Active terahertz metamaterials: Nano-slot antennas on VO2 thin films

J. S. Kyoung; M. A. Seo; S. M. Koo; H. R. Park; H. S. Kim; B. J. Kim; H. T. Kim; N. K. Park; D. S. Kim; K. J. Ahn

doi:10.1002/pssc.201000803

Active terahertz metamaterials: Nano-slot antennas on VO₂ thin films

J. S. Kyoung, M. A. Seo, S. M. Koo, H. R. Park, H. S. Kim, B. J. Kim, H. T. Kim, N. K. Park, D. S. Kim, K. J. Ahn

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

We demonstrate a broadband metamaterial based on nano-slot antenna on a VO₂ thin film, which transforms itself from transparent to completely extinct over a broad spectrum when the underlying VO₂ thin film makes Mott-insulator-to-metal phase transition. Our structure, long wavelength nano resonators inspired by log-periodic antenna, has 2 terahertz (THz) wide spectral range with 10,000: 1 extinction ratio through thermal and photo excitation. Two of the most important demands for present metamaterials research, broadband operation and full transmission/extinction control, are met in our metamaterial. Our structure enables nano-scale thin film technology to fully enter into long wavelength applications, and we foresee a wide range of applications in areas where perfect modulation, giant nonlinearity, switching, and filtering in broad THz bands are desired.

Original language	English (US)
Pages (from-to)	1227-1230
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	8
Issue number	4
DOIs	https://doi.org/10.1002/pssc.201000803
State	Published - Apr 2011
Externally published	Yes

Keywords

Metamaterial
Slot antennas
Sub-wavelength optics
Terahertz
Vanadium dioxide

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title = "Active terahertz metamaterials: Nano-slot antennas on VO2 thin films",

abstract = "We demonstrate a broadband metamaterial based on nano-slot antenna on a VO2 thin film, which transforms itself from transparent to completely extinct over a broad spectrum when the underlying VO2 thin film makes Mott-insulator-to-metal phase transition. Our structure, long wavelength nano resonators inspired by log-periodic antenna, has 2 terahertz (THz) wide spectral range with 10,000: 1 extinction ratio through thermal and photo excitation. Two of the most important demands for present metamaterials research, broadband operation and full transmission/extinction control, are met in our metamaterial. Our structure enables nano-scale thin film technology to fully enter into long wavelength applications, and we foresee a wide range of applications in areas where perfect modulation, giant nonlinearity, switching, and filtering in broad THz bands are desired.",

keywords = "Metamaterial, Slot antennas, Sub-wavelength optics, Terahertz, Vanadium dioxide",

author = "Kyoung, {J. S.} and Seo, {M. A.} and Koo, {S. M.} and Park, {H. R.} and Kim, {H. S.} and Kim, {B. J.} and Kim, {H. T.} and Park, {N. K.} and Kim, {D. S.} and Ahn, {K. J.}",

year = "2011",

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doi = "10.1002/pssc.201000803",

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AU - Kyoung, J. S.

AU - Seo, M. A.

AU - Koo, S. M.

AU - Park, H. R.

AU - Kim, H. S.

AU - Kim, B. J.

AU - Kim, H. T.

AU - Park, N. K.

AU - Kim, D. S.

AU - Ahn, K. J.

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AB - We demonstrate a broadband metamaterial based on nano-slot antenna on a VO2 thin film, which transforms itself from transparent to completely extinct over a broad spectrum when the underlying VO2 thin film makes Mott-insulator-to-metal phase transition. Our structure, long wavelength nano resonators inspired by log-periodic antenna, has 2 terahertz (THz) wide spectral range with 10,000: 1 extinction ratio through thermal and photo excitation. Two of the most important demands for present metamaterials research, broadband operation and full transmission/extinction control, are met in our metamaterial. Our structure enables nano-scale thin film technology to fully enter into long wavelength applications, and we foresee a wide range of applications in areas where perfect modulation, giant nonlinearity, switching, and filtering in broad THz bands are desired.

KW - Metamaterial

KW - Slot antennas

KW - Sub-wavelength optics

KW - Terahertz

KW - Vanadium dioxide

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