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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 993-996 |
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Ahmadnezhad S B, Hajizadeh F. Optical binding effect on optically rotated nanoparticle. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :993-996
URL: http://opsi.ir/article-1-2002-en.html
URL: http://opsi.ir/article-1-2002-en.html
1- Department of Physics, Institute for advanced studies in basic sciences(IASBS), Zanjan, Iran
Abstract: (1754 Views)
When some particles are trapped with laser, scattered light from the particles interferes with direct light in the place of other particles and produces a new force between them, called as "Optical Binding." Constructing the two dimensions optical arrays are the products of optical binding. Here, the aim is to investigate the effect of scattered light from a particle on rotation speed and rotational Brownian motion of an optically rotated particle. In this study we provide a dual beam optical tweezers with the same wavelength and adjustable lateral distance between the trapped particles. One trap is stationary and circularly polarized, with the ability to rotate 400 nm gold nanoparticles, and the other trap is linearly polarized and is scanned at different distances relative to the rotating particle. The results show an oscillatory behavior of the rotational Brownian motion with decreasing amplitude followed by the oscillatory behavior of the nanoparticle temperature.
Keywords: Optical Binding, Optical rotation, Power Spectrum, Metallic nanoparticles, Nanoparticle Temperature
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