Anomalous Wavelength Scaling of Tightly Coupled Terahertz Metasurfaces

Ji Hun Kang; Seo Joo Lee; Bong Joo Kang; Won Tae Kim; Fabian Rotermund; Q. Han Park

doi:10.1021/acsami.8b05806

Anomalous Wavelength Scaling of Tightly Coupled Terahertz Metasurfaces

Ji Hun Kang, Seo Joo Lee, Bong Joo Kang, Won Tae Kim, Fabian Rotermund, Q. Han Park

Department of Physics

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

9 Citations (Scopus)

Abstract

We theoretically and experimentally demonstrate the drastic changes in the wavelength scaling of tightly coupled metasurfaces caused by deep subwavelength variations in the distance between the unit resonators but no change in the length scale of the units themselves. This coupling-dependent wavelength scaling is elucidated by our model metasurfaces of ring resonators arranged with deep subwavelength lattice spacing g, and we show that narrower g results in rapider changes in wavelength scaling. Also, by using terahertz time-domain spectroscopy, we experimentally observed a significant shift of the spectral response arising from very small variations in lattice spacing, confirming our theoretical predictions.

Original language	English
Pages (from-to)	19331-19335
Number of pages	5
Journal	ACS Applied Materials and Interfaces
Volume	10
Issue number	23
DOIs	https://doi.org/10.1021/acsami.8b05806
Publication status	Published - 2018 Jun 13

Bibliographical note

Funding Information:
This work was supported by the Center for Advanced Meta-Materials (CAMM) funded by the Ministry of Science, ICT and Future Planning as Global Frontier Project (CAMM-2014M3A6B3063710). J. H. Kang was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2018R1C1B6009007). B.J.K., W.T.K., and F.R. acknowledge support from NRF funded by the Korea government (MSIP) (2017R1A4A1015426).

Publisher Copyright:
© 2018 American Chemical Society.

Keywords

metamaterials
metasurfaces
resonators
scaling effect
terahertz spectroscopy

ASJC Scopus subject areas

Materials Science(all)

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10.1021/acsami.8b05806

Cite this

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title = "Anomalous Wavelength Scaling of Tightly Coupled Terahertz Metasurfaces",

abstract = "We theoretically and experimentally demonstrate the drastic changes in the wavelength scaling of tightly coupled metasurfaces caused by deep subwavelength variations in the distance between the unit resonators but no change in the length scale of the units themselves. This coupling-dependent wavelength scaling is elucidated by our model metasurfaces of ring resonators arranged with deep subwavelength lattice spacing g, and we show that narrower g results in rapider changes in wavelength scaling. Also, by using terahertz time-domain spectroscopy, we experimentally observed a significant shift of the spectral response arising from very small variations in lattice spacing, confirming our theoretical predictions.",

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note = "Funding Information: This work was supported by the Center for Advanced Meta-Materials (CAMM) funded by the Ministry of Science, ICT and Future Planning as Global Frontier Project (CAMM-2014M3A6B3063710). J. H. Kang was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2018R1C1B6009007). B.J.K., W.T.K., and F.R. acknowledge support from NRF funded by the Korea government (MSIP) (2017R1A4A1015426). Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

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AU - Kim, Won Tae

AU - Rotermund, Fabian

AU - Park, Q. Han

N1 - Funding Information: This work was supported by the Center for Advanced Meta-Materials (CAMM) funded by the Ministry of Science, ICT and Future Planning as Global Frontier Project (CAMM-2014M3A6B3063710). J. H. Kang was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2018R1C1B6009007). B.J.K., W.T.K., and F.R. acknowledge support from NRF funded by the Korea government (MSIP) (2017R1A4A1015426). Publisher Copyright: © 2018 American Chemical Society.

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AB - We theoretically and experimentally demonstrate the drastic changes in the wavelength scaling of tightly coupled metasurfaces caused by deep subwavelength variations in the distance between the unit resonators but no change in the length scale of the units themselves. This coupling-dependent wavelength scaling is elucidated by our model metasurfaces of ring resonators arranged with deep subwavelength lattice spacing g, and we show that narrower g results in rapider changes in wavelength scaling. Also, by using terahertz time-domain spectroscopy, we experimentally observed a significant shift of the spectral response arising from very small variations in lattice spacing, confirming our theoretical predictions.

KW - metamaterials

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KW - resonators

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Anomalous Wavelength Scaling of Tightly Coupled Terahertz Metasurfaces

Abstract

Bibliographical note

Keywords

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