منابع مشابه
Optical forces in nanorod metamaterial
Optomechanical manipulation of micro and nano-scale objects with laser beams finds use in a large span of multidisciplinary applications. Auxiliary nanostructuring could substantially improve performances of classical optical tweezers by means of spatial localization of objects and intensity required for trapping. Here we investigate a three-dimensional nanorod metamaterial platform, serving as...
متن کاملOptical forces between metallic particles.
We calculate the optical attractive forces that occur between 30-nm Au or Ag nanocrystals when irradiated at visible wavelengths. These forces show resonances at dipolar plasmon wavelengths, similar to resonances in the near-field electromagnetic intensities. At MW/cm2 intensities, optical forces can be stronger than van der Waals forces and could be used to organize metallic particles. We also...
متن کاملForces in Optical Near- elds
As early as 1619 Johannes Kepler suggested that the mechanical e ect of light might be responsible for the de ection of the tail of comets entering our solar system. The classical Maxwell theory showed in 1873 that the radiation eld carries with it momentumand that "light pressure" is exerted on illuminated objects. In 1905 Einstein introduced the concept of the photon and showed that energy tr...
متن کاملOptical Tweezers: Measuring Piconewton Forces
Optical tweezers instruments use the forces of laser radiation pressure to trap small particles. Using various techniques, these trapped particles can then be manipulated and forces on the objects in the trap can be measured. The forces that such an instrument is capable of measuring are of the order of one to 100 piconewtons (pN). While this technique has been used for over 20 years to manipul...
متن کاملOptical transduction of chemical forces.
We describe a plasmonic crystal device possessing utility for optically transducing chemical forces. The device couples complex plasmonic fields to chemical changes via a chemoresponsive, surface-bound hydrogel. We find that this architecture significantly enhances the spectroscopic responses seen at visible wavelengths while enabling capacities for sensitive signal transduction, even in cases ...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2015
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.92.023823