Wang Jihao, Wei Hua, Wang Chenyang, Huang Yingzhou, Chen Guo, Liu Anping
Appl Opt. 2021 Aug 20;60(24):7094-7098. doi: 10.1364/AO.432686.
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 microsphere. The finite-difference time-domain simulation is used to study the influence of the size of the microsphere and the 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.
具有互补光学特性的光子和等离子体元件的结合推动了光等离子体混合系统的发展，在该系统中光子和等离子体元件可以协同相互作用，突破了传统结构的限制。本文理论上提出了一种利用金纳米蝴蝶结和微球的新型光等离子体镊子。采用时域有限差分模拟研究了聚二甲基硅氧烷中微球和半球尺寸对光势阱的影响。模拟结果表明，该结构的电场强度比金纳米蝴蝶结结构提高了6倍，梯度力和捕获势也显著提高。
