Work

Role of thermal effect on the capture stability of plasmonic optical tweezers

Year: 2024

Type: article

Abstract: Plasmonic optical tweezers exhibit excellent potential in the manipulation of nanoparticles, which advances the fields of nano medicine, chemical and biological sensing, and robotics. However, the capture stability of nanoparticles is affected by the heat generation of the plasmon nanostructure. This work investigates the influence of the thermoplasmonic effect of gold nanobrick antenna on the optical capture of nanoparticles. Due to the enhancement of local electromagnetic field and strong heat generation of gold nanobrick antenna, various optothermo-matter interactions will occur. On this basis, the effects of optical, thermophoretic, and thermo-osmotic forces on the motion of Brownian nanoparticles are analyzed. Afterward, the factors that affect the capture efficiency are investigated. The results indicate that the photothermal effect of nanobrick antenna can reduce the capture efficiency of nanoparticles. In addition, increasing the refractive index or diameter of nanoparticles, thermal conductivity of the substrate, and incident laser power can improve the capture efficiency.

Source: Case Studies in Thermal Engineering

DOI: 10.1016/j.csite.2024.105559

Authors: Yukun Ji, Yatao Ren, Xuehui Wang, Hong Qi

Institutions: Harbin Institute of Technology, University College Dublin

Language: English

Topic: Orbital Angular Momentum in Optics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,210

Funders: National Natural Science Foundation of China, Natural Science Foundation of Heilongjiang Province