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.

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  1. H. T. Chen, W. J. Padilla, R. D. Averitt, A. C. Gossard, C. Highstrete, M. Lee, J. F. O’Hara, and A. J. TaylorElectromagnetic metamaterials for terahertz applicationsTerahertz Sci. Technol.200814250
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  3. S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. AhnDetection of microorganisms using terahertz metamaterialsSci. Rep.201444988
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  6. R. A. Shelby, D. R. Smith, and S. SchultzExperimental verification of a negative index of refractionSci.20012927779
  7. S. J. Park, B. H. Son, S. J. Choi, H. S. Kim, and Y. H. AhnSensitive detection of yeast using terahertz slot antennasOpt. Express2014223046730472
  8. S. J. Park, S. H. Cha, G. A. Shin, and Y. H. AhnSensing viruses using terahertz nano-gap metamaterialsBiomed. Opt. Express2017835513558
  9. A. P. Tenggara, S. J. Park, H. T. Yudistira, Y. H. Ahn, and D. ByunFabrication of terahertz metamaterials using electrohydrodynamic jet printing for sensitive detection of yeastJ. Micromech. Microeng201727
  10. S. J. Park, S. W. Jun, A. R. Kim, and Y. H. AhnTerahertz metamaterial sensing on polystyrene microbeads: Shape dependenceOpt. Mater. Express2015521502155
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  13. K. Kawase, Y. Ogawa, Y. Watanabe, and H. InoueNon-destructive terahertz imaging of illicit drugs using spectral fingerprintsOpt. Express20031125492554
  14. A. Menikh, R. MacColl, C. A. Mannella, and X. C. ZhangTerahertz biosensing technology: Frontiers and progressChemphyschem20023655658
  15. M. TonouchiCutting-edge terahertz technologyNat. Photon.2007197105
  16. R. Woodward, V. Wallace, D. Arnone, E. Linfield, and M. PepperTerahertz pulsed imaging of skin cancer in the time and frequency domainJ. Biol. Phys.200329257259
  17. S. J. Park, S. A. N. Yoon, and Y. H. AhnDielectric constant measurements of thin films and liquids using terahertz metamaterialsRSC Adv.201666938169386
  18. S. J. Park, S. A. N. Yoon, and Y. H. AhnEffective sensing volume of terahertz metamaterial with various gap widthsJ. Opt. Soc. Korea201620628632
  19. J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J. Y. Park, S. Lee, and Y. H. AhnTerahertz conductivity of reduced graphene oxide filmsOpt. Express20132176337640
  20. S. J. Park, A. R. Kim, J. T. Hong, J. Y. Park, S. Lee, and Y. H. AhnCrystallization kinetics of lead halide perovskite film monitored by in-situ terahertz spectroscopyJ. Phys. Chem. Lett.20178401406

Other (20)

H. T. Chen, W. J. Padilla, R. D. Averitt, A. C. Gossard, C. Highstrete, M. Lee, J. F. O’Hara, and A. J. TaylorElectromagnetic metamaterials for terahertz applicationsTerahertz Sci. Technol.200814250

H. T. Chen, W. J. Padilla, J. M. O. Zide, A. C. Gossard, A. J. Taylor, and R. D. AverittActive terahertz meta-material devicesNat.2006444597600

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. AhnDetection of microorganisms using terahertz metamaterialsSci. Rep.201444988

J. B. Pendry, A. J. Holden, D. Robbins, and W. StewartMagnetism from conductors and enhanced nonlinear phenomenaIEEE Trans. Microw. Theory19994720752084

J. B. Pendry, D. Schurig, and D. R. SmithControlling electromagnetic fieldsSci.200631217801782

R. A. Shelby, D. R. Smith, and S. SchultzExperimental verification of a negative index of refractionSci.20012927779

S. J. Park, B. H. Son, S. J. Choi, H. S. Kim, and Y. H. AhnSensitive detection of yeast using terahertz slot antennasOpt. Express2014223046730472

S. J. Park, S. H. Cha, G. A. Shin, and Y. H. AhnSensing viruses using terahertz nano-gap metamaterialsBiomed. Opt. Express2017835513558

A. P. Tenggara, S. J. Park, H. T. Yudistira, Y. H. Ahn, and D. ByunFabrication of terahertz metamaterials using electrohydrodynamic jet printing for sensitive detection of yeastJ. Micromech. Microeng201727

S. J. Park, S. W. Jun, A. R. Kim, and Y. H. AhnTerahertz metamaterial sensing on polystyrene microbeads: Shape dependenceOpt. Mater. Express2015521502155

J. F. O'Hara, R. Singh, I. Brener, E. Smirnova, J. Han, A. J. Taylor, and W. ZhangThin-film sensing with planar terahertz metamaterials: sensitivity and limitationsOpt. Express20081617861795

D. J. Shelton, D. W. Peters, M. B. Sinclair, I. Brener, L. K. Warne, L. I. Basilio, K. R. Coffey, and G. D. BoremanEffect of thin silicon dioxide layers on resonant frequency in infrared metamaterialsOpt. Express20101810851090

K. Kawase, Y. Ogawa, Y. Watanabe, and H. InoueNon-destructive terahertz imaging of illicit drugs using spectral fingerprintsOpt. Express20031125492554

A. Menikh, R. MacColl, C. A. Mannella, and X. C. ZhangTerahertz biosensing technology: Frontiers and progressChemphyschem20023655658

M. TonouchiCutting-edge terahertz technologyNat. Photon.2007197105

R. Woodward, V. Wallace, D. Arnone, E. Linfield, and M. PepperTerahertz pulsed imaging of skin cancer in the time and frequency domainJ. Biol. Phys.200329257259

S. J. Park, S. A. N. Yoon, and Y. H. AhnDielectric constant measurements of thin films and liquids using terahertz metamaterialsRSC Adv.201666938169386

S. J. Park, S. A. N. Yoon, and Y. H. AhnEffective sensing volume of terahertz metamaterial with various gap widthsJ. Opt. Soc. Korea201620628632

J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J. Y. Park, S. Lee, and Y. H. AhnTerahertz conductivity of reduced graphene oxide filmsOpt. Express20132176337640

S. J. Park, A. R. Kim, J. T. Hong, J. Y. Park, S. Lee, and Y. H. AhnCrystallization kinetics of lead halide perovskite film monitored by in-situ terahertz spectroscopyJ. Phys. Chem. Lett.20178401406

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