Abstract: The French-German research institute in Saint-Louis is a bi-national institution providing innovative scientific solutions for defence and security applications. The research topics which are investigated include novel high-power laser sources, novel energetic materials, and aerodynamics. An increasing focus on protection technologies reflects the recent developments in France and many other European countries. New […]
Assoc. Prof. T. Matsui, Active terahertz and microwave metamaterials utilizing organic π-conjugated materials, Friday 23rd October 2015.
Abstract: In recent years, metamaterials are actively studied since novel optical functionalities cannot be accessible by nature materials come to real. To develop active metamaterials is one of extensively studied topics and we are working on developing active terahertz (THz) and microwave metamaterials utilizing organic π-conjugated materials. In this talk, I will show our […]
Abstract: A resonant element consisting of three parallel elliptical dipoles is proposed for the design of a broadband reﬂectarray at 1 THz. The phase response of the proposed radiating element is reasonably linear and its gradient is constant over a wide frequency range. A subarray composed of 4 radiating elements with a progressive phase […]
Abstract: A reﬂectarray is designed and demonstrated experimentally for polarization-dependent beam splitting at 1 THz. This reﬂective component is composed of two sets of orthogonal strip dipoles arranged into interlaced triangular lattices over a ground plane. By varying the length and width of the dipoles a polarization-dependent localized phase change is achieved on reﬂection, allowing […]
Research Seminar 21st August, Mr. D. Headland – Dielectric hole lattice for terahertz diffractive optics with high transmission
Abstract: A dielectric hole lattice is proposed for creating diffractive optics in the terahertz range. An array of sub-wavelength air-holes in a dielectric material gives rise to an artificial dielectric, with refractive index depending on hole radius. The design uses low-loss dielectric materials, and exploits a half-wavelength etalon effect to minimise reflection, leading to […]