Electric dipole radiation near a mirror

Li, Xin; Arnoldus, Henk F.

doi:10.1103/physreva.81.053844

Cited by 16 publications

(14 citation statements)

References 13 publications

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“…Accordingly, the free-space dipole is characterized by the outward powerflow along straight radially-diverging lines, with no flow along the dipole axis ( α = 0 ), and the strongest flow in the directions α = ± π /2 90 .…”

Section: Dipole Emission Shaping With Vntsmentioning

confidence: 99%

Molding the flow of light on the nanoscale: from vortex nanogears to phase-operated plasmonic machinery

Boriskina

Reinhard

2012

Nanoscale

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Efficient delivery of light into nanoscale volumes by converting free photons into localized charge-density oscillations (surface plasmons) enables technological innovation in various fields from biosensing to photovoltaics and quantum computing. Conventional plasmonic nanostructures are designed as nanoscale analogs of radioantennas and waveguides. Here, we discuss an alternative approach for plasmonic nanocircuit engineering that is based on molding the optical powerflow through ‘vortex nanogears’ around a landscape of local phase singularities ‘pinned’ to plasmonic nanostructures. We show that coupling of several vortex nanogears into transmission-like structures results in dramatic optical effects, which can be explained by invoking a hydrodynamic analogy of the ‘photon fluid’. The new concept of vortex nanogear transmissions (VNTs) provides new design principles for the development of complex multi-functional phase-operated photonics machinery and, therefore, generates unique opportunities for light generation, harvesting and processing on the nanoscale.

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Section: Dipole Emission Shaping With Vntsmentioning

confidence: 99%

Molding the flow of light on the nanoscale: from vortex nanogears to phase-operated plasmonic machinery

Boriskina

Reinhard

2012

Nanoscale

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“…The singularity at the point labeled S seems like a bump in the road for the field lines that pass nearby. It can be shown analytically [7] that this singularity is a point on a singular circle in the plane of the mirror. The circle goes through the origin of coordinates and singularity S, and singularity S is located at y ¼ −h tan γ.…”

Section: Vortex Dynamics and Optical Vorticesmentioning

confidence: 99%

Vortices and Singularities in Electric Dipole Radiation near an Interface

Li¹,

Arnoldus²,

Xu³

2017

Vortex Dynamics and Optical Vortices

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An oscillating electric dipole in free space emits its energy along straight lines. We have considered the effect of a nearby interface with a material medium. Interference between the directly emitted radiation and the reflected radiation leads to intricate flow line patterns. When the interface is a plane mirror, numerous interference vortices appear, and when the distance between the dipole and the mirror is not too small, these vortices lie on four strings. At the center of each vortex is a singularity, and these singularities are due to the fact that the magnetic field vanishes at these locations. When the interface is a boundary between dielectric media, reflection leads again to interference. The pattern for the transmitted radiation depends on whether the medium is thicker or thinner than the material in which the dipole is embedded. For thicker dielectrics, the field lines bend toward the normal, reminiscent of, but not the same as, the behavior of optical rays. For thinner media, oscillation of energy across the interface appears, and above a crossing point, there is a tiny vortex. We have also considered the case of a dipole in between two parallel mirrors.

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“…The Feshbach resonance is a useful tool for controlling the atom-atom interaction in ultracold atom gases [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effects of an electric field on Feshbach resonances and the thermal-average scattering rate of6Li-40K collisions

et al. 2012

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Electric dipole radiation near a mirror

Cited by 16 publications

References 13 publications

Molding the flow of light on the nanoscale: from vortex nanogears to phase-operated plasmonic machinery

Molding the flow of light on the nanoscale: from vortex nanogears to phase-operated plasmonic machinery

Vortices and Singularities in Electric Dipole Radiation near an Interface

Effects of an electric field on Feshbach resonances and the thermal-average scattering rate of6Li-40K collisions

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