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Title: Polarization-dependent thin-film wire-grid reflectarray for terahertz waves

A thin-film polarization-dependent reflectarray based on patterned metallic wire grids is realized at 1 THz. Unlike conventional reflectarrays with resonant elements and a solid metal ground, parallel narrow metal strips with uniform spacing are employed in this design to construct both the radiation elements and the ground plane. For each radiation element, a certain number of thin strips with an identical length are grouped to effectively form a patch resonator with equivalent performance. The ground plane is made of continuous metallic strips, similar to conventional wire-grid polarizers. The structure can deflect incident waves with the polarization parallel to the strips into a designed direction and transmit the orthogonal polarization component. Measured radiation patterns show reasonable deflection efficiency and high polarization discrimination. Utilizing this flexible device approach, similar reflectarray designs can be realized for conformal mounting onto surfaces of cylindrical or spherical devices for terahertz imaging and communications.
Authors:
 [1] ;  [2] ; ; ;  [3] ;  [1] ;  [4] ; ; ;  [1]
  1. School of Electrical and Electronic Engineering, The University of Adelaide, Adelaide, South Australia 5005 (Australia)
  2. (China)
  3. Functional Materials and Microsystems Research Group, RMIT University, Melbourne, Victoria 3001 (Australia)
  4. (Japan)
Publication Date:
OSTI Identifier:
22486326
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMMUNICATIONS; DESIGN; EFFICIENCY; GRIDS; METALS; PERFORMANCE; POLARIZATION; RESONATORS; SOLIDS; SURFACES; THIN FILMS