Frequency Response of a Ferroelectric Material in Double-Negative Region

Meng Ru Wu, Heng Tung Hsu, Chien Jang Wu, Shoou-Jinn Chang

研究成果: Article

摘要

In this work, we investigate the far-infrared wave properties for a ferroelectric material, i.e., lithium tantalate (LiTaO3), in the double-negative region, i.e., both the real parts of permittivity and permeability are negative. The analysis has been done based on the calculated surface impedances for three model structures, i.e., material occupying semi-infinite space (structure I), material of a slab immersed in free space (structure II), and a layered structure made of film on a dielectric substrate (structure III). It is found that the surface impedance spectrum exhibits resonant behavior. In structure I, there are only two resonant points, which arise mainly from the pole of permeability and the zero of permittivity. In structure II, multiple resonances can be found, and they strongly rely on the film thickness. Finally, we specifically investigate the substrate resonant phenomenon in structure III.

原文English
文章編號2201711
期刊IEEE Photonics Journal
6
發行號5
DOIs
出版狀態Published - 2014 十月 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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