Optical gecko toe: optically controlled attractive near-field forces between plasmonic metamaterials and dielectric or metal surfaces


Zhang, J., MacDonald, K. and Zheludev, N. (2012) Optical gecko toe: optically controlled attractive near-field forces between plasmonic metamaterials and dielectric or metal surfaces. Physical Review B, 85, (20), 205123-[5 pages]. (doi:10.1103/PhysRevB.85.205123).

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Description/Abstract

On the mesoscopic scale, electromagnetic forces are of fundamental importance to an enormously diverse range of systems, from optical tweezers to the adhesion of gecko toes. Here we show that a strong light-driven force may be generated when a plasmonic metamaterial is illuminated in close proximity to a dielectric or metal surface. This near-field force can exceed radiation pressure and Casimir forces to provide an optically controlled adhesion mechanism mimicking the gecko toe: At illumination intensities of just a few tens of nW/μm2 it is sufficient to overcome the Earth’s gravitational pull.

Item Type: Article
ISSNs: 1098-0121 (print)
1550-235X (electronic)
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Physical Sciences and Engineering > Optoelectronics Research Centre
ePrint ID: 339961
Date Deposited: 06 Jun 2012 12:18
Last Modified: 28 Mar 2014 15:19
Projects:
NANOSTRUCTURED PHOTONIC METAMATERIALS
Funded by: EPSRC (EP/G060363/1)
Led by: Nikolay Zheludev
1 January 2010 to 31 December 2015
URI: http://eprints.soton.ac.uk/id/eprint/339961

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