Abstract
The article explores possibilities and conditions of generation of a new type of diffraction-free needle-like field Bessel plasmon polaritons (BPPs) with super narrow cone angle in an epsilon-near-zero metamaterial, surrounded by semi-infinite dielectric media. Correct analytical expressions are obtained and analyzed in detail for the electric and magnetic fields of BPPs formed inside and outside the metamateral slab.
Highlights
Recent advances in nanofabrication and developments in the theory of light-matter interaction have brought to life a new class of c omposite media, known as metamaterials (MMs)
We considered the hyperbolic metamaterial made of metallic nanocylinders periodically embedded in th e dielectric template matrix, having the thickness h (Fig.1), surrounded by an external isotropic medium with the dielectric permittivity ε1
As it follows from Eq (8) the electric vector of the field of Bessel plasmon polaritons (BPPs) in dielectric medium near t he exit surface of e psilon-near-zero metamaterials (ENZMs) slab is d ependent on th e transmission coefficient t determining by the following expression at kze ≈ 0 : t
Summary
Recent advances in nanofabrication and developments in the theory of light-matter interaction have brought to life a new class of c omposite media, known as metamaterials (MMs). The main properties of Bessel light beams are th e ability to keep the transverse size o f the central lobe unchanged much longer than the Rayleigh range and to restore the wave front behind an obstacle Owing to these features BLBs are promising for a number of applications, for example, for optical trapping and manipulation of microparticles and atoms, and f or technical diagnostics of subjects with a sub-wave resolution [19,20,21,22]. The present report considers the peculiarities of generation of Bessel plasmon polaritons in epsilon-near-zero metamaterials Investigation of this problem attracts interest owing to a possibility to combine unusual features of BPPs and ENZMs. The paper is structured as follows.
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