Low-power nano-optical vortex trapping via plasmonic diabolo nanoantennas
In: Nature communications, Jg. 2 (2011-07-11)
Online
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Zugriff:
Optical vortex trapping can allow the capture and manipulation of micro- and nanometre-sized objects such as damageable biological particles or particles with a refractive index lower than the surrounding material. However, the quest for nanometric optical vortex trapping that overcomes the diffraction limit remains. Here we demonstrate the first experimental implementation of low-power nano-optical vortex trapping using plasmonic resonance in gold diabolo nanoantennas. The vortex trapping potential was formed with a minimum at 170 nm from the central local maximum, and allowed polystyrene nanoparticles in water to be trapped strongly at the boundary of the nanoantenna. Furthermore, a large radial trapping stiffness, ~0.69 pN nm(-1) W(-1), was measured at the position of the minimum potential, showing good agreement with numerical simulations. This subwavelength-scale nanoantenna system capable of low-power trapping represents a significant step toward versatile, efficient nano-optical manipulations in lab-on-a-chip devices.
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Low-power nano-optical vortex trapping via plasmonic diabolo nanoantennas
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Autor/in / Beteiligte Person: | Kang, Ju-Hyung ; Ho Seok Ee ; Hong Gyu Park ; Yoon, Tae-Young ; Seo, Min-Kyo ; Lee, Yong-Hee ; Kim, Kipom |
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Zeitschrift: | Nature communications, Jg. 2 (2011-07-11) |
Veröffentlichung: | 2011 |
Medientyp: | unknown |
ISSN: | 2041-1723 (print) |
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