Тип публикации: статья из журнала
Год издания: 2016
Идентификатор DOI: 10.1088/2040-8978/18/6/065106
Ключевые слова: photonic crystal, nanocomposite, optical Tamm state, shelled nanoparticles, effective permittivity, Absorption spectroscopy, Energy gap, Metallic matrix composites, Microcomputers, Nanocomposites, Nanoparticles, Natural frequencies, Permittivity, Photonic crystals, Resonance, Surface states, Incident light waves, Plasmon resonance frequencies, Resonance frequencies, Spherical nanoparticles, Transmission spectrums, Visible spectral range, Interface states
Аннотация: We investigate the optical Tamm states (OTSs) localized at the interface between a photonic crystal (PC) and a nanocomposite consisting of spherical nanoparticles with a dielectric core and a metallic shell, which are dispersed in a transparent matrix, and is characterized by the resonance permittivity. Spectra of transmission, reflection, and absorption of normally incident light waves by the investigated structure are calculated. The spectral manifestation of the Tamm states caused by negative values of the real part of the effective permittivity in the visible spectral range is studied. It is demonstrated that, along with the significantly extended band gap of the PC, the transmission spectrum contains an additional stopband caused by nanocomposite absorption near the resonance frequency. It is shown that the OTSs can be implemented in two band gaps of the PCs, each corresponding to a certain plasmon resonance frequency of the nanocomposite. It is established that the characteristics of the Tamm state localized at the edge of the PCs significantly depend on the ratio between the particle core volume and the total particle volume.
Журнал: JOURNAL OF OPTICS
Выпуск журнала: Vol. 18, Is. 6
ISSN журнала: 20408978
Место издания: BRISTOL
Издатель: IOP PUBLISHING LTD
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