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Proceedings Paper

Experimental setup for the direct measurement of a light-induced attractive force between two metal bodies
Author(s): D. Nies; Sebastian Buetefisch; Dirk Naparty; M. Wurm; O. Belai; D. Shapiro; V. Nesterov
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Paper Abstract

For numerous applications in science and engineering, the development of technologies for assembling and manipulating macro-, micro-, and nano-objects by means of laser light is of high interest. Most of these attractive forces require dielectric particles they can act on. In recently published papers, a negative light pressure was predicted which acts on metallic bodies if these are separated by a subwavelength slit and which arises from surface plasmon interaction between the metallic bodies1,2. An experimental demonstration of this force has not yet been carried out. First theoretical calculations showed that, for example, a laser power of 100 mW which is fully absorbed in the slit of a laser with a wavelength of 1550 nm would, in a slit having a width of half the wavelength, generate a force of about 1 nN. However, this is roughly three times the force of the radiation pressure of about 0.33 nN.

In this work, we present an experimental setup to measure this force, together with results of refined theoretical calculations and with preliminary results achieved with the experimental setup.

Paper Details

Date Published: 16 September 2016
PDF: 6 pages
Proc. SPIE 9922, Optical Trapping and Optical Micromanipulation XIII, 99222L (16 September 2016); doi: 10.1117/12.2235901
Show Author Affiliations
D. Nies, Physikalisch-Technische Bundesanstalt (Germany)
Sebastian Buetefisch, Physikalisch-Technische Bundesanstalt (Germany)
Dirk Naparty, Physikalisch-Technische Bundesanstalt (Germany)
M. Wurm, Physikalisch-Technische Bundesanstalt (Germany)
O. Belai, Institute of Automation and Electrometry (Russian Federation)
D. Shapiro, Institute of Automation and Electrometry (Russian Federation)
V. Nesterov, Physikalisch-Technische Bundesanstalt (Germany)

Published in SPIE Proceedings Vol. 9922:
Optical Trapping and Optical Micromanipulation XIII
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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