Abstract

Deterministic optical manipulation of fluorescent nanodiamonds (FNDs) in fluids has emerged as an experimental challenge in multimodal biological imaging. Designing and developing nano-optical trapping strategies to serve this purpose is an important task. In this Letter, we show how chemically prepared gold nanoparticles and silver nanowires can facilitate an opto-thermoelectric force to trap individual entities of FNDs using a long working distance lens, low power-density illumination (532-nm laser, 12 µW/µm²). Our trapping configuration combines the thermoplasmonic fields generated by individual plasmonic nanoparticles and the opto-thermoelectric effect facilitated by the surfactant to realize a nano-optical trap down to a single FND that is 120 nm in diameter. We use the same trapping excitation source to capture the spectral signatures of single FNDs and track their position. By tracking the FND, we observe the differences in the dynamics of the FND around different plasmonic structures. We envisage that our drop-casting platform can be extrapolated to perform targeted, low-power trapping, manipulation, and multimodal imaging of FNDs inside biological systems such as cells.

© 2023 Optica Publishing Group

Plasmonic random nanostructures on fiber tip for trapping live cells and colloidal particles

Jiajie Chen, Zhiwen Kang, Siu Kai Kong, and Ho-Pui Ho
Opt. Lett. 40(17) 3926-3929 (2015)

Raman spectroscopy of optical-trapped single particle using bull’s eye nanostructure

Jian Ma, XiongJie Ning, YuanHao Lou, Dan Wu, QiuHong Min, YiRui Wang, Quan Zhang, and YuanJie Pang
Opt. Lett. 48(5) 1204-1207 (2023)

Fluorescent nanodiamonds for luminescent thermometry in the biological transparency window

Masfer H. Alkahtani, Fahad Alghannam, Linkun Jiang, Arfaan A. Rampersaud, Robert Brick, Carmen L. Gomes, Marlan O. Scully, and Philip R. Hemmer
Opt. Lett. 43(14) 3317-3320 (2018)

Particle trapping and beaming using a 3D nanotip excited with a plasmonic vortex

Kai Liu, Nicolò Maccaferri, Yuefeng Shen, Xueyun Li, Remo Proietti Zaccaria, Xuejin Zhang, Yuri Gorodetski, and Denis Garoli
Opt. Lett. 45(4) 823-826 (2020)

Replica symmetry breaking in a colloidal plasmonic random laser with gold-coated triangular silver nanostructures

Arindam Dey, Ashim Pramanik, Koushik Mondal, Subrata Biswas, Udit Chatterjee, Fabrizio Messina, and Pathik Kumbhakar
Opt. Lett. 48(15) 4141-4144 (2023)