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Au nanobowtie on a SiO2 microsphere for optoplasmonic trapping

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Abstract

The combination of photonic and plasmonic elements with complementary optical properties has stimulated the development of optoplasmonic hybrid systems, in which photonic and plasmonic elements can interact synergistically, breaking through the limitations of traditional structures. In this paper, a new optoplasmonic tweezer is theoretically proposed by using the Au nanobowtie and ${\rm{Si}}{{\rm{O}}_2}$ microsphere. The finite-difference time-domain simulation is used to study the influence of the size of the ${\rm{Si}}{{\rm{O}}_2}$ microsphere and the ${\rm{Si}}{{\rm{O}}_2}$ hemisphere in polydimethylsiloxane on the optical potential well. The simulation results show that the electric field intensity of the structure is increased by 6 times compared with the Au nanobowtie structure, and the gradient force and the trapping potential are also significantly improved.

© 2021 Optical Society of America

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Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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