Abstract

We propose novel plasmonic tweezers based on silver V-type nanoantennas placed on a conducting ground layer, which can effectively mitigate the plasmonic heating effect and thus enable subwavelength plasmonic trapping in the near-infrared region. Using the centroid algorithm to analyze the motion of trapped spheres, we can experimentally extract the value of optical trapping potential. The result confirms that the plasmonic tweezers have a dual-mode subwavelength trapping capability when the incident laser beam is linearly polarized along two orthogonal directions. We have also performed full-wave simulations, which agree with the experimental data very well in terms of spectral response and trapping potential. It is expected that the dual-mode subwavelength trapping can be used in non-contact manipulations of a single nanoscale object, such as a biomolecule or quantum dot, and find important applications in biology, life science, and applied physics.

© 2019 Optical Society of America

Subwavelength optical trapping and transporting using a Bloch mode

Lin Wang, Yongyin Cao, Bojian Shi, Hang Li, Rui Feng, Fangkui Sun, Lih Y. Lin, and Weiqiang Ding
Opt. Lett. 45(7) 1886-1889 (2020)

Ultrafast nonlinear absorption enhancement of monolayer MoS₂ with plasmonic Au nanoantennas

Runlin Miao, Zhiwen Shu, Yuze Hu, Yuxiang Tang, Hao Hao, Jie You, Xin Zheng, Xiang’ai Cheng, Huigao Duan, and Tian Jiang
Opt. Lett. 44(13) 3198-3201 (2019)

Super-low-power optical trapping of a single nanoparticle

Xiaoyun Tang, Yu Zhang, Wenjie Su, Yaxun Zhang, Zhihai Liu, Xinghua Yang, Jianzhong Zhang, Jun Yang, and Libo Yuan
Opt. Lett. 44(21) 5165-5168 (2019)

Anomalous plasmon hybridization in nanoantennas near interfaces

Jingxuan Wei and Chengkuo Lee
Opt. Lett. 44(24) 6041-6044 (2019)

Dual-mode plasmonic nanorod type antenna based on the concept of a trapped dipole

Anastasios H. Panaretos and Douglas H. Werner
Opt. Express 23(7) 8298-8309 (2015)