Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.1134/S1028335821030010
Ключевые слова: bandpass filter, complex permittivity, composite, metal nanoparticles
Аннотация: Abstract: The frequency and concentration dependences of the effective complex permittivity of a composite consisting of silver nanoparticles in a polystyrene dielectric matrix have been investigated. It has been found that, with an increase in the volume concentration of particles in the composite to ~33%, the real part of its perПоказать полностьюmittivity increases from 2.6 to ~103, while the loss tangent remains no higher than 10–2 up to a frequency of 1 THz. We show the possibility of designing bandpass filters based on composite layered structures, which can be tuned by selecting the particle concentration in the quarter-wavelength layers of the mirrors that ensure the optimal interaction of half-wavelength resonators with each other and the outer resonators with free space. The high contrast between the matrix and the composite permittivities makes it possible to create mirrors with a required reflectivity using a minimum number of layers. © 2021, Pleiades Publishing, Ltd. Abstract: The frequency and concentration dependences of the effective complex permittivity of a composite consisting of silver nanoparticles in a polystyrene dielectric matrix have been investigated. It has been found that, with an increase in the volume concentration of particles in the composite to ~33%, the real part of its permittivity increases from 2.6 to ~103, while the loss tangent remains no higher than 10–2 up to a frequency of 1 THz. We show the possibility of designing bandpass filters based on composite layered structures, which can be tuned by selecting the particle concentration in the quarter-wavelength layers of the mirrors that ensure the optimal interaction of half-wavelength resonators with each other and the outer resonators with free space. The high contrast between the matrix and the composite permittivities makes it possible to create mirrors with a required reflectivity using a minimum number of layers. © 2021, Pleiades Publishing, Ltd.
Журнал: Doklady Physics
Выпуск журнала: Vol. 66, Is. 3
Номера страниц: 59-63
ISSN журнала: 10283358
Издатель: Pleiades journals