Nano-ring arrays for sub-micron particle trapping

Xue Han; Viet Giang Truong; Síle Nic Chormaic

doi:10.1117/12.2270524

18 April 2017 Nano-ring arrays for sub-micron particle trapping

Xue Han, Viet Giang Truong, Síle Nic Chormaic

Proceedings Volume 10252, Optical Manipulation Conference; 102520R (2017) https://doi.org/10.1117/12.2270524
Event: SPIE Technologies and Applications of Structured Light, 2017, Yokohama, Japan

Abstract

Plasmonic tweezers based on nano-ring arrays on gold thin film are demonstrated. A cylindrical surface plasmon resonance is generated in the aperture of a nano-ring and a transmission peak results. When nano-slits are included to connect the nano-rings, the transmission peak becomes narrower. When the size of the aperture of the nano-ring is reduced, this peak is red-shifted. Both 0.5 μm and 1 μm polystyrene particles are trapped successfully by nano-ring arrays. A self-induced back-action effect is observed when a red-shifted laser beam is used. With multiple trapping sites provided by the nano-ring array, this type of plasmonic tweezers has huge potential to be integrated in lab-on-a-chip systems for life sciences research.

Citation Download Citation

Xue Han, Viet Giang Truong, and Síle Nic Chormaic "Nano-ring arrays for sub-micron particle trapping", Proc. SPIE 10252, Optical Manipulation Conference, 102520R (18 April 2017); https://doi.org/10.1117/12.2270524

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