Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Current Optics and Photonics
  • Vol. 1,
  • Issue 6,
  • pp. 637-641
  • (2017)

Accurate Measurement of THz Dielectric Constant Using Metamaterials on a Quartz Substrate

Open Access Open Access

Abstract

We present dielectric constant measurements of thin films using THz metamaterials fabricated on a quartz substrate. The resonance shifts of the metamaterials exhibit saturation behavior with increasing film thickness. The saturation frequency shift varies with the real part of the dielectric constant, from which the numerical expression for the particular metamaterial design was extracted. We first performed finite-difference time-domain simulations to find an explicit relationship between the saturated frequency shift and the dielectric constant of a thin film, which was confirmed by the experimental results from conventional techniques. In particular, the quartz substrate enables us to determine their values more accurately, because of its low substrate index. As a result, we extracted the dielectric constants of various films whose values have not been addressed previously without precise control of the film thickness.

© 2017 Optical Society of Korea

PDF Article
More Like This
Humidity sensing using THz metamaterial with silk protein fibroin

Hwan Sik Kim, Sung Ho Cha, Biswajit Roy, Sunghwan Kim, and Y. H. Ahn
Opt. Express 26(26) 33575-33581 (2018)

Sensing viruses using terahertz nano-gap metamaterials

S. J. Park, S. H. Cha, G. A. Shin, and Y. H. Ahn
Biomed. Opt. Express 8(8) 3551-3558 (2017)

Terahertz metamaterial sensing on polystyrene microbeads: shape dependence

S. J. Park, S. W. Jun, A. R. Kim, and Y. H. Ahn
Opt. Mater. Express 5(10) 2150-2155 (2015)

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.


Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved