Creation of rotating spiral structures using interfering Bessel beams for optical manipulation

Posted on 04.08.2022 - 21:32
A simple and effective optical tweezer setup which uses the interference of two counter propagating Bessel beams is proposed and investigated. The potential energy of a Rayleigh particle in the generated interference patterns is numerically evaluated by writing a MATLAB code. A rigorous analytical treatment is also performed for verification the numerical results. The results show that the generated patterns have a spiral structure. It was also found that these spiral patterns and consequently the trapped particles can be rotated about the axis of the patterns by introducing a phase difference between the two beams. The suggested setup is hoped to provide an effective way for guiding particles along the spiral trajectories, making a laser-driven micro- and nanomotor, measuring the torsional properties of biological molecules and separating particle from a liquid mixture according to their mass, size or refractive index.

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Mohammadnezhad, Mohammadbagher; Abdulkareem, Sarkew S.; Hassanzadeh, Abdollah (2022): Creation of rotating spiral structures using interfering Bessel beams for optical manipulation. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.5979079.v1
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AUTHORS (3)

Mohammadbagher Mohammadnezhad
Sarkew S. Abdulkareem
Abdollah Hassanzadeh
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