Optical tweezing by photochemistry (Conference Presentation)
Zouheir Sekkat, Satoshi Kawata, Yasushi Inouye, Hidekazu Ishitobi
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Proceedings Volume 9922, Optical Trapping and Optical Micromanipulation XIII; 99221M (2016) https://doi.org/10.1117/12.2236628
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States
Abstract
Optical tweezing;by photochemistry is a novel concept in the field of optical manipulation. I discuss it in azo-polymer films through theory and experiments. I will show that optical tweezing can be obseved by a photochemical force, e.g. photoisomerization force which leads to a spring type motion. This force is derived from a harmonic light potential that moves the azo-polymer, and it is parenting to optical tweezers since it occurs in the presence of a gradient of light intensity, but it is quite different in the sense that it requires photoisomerization to occur. The azo-polymer’s motion is governed by four competing forces: the photoisomerization force, and the restoring optical gradient and elastic forces, as well as the random forces due to spontaneous diffusion.
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Zouheir Sekkat, Satoshi Kawata, Yasushi Inouye, and Hidekazu Ishitobi "Optical tweezing by photochemistry (Conference Presentation)", Proc. SPIE 9922, Optical Trapping and Optical Micromanipulation XIII, 99221M (10 November 2016); https://doi.org/10.1117/12.2236628
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KEYWORDS
Optical trapping
Photochemistry
Optical tweezers
Diffusion
Optical manipulation
Current controlled current source
Optical micromanipulation
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