The cylindrical column lenses and reflectors made of transverse an-isotropic plasma and dielectrics and their response to presence of plane electromagnetic waves

نویسندگانسعیده گلهرانی دارانی,بهرام جزی,ابراهیم حیدری,زینب رحمانی نوش آبادی
نشریهOPTIK
ضریب تاثیر (IF)ثبت نشده
نوع مقالهFull Paper
تاریخ انتشار2021-05-21
رتبه نشریهعلمی - پژوهشی
نوع نشریهالکترونیکی
کشور محل چاپایران
نمایه نشریهJCR

چکیده مقاله

In this paper, a long column lens with circular cross section made of two transversely non-isotropic parts (dielectric and plasma ) covered by isotropic dielectric layer, is studied. The response of the mentioned object to presence of plane monochromatic electromagnetic waves will be investigated. The finite element method (FEM) have been used to calculate the field equations and the amplitudes of scattered wave in this research. This structure can be purposefully used as a device to focus electromagnetic wave energy in a specific area that its operation will be discussed by scattering theory. The electromagnetically responses of this structure have been simulated for two modes TE, TM of the incident wave, separately. Since in this lens a plasma region exist, therefore the plasma can be considered as transparent or non-transparent states, with variations of plasma frequency in a fixed incident wave frequency. Here we consider the mentioned states too.

tags: Cylindrical reflectors Non-isotropic dielectric rod Binary cylindrical structures FEM method Cold plasma Main focal Secondary focal