Mimicking Boyer’s Casimir repulsion with a nanowire material

Maslovski, Stanislav I.; Silveirinha, Mário G.

doi:10.1103/physreva.83.022508

Cited by 31 publications

(27 citation statements)

References 46 publications

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“…For q < q p they are the only propagating modes in the structure and thus solely control spontaneous emission rate. Due to the high density of TEM photonic states one can also expect large Purcell factor [23]. For non-perfect wires TEM and TM modes mix, as can be seen from Eqs.…”

Section: Dispersion Analysismentioning

confidence: 93%

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Purcell effect in wire metamaterials

Poddubny

Belov²,

Kivshar

2013

Phys. Rev. B

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Abstract. We study theoretically the enhancement of spontaneous emission in wire metamaterials. We analyze the dependence of the Purcell factor dependence on wire dielectric constant for both electric and magnetic dipole sources, and find an optimal value of the dielectric constant for maximizing the Purcell factor for the electric dipole. We obtain analytical expressions for the Purcell factor and also provide estimates for the Purcell factor in realistic structures operating in both microwave and optical spectral range.Purcell effect in wire metamaterials 2

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Section: Dispersion Analysismentioning

confidence: 93%

“…dispersion and the absolute values of the wavevector k z increase according to Eq. (23). The growth of the wavevector for non-perfect wires is illustrated on Fig.…”

Section: Dispersion Analysismentioning

confidence: 99%

Purcell effect in wire metamaterials

Poddubny

Belov²,

Kivshar

2013

Phys. Rev. B

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“…Despite some early optimism, the conclusion seems to be settled that repulsion is impossible between metamaterials made from dielectric and metallic components [69,70,71]. For recent attempts using dielectric/magnetic setups see [72,73,74], who consider nanowires, ferrites, and topological insulators, respectively. Figure 3.…”

Section: Magnetic Repulsionmentioning

confidence: 99%

Repulsive Casimir and Casimir–Polder forces

Milton¹,

Abalo²,

Parashar³

et al. 2012

J. Phys. A: Math. Theor.

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Abstract. Casimir and Casimir-Polder repulsion have been known for more than 50 years. The general "Lifshitz" configuration of parallel semi-infinite dielectric slabs permits repulsion if they are separated by a dielectric fluid that has a value of permittivity that is intermediate between those of the dielectric slabs. This was indirectly confirmed in the 1970s, and more directly by Capasso's group recently. It has also been known for many years that electrically and magnetically polarizable bodies can experience a repulsive quantum vacuum force. More amenable to practical application are situations where repulsion could be achieved between ordinary conducting and dielectric bodies in vacuum. The status of the field of Casimir repulsion with emphasis on some recent developments will be surveyed. Here, stress will be placed on analytic developments, especially of Casimir-Polder (CP) interactions between anisotropically polarizable atoms, and CP interactions between anisotropic atoms and bodies that also exhibit anisotropy, either because of anisotropic constituents, or because of geometry. Repulsion occurs for wedge-shaped and cylindrical conductors, provided the geometry is sufficiently asymmetric, that is, either the wedge is sufficiently sharp or the atom is sufficiently far from the cylinder.Casimir Repulsion 2

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“…Arrays of metallic nanowires stand as one of the most important structures in the metamaterial realm due to their applications in electromagnetic field manipulation and imaging in the nanoscale [1][2][3], negative refraction in the optical domain [4][5][6][7], in controlling the spontaneous emission of light by quantum-emitters [8,9,10], in enhancing the Cherenkov radiation by moving charges with no velocity threshold [11,12], in providing a giant radiative heat transfer [13], and even in quantum electrodynamics in the framework of the Casimir effect, such that the Casimir interaction in a nanowire background can lead to ultra-long range forces [14,15].…”

Section: Introductionmentioning

confidence: 99%

Effective medium response of metallic nanowire arrays with a Kerr-type dielectric host

Silveirinha

2013

Phys. Rev. B

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We derive an effective medium model to characterize the macroscopic electromagnetic response of metallic nanowire arrays embedded in a host dielectric with a Kerr-type nonlinear permittivity function. It is shown that the macroscopic electromagnetic fields are coupled to the conduction current in the nanowires and to an additional quasi-static potential through a system of nonlinear equations. We prove that a weak nonlinearity leads to an electromagnetic response closer to that of an indefinite medium, and to isofrequency contours with increased hyperbolicity. For high-field intensities the negative refraction of electromagnetic waves at an air − nanowire material interface is enhanced when the nanowires are embedded in a self-focusing Kerr medium.

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Mimicking Boyer’s Casimir repulsion with a nanowire material

Cited by 31 publications

References 46 publications

Purcell effect in wire metamaterials

Purcell effect in wire metamaterials

Repulsive Casimir and Casimir–Polder forces

Effective medium response of metallic nanowire arrays with a Kerr-type dielectric host

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