Photonics Research, 2018, 6 (10): 10000981, Published Online: Oct. 8, 2018
Sequential trapping of single nanoparticles using a gold plasmonic nanohole array Download: 710次
Abstract
We have used a gold nanohole array to trap single polystyrene nanoparticles, with a mean diameter of 30 nm, into separated hot spots located at connecting nanoslot regions. A high trap stiffness of approximately 0.85 fN / ( nm · mW ) at a low-incident laser intensity of ~ 0.51 mW / μm 2 at 980 nm was obtained. The experimental results were compared to the simulated trapping force, and a reasonable match was achieved. This plasmonic array is useful for lab-on-a-chip applications and has particular appeal for trapping multiple nanoparticles with predefined separations or arranged in patterns in order to study interactions between them.
Xue Han, Viet Giang Truong, Prince Sunil Thomas, Síle Nic Chormaic. Sequential trapping of single nanoparticles using a gold plasmonic nanohole array[J]. Photonics Research, 2018, 6(10): 10000981.