Abstract
The results of theoretical analysis and direct measurements of the force exerted by light on extended metallic microobjects with smooth and rough surfaces, as well as with fine-dispersed conducting coating (amorphous carbon), are reported. Experiments are performed with cylindrical objects (molybdenum wire), which permits the use of differential beam balance for absolute measurements of light force. A suppression of the contribution from light pressure on objects with rough surfaces is detected, which makes it possible to determine the intensity of the gradient interaction with a Gaussian laser radiation field. The possibility of enhancement of the gradient interaction of rough metallic microobjects due to excitation of surface plasmons in them is considered. The features of the developed technique are analyzed as applied to measurement of optical parameters of small weighted amounts of fine-dispersed conducting substances and nanoobjects.
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Original Russian Text © I.A. Kartashov, E.M. Leibov, A.V. Shishaev, 2009, published in Zhurnal Tekhnicheskoĭ Fiziki, 2009, Vol. 79, No. 10, pp. 110–118.
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Kartashov, I.A., Leibov, E.M. & Shishaev, A.V. Gradient interaction between extended metallic microobjects with a fine-dispersed conducting coating and a Gaussian laser radiation field. Tech. Phys. 54, 1511–1519 (2009). https://doi.org/10.1134/S1063784209100168
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DOI: https://doi.org/10.1134/S1063784209100168