Nanofabrication beyond optical diffraction limit: Optical driven assembly enabled by superlubricity
arxiv(2024)
摘要
The optical manipulation of nanoparticles on superlubricity surfaces is
investigated. The research revealed that, due to the near-zero static friction
and extremely low dynamic friction at superlubricity interfaces, the maximum
intensity for controlling the optical field can be less than 100 W/cm^2,
which is nine orders of magnitude lower than controlling nanoparticles on
traditional interfaces. The controlled nanoparticle radius can be as small as 5
nm, which is more than one order of magnitude smaller than nanoparticles
controlled through traditional optical manipulation. Manipulation can be
achieved in sub-microsecond to microsecond timescales. Furthermore, the
manipulation takes place on solid surfaces and in non-liquid environments, with
minimal impact from Brownian motion. By appropriately increasing dynamic
friction, controlling light intensity, or reducing pressure, the effects of
Brownian motion can be eliminated, allowing for the construction of
microstructures with a size as small as 1/75 of the wavelength of light. This
enables the control of super-resolution optical microstructures. The optical
super-resolution manipulation of nanoparticles on superlubricity surfaces will
find important applications in fields such as nanofabrication,
photolithography, optical metasurface, and biochemical analysis.
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