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Title: A tunable metamaterial dependent on electric field at terahertz with barium strontium titanate thin film

A tunable metamaterial with resonance frequency at terahertz (THz) was developed. Electromagnetic response of the metamaterial was characterized with THz time domain spectrometer at various direct current electric fields. The resonance frequency increased monotonously with increasing electric field. The finite difference time domain method was used to simulate the transmission spectra of the metamaterial at THz frequencies. By comparing the simulated resonance frequency with the experimental curve, dielectric property of the Ba{sub 0.6}Sr{sub 0.4}TiO{sub 3} (BST60) thin film at THz, over 0–33 kV/cm, was evaluated.
Authors:
;  [1] ; ;  [2]
  1. Function Materials Research Laboratory, Tongji University, Shanghai 200092 (China)
  2. Department of Physics Science and Engineering, Tongji University, Shanghai 200092 (China)
Publication Date:
OSTI Identifier:
22280536
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTRA; BARIUM COMPOUNDS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; DIELECTRIC PROPERTIES; DIRECT CURRENT; ELECTRIC FIELDS; FINITE DIFFERENCE METHOD; RESONANCE; STRONTIUM TITANATES; THIN FILMS; THZ RANGE