Two Types of Localized States in a Photonic Crystal Bounded by an Epsilon Near Zero Nanocomposite

The spectral properties of a one-dimensional photonic crystal bounded by a resonant absorbing nanocomposite layer with the near-zero permittivity have been studied. The problem of calculating the transmittance, reflectance, and absorptance spectra of such structures at the normal and oblique incidence of light has been solved. It is shown that, depending on the permittivity sign near zero, the nanocomposite is characterized by either metallic or dielectric properties. For the first time, the possibility of simultaneous formation of the Tamm plasmon polariton at the photonic crystal/metallic nanocomposite interface and the localized state similar to the defect mode with the field intensity maximum inside the dielectric nanocomposite layer is demonstrated. Specific features of field localization at the Tamm plasmon polariton and defect mode frequencies are analyzed.

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Two Types of Localized States in a Photonic Crystal Bounded by an Epsilon near Zero Nanocomposite

Photonics ◽

10.3390/photonics5030022 ◽

2018 ◽

Vol 5 (3) ◽

pp. 22 ◽

Cited By ~ 7

Author(s):

Rashid Bikbaev ◽

Stepan Vetrov ◽

Ivan Timofeev

Keyword(s):

Photonic Crystal ◽

Defect Mode ◽

Localized States ◽

Intensity Maximum ◽

Simultaneous Formation ◽

One Dimensional ◽

Nanocomposite Layer ◽

Localized State ◽

Plasmon Polariton ◽

Field Localization

The spectral properties of a one-dimensional photonic crystal bounded by a resonant absorbing nanocomposite layer with the near-zero permittivity have been studied. The problem of calculating the transmittance, reflectance, and absorptance spectra of such structures at the normal and oblique incidence of light has been solved. It is shown that, depending on the permittivity sign near zero, the nanocomposite is characterized by either metallic or dielectric properties. The possibility of simultaneous formation of the Tamm plasmon polariton at the photonic crystal/metallic nanocomposite interface and the localized state similar to the defect mode with the field intensity maximum inside the dielectric nanocomposite layer is demonstrated. Specific features of field localization at the Tamm plasmon polariton and defect mode frequencies are analyzed.

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Локализация возбуждений в слоистой структуре с границами раздела, характеризующимися нелинейным откликом

Физика твердого тела ◽

10.21883/ftt.2019.03.47253.288 ◽

2019 ◽

Vol 61 (3) ◽

pp. 571

Author(s):

С.Е. Савотченко

Keyword(s):

Surface Waves ◽

Nonlinear Response ◽

Layer Structure ◽

Localized States ◽

Frequency Range ◽

One Dimensional ◽

Localized State ◽

Symmetric Structure ◽

The Media ◽

Field Localization

AbstractThe features of localization of excitations in a three-layer structure in which linear media are separated by boundaries with their own nonlinear response have been examined. It is shown that in the three-layer structure under consideration, localized states of two types can exist that differ in the distribution of the field in the inner layer, as well as in the frequency range of existence. Dispersion relations have been obtained that determine the energy dependence on system parameters in each case. The damping factors of surface waves are obtained in an explicit form. The conditions of the field localization are specified, depending on the characteristics of the layers and their interfaces. The energies of localized states have been found that do not exist in a symmetric structure without a wave interacting with the interfaces of the layers. Moreover, the presence of a nonlinear response of the boundaries is mandatory. It is shown that the interaction of a wave with the interfaces of the layers can lead to the absence of a localized state in a one-dimensional symmetric potential well with infinitely high walls and a nonlinear response. The influence of the media parameters and their interfaces on the flux carried by surface waves has been analyzed.

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