Loading...
Search for:
abbaszadeh--a
0.009 seconds
Achieving subwavelength field confinement in sub-terahertz regime by periodic metallodielectric waveguides
, Article Optics Express ; Volume 27, Issue 4 , 2019 , Pages 4226-4237 ; 10944087 (ISSN) ; Ahmadi Boroujeni, M ; Abbaszadeh, A ; Sharif University of Technology
OSA - The Optical Society
2019
Abstract
In this paper, we report on a periodic metallo-dielectric structure that supports geometry-induced surface plasmons in the sub-terahertz regime. The proposed structure is made up of a dielectric-coated metallic grating sandwiched by parallel metal plates. Based on the modal analysis of 2D and 3D structures, the impact of a metal cladding and a customized dielectric coating on the dispersion relation and field distribution of the guided surface wave is investigated. It is found that modal field confinement is improved in the presence of a metal cladding without narrowing the operational bandwidth of the waveguide. Moreover, a customized subwavelength-sized dielectric coating based on...
Achieving subwavelength field confinement in sub-terahertz regime by periodic metallodielectric waveguides
, Article Optics Express ; Volume 27, Issue 4 , 2019 , Pages 4226-4237 ; 10944087 (ISSN) ; Ahmadi Boroujeni, M ; Abbaszadeh, A ; Sharif University of Technology
OSA - The Optical Society
2019
Abstract
In this paper, we report on a periodic metallo-dielectric structure that supports geometry-induced surface plasmons in the sub-terahertz regime. The proposed structure is made up of a dielectric-coated metallic grating sandwiched by parallel metal plates. Based on the modal analysis of 2D and 3D structures, the impact of a metal cladding and a customized dielectric coating on the dispersion relation and field distribution of the guided surface wave is investigated. It is found that modal field confinement is improved in the presence of a metal cladding without narrowing the operational bandwidth of the waveguide. Moreover, a customized subwavelength-sized dielectric coating based on...
Waveguiding characteristics of a metal-clad dielectric grating for terahertz applications
, Article Optics Communications ; Volume 476 , 2020 ; Ahmadi Boroujeni, M ; Abbaszadeh, A ; Sharif University of Technology
Elsevier B.V
2020
Abstract
Dielectric gratings (DGs) have recently been introduced as a new platform for guiding dielectric-based geometrically-induced surface plasmons (SPs) called spoof SPs (SSPs). In this paper, we report on the modal analysis of a metal-clad DG waveguide and compare its performance with other counterparts including the dielectric image guide (IG) and the metal grating (MG) waveguide. The proposed DG waveguide is made up of a periodic array of high-resistivity silicon (HR-Si) pillars on a metal plate with a metal cladding at a proper distance above the structure. By modal analysis of 2D and 3D structures, we show that the presence of the metal cladding enhances the modal field confinement without...