Extraordinary electromagnetic transmission through a circular aperture surrounded by surface corrugations

• Published in: IET microwaves, antennas & propagation Vol. 8; no. 3; pp. 145 - 157
• Main Authors: Na, Dong Yeop, Kim, Ji Hyung, Park, Yong Bae, Jung, Kyung-Young
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 01.02.2014; Institution of Engineering and Technology; The Institution of Engineering & Technology
• Subjects: Apertures; Applied classical electromagnetism; boundary conditions; circular aperture; conducting plane; Conduction; continuous mode; Corrugating; Corrugation; corrugation geometries; discrete mode; eigenfunction expansion; eigenvalues and eigenfunctions; electromagnetic boundary‐value problem; Electromagnetic transmission; Electromagnetic wave propagation, radiowave propagation; electromagnetic wave scattering; Electromagnetism; electron and ion optics; Exact sciences and technology; extraordinary electromagnetic transmission; Fundamental areas of phenomenology (including applications); Gratings; Hankel transform; Hankel transforms; Mathematical analysis; mode matching; mode matching method; Optical elements, devices, and systems; Optics; Physics; radiated fields; scattered fields; Simultaneous equations; Surface corrugation; surface corrugations; transmission coefficient; Hankel transforms; scattered fields; mode matching method; conducting plane; radiated fields; surface corrugations; transmission coefficient; discrete mode; circular aperture; eigenvalues and eigenfunctions; electromagnetic wave scattering; Hankel transform; extraordinary electromagnetic transmission; corrugation geometries; continuous mode; eigenfunction expansion; mode matching; electromagnetic boundary-value problem; boundary conditions; Electromagnetism; Corrugated surface; Optical transmission; Series expansion; Groove; Boundary conditions; Eigenfunctions; Boundary-value problems; Modelling; Enhanced transmission
• ISSN: 1751-8725; 1751-8733; 1751-8733
• DOI: 10.1049/iet-map.2013.0391

The authors investigate extraordinary electromagnetic transmission through a circular aperture surrounded by surface corrugations. An electromagnetic boundary-value problem of a circular aperture surrounded by surface corrugations in a conducting plane is solved based on the mode matching method. The eigenfunction expansion and Hankel transform are used to represent the scattered fields in terms of the discrete and continuous modes, respectively. The boundary conditions are enforced to obtain a set of simultaneous equations. The transmission coefficient and the radiated fields are represented in a fast-convergent series. Computation is performed to illustrate the behaviours of transmission and radiation against the corrugation geometries. The effects of the corrugation geometries on the extraordinary electromagnetic transmission are discussed.