Dual-mode subwavelength trapping by plasmonic tweezers based on V-type nanoantennas

• DOI: 10.1364/ol.44.000319
• Publication Date: 2019-01-08T14:21:58Z
• Authors: Ren-Chao Jin; Jia-Qi Li; Lin Li; Zheng-Gao Dong; Yongmin Liu
• Keywords: Tweezers

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