Tamm plasmon modes on semi-infinite metallodielectric superlattices

Abstract

We analyze the fundamental properties of optical waves referred to as Tamm plasmon modes (TPMs) which are tied to the interface of a semi-infinite two-phase metallodielectric superlattice with an arbitrary homogeneous capping medium. Such modes offer new ways of achieving high electromagnetic field localization and spontaneous emission enhancement in the vicinity of the interface in conjunction with absorption loss management, which is crucial for future applications. The homointerface, formed when the capping medium has the same permittivity as one of the superlattice constituents, is found to support a TPM whose dispersion overlaps the single-interface surface plasmon polariton (SPP) dispersion but which has a cut off at the topological transition point. In contrast, a heterointerface formed for an arbitrary capping medium, is found to support multiple TPMs whose origin can be traced by considering the interaction between a single-interface SPP and the homointerface TPM burried under the top layer of the superlattice. By carrying out a systematic comparison between TPMs and single-interface SPPs, we find that the deviations are most pronounced in the vicinity of the transition frequency for superlattices in which dielectric layers are thicker than metallic ones.

Nonequilibrium atom-surface interaction with lossy multilayer structures

“…We notice that, under the condition of validity of the EMA, this behavior is essentially related with the location of the ω ± -branches, establishing a direct connection with the CIPP [55]. Interestingly, this offers another perspective on the features we observe in r I (ω).…”

MXenes as Alternative Plasmonic Coatings on 1D Photonic Crystals Platforms for Tamm Plasmon Polaritons

“…Contemporary nanophotonic structures often combine all-dielectric structures and plasmonic materials, frequently in the form of planar nanocomposites. They support the existence of different optical modes (guided propagating modes [7], evanescent surface modes such as surface plasmon polaritons [8], Dyakonov waves [9], optical Tamm states (OTS) [10,11], Bloch surface modes [12], etc.) and base their functions on the behavior of such modes [13].…”

Methods of decreasing losses in optical metamaterials

“…Examples of TCO include ITOindium-tin-oxide; AZOaluminum-zinc-oxide; GZOgallium-zincoxide. Recently, however, it has been noted that the quoted properties come for a price and that the TCO figure of merit (the ratio of the real by imaginary part of the refractive index) reaches rather poor values, even worse than in noble metals they are intended to replace [7].…”

“…Bragg reflection in a hyperbolic photonic crystal (d~λ 0 ) leads to the appearance of optical Tamm surface states [7]. In hypercrystals the formation of PBGs (photonic bandgaps) persists in the subwavelength mode (metamaterial regime, d<<λ 0 )…”

“…In its basic form such a surface wave is obtained by coupling free electron plasma in the metal part with the P-polarized electromagnetic wave at the interface between semi-infinite dielectric and semi-infinite metal. Depending on geometry of the nanocomposite and its constituent materials, a host of different waves can appear at the surface and in the bulk [6][7][8]. The strong localization of the electromagnetic field at the surface lies in the root of many exotic optical phenomena connected with plasmonic metamaterials.…”