Metamaterial 'Gecko Toe': Optically-Controlled Adhesion to Any Surface
| Autor: | Zhang, J., MacDonald, K. F., Zheludev, N. I. |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 85, 205123 (2012) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.85.205123 |
| Popis: | 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/um^2 it is sufficient to overcome the Earth's gravitational pull. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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