Geometrical Mie theory for resonances in nanoparticles of any shape
نویسندگان
چکیده
منابع مشابه
Laser threshold of Mie resonances.
We show that time-independent scattering coefficients calculated from the standard extrapolation of Mie theory to the gain regime have physical meaning up to the laser threshold. The theoretical width of a resonance decreases linearly with increasing gain and becomes zero at the laser threshold. We performed experiments on dielectric microspheres with gain, trapped with optical tweezers. The wi...
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Uniform asymptotic approximations for the positions and widths of Mie resonances are reported . The results improve the accuracy of previous approximations, typically, by several orders of magnitude . They are suitable for fast numerical evaluation, allowing every resonance to be located well within its width, for all resonances of practical interest . The relative errors are very small even fo...
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We calculate trapping forces, trap stiffness and interference effects for spherical particles in optical tweezers using electromagnetic theory. We show the dependence of these on relative refractive index and particle size. We investigate resonance effects, especially in high refractive index particles where interference effects are expected to be strongest. We also show how these simulations c...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2011
ISSN: 1094-4087
DOI: 10.1364/oe.19.021432