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Optically controlled stochastic jumps of individual gold nanorod rotary motors
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- Shao, Lei, 1987 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, Göteborg, Sweden
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- Andrén, Daniel, 1991 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, Göteborg, Sweden
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- Jones, Steven, 1990 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, Göteborg, Sweden
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- American Physical Society, 2018
- 2018
- English.
- In: Physical Review B. - : American Physical Society. - 2469-9969 .- 2469-9950. ; 98:8
- Journal article (peer-reviewed)
Abstract
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- Brownian microparticles diffusing in optical potential-energy landscapes constitute a generic test bed for nonequilibrium statistical thermodynamics and have been used to emulate a wide variety of physical systems, ranging from Josephson junctions to Carnot engines. Here we demonstrate that it is possible to scale down this approach to nanometric length scales by constructing a tilted washboard potential for the rotation of plasmonic gold nanorods. The potential depth and tilt can be precisely adjusted by modulating the light polarization. This allo`ws for a gradual transition from continuous rotation to discrete stochastic jumps, which are found to follow Kramers dynamics in excellent agreement with stochastic simulations. The results widen the possibilities for fundamental experiments in statistical physics and provide insights into how to construct light-driven nanomachines and multifunctional sensing elements.
Subject headings
- NATURVETENSKAP -- Matematik -- Beräkningsmatematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Computational Mathematics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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