Trapping polystyrene particles using plasmonic tweezers

Subject Areas : Electronic Engineering

Ebrahim Fooladi ¹ (Phd. Student of Electrical Engineering, Faculty of Engineering, University of Fasa, Iran)
mojtaba sadeghi ² (Department of Electrical Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran)
zahra adelpour ³ (Department of Electrical Engineering. Shiraz Branch, Islamic Azad University, Shiraz, Iran)
farhad bahadori-jahromi ⁴ (Department of Electrical Engineering, Fasa Branch, Islamic Azad University, Fasa, Iran)

Received: 2024-04-18 Accepted : 2024-07-11 Published : 2024-07-31

Keywords: Optical fiber, Twin-core, Plasmonic, Tweezers, Trapping,

Abstract :

This research analyzes and examines the use of plasmonic tweezers in the field of biotechnology, focusing on an inclined twine-core plasmonic optical fiber tweezer. This tweezer was designed and modeled using COMSOL software and through numerical simulations, it exhibits its capacity to trap polystyrene particles on a nano-scale. The results obtained from the research show that changes in different parameters such as the wavelength used, the radius of the trapped particle, and the refractive index of the medium used, lead to changes in the trapping force. The increase in the refractive index of the environment and the dimensions of the particles causes a significant increase in the applied force, especially in short wavelengths, the problem is more visible. These findings show that the proposed plasmonic structure has a very high trapping force, and this has the ability to significantly improve compared to previous researches. These advances in the field of biotechnology not only allow for more accurate and effective manipulation of nanoscale particles, but also facilitate the creation of new technologies in the field of medicine and other biological sciences. These developments will directly and indirectly help to improve diagnostic and treatment systems.

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