SFM-FDTD analysis of triangular-lattice AAA structure: Parametric study of the TEM mode

• Published in: Optics communications Vol. 318; pp. 47 - 52
• Main Authors: Hamidi, M., Chemrouk, C., Belkhir, A., Kebci, Z., Ndao, A., Lamrous, O., Baida, F.I.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-05-2014; Elsevier
• Subjects: AAA structure; Apertures; Arrays; Devices; Engineering Sciences; Finite difference method; Optics; Photonic; Photonic crystal; Physics; SFM-FDTD; Spectra; TEM mode; Three dimensional; Transmission electron microscopy; Triangular lattice; Unit cell; Triangular lattice; AAA structure; TEM mode; SFM-FDTD; Photonic crystal
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2013.12.051

This theoretical work reports a parametric study of enhanced transmission through annular aperture array (AAA) structure arranged in a triangular lattice. The effect of the incidence angle in addition to the inner and outer radii values on the evolution of the transmission spectra is carried out. To this end, a 3D Finite-Difference Time-Domain code based on the Split Field Method (SFM) is used to calculate the spectral response of the structure for any angle of incidence. In order to work through an orthogonal unit cell which presents the advantage to reduce time and space of computation, special periodic boundary conditions are implemented. This study provides a new modeling of AAA structures useful for producing tunable ultra-compact devices.