An electrically driven terahertz metamaterial diffractive modulator with more than 20 dB of dynamic range

We design and experimentally demonstrate a switchable diffraction grating for terahertz modulation based on planar active metamaterials, where a Schottky gate structure is implemented to tune the metamaterial resonances in real-time via the application of an external voltage bias. The diffraction gr...

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Published in:Applied physics letters 2014-03, Vol.104 (9)
Main Authors: Karl, N., Reichel, K., Chen, H.-T., Taylor, A. J., Brener, I., Benz, A., Reno, J. L., Mendis, R., Mittleman, D. M.
Format: Article
Language:English
Subjects:
Applied physics
Columns (structural)
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DESIGN
DIFFRACTION
DIFFRACTION GRATINGS
Dynamic range
ELECTRIC POTENTIAL
Gratings (spectra)
Metamaterials
MODULATION
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
RESONATORS
THZ RANGE
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cited_by cdi_FETCH-LOGICAL-c320t-b96ece32a40e93f0730ddbaba6eea3dec9908e8ffebcfb56556cc3fef65e1a563
cites cdi_FETCH-LOGICAL-c320t-b96ece32a40e93f0730ddbaba6eea3dec9908e8ffebcfb56556cc3fef65e1a563
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container_issue 9
container_start_page
container_title Applied physics letters
container_volume 104
creator Karl, N.
Reichel, K.
Chen, H.-T.
Taylor, A. J.
Brener, I.
Benz, A.
Reno, J. L.
Mendis, R.
Mittleman, D. M.
description We design and experimentally demonstrate a switchable diffraction grating for terahertz modulation based on planar active metamaterials, where a Schottky gate structure is implemented to tune the metamaterial resonances in real-time via the application of an external voltage bias. The diffraction grating is formed by grouping the active split-ring resonators into an array of independent columns with alternate columns biased. We observe off-axis diffraction over a wide frequency band in contrast to the narrow-band resonances, which permits operation of the device as a relatively high-speed, wide-bandwidth, high-contrast modulator, with more than 20 dB of dynamic range.
doi_str_mv 10.1063/1.4867276
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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP_美国物理联合会现刊（与NSTL共建）
subjects Applied physics
Columns (structural)
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DESIGN
DIFFRACTION
DIFFRACTION GRATINGS
Dynamic range
ELECTRIC POTENTIAL
Gratings (spectra)
Metamaterials
MODULATION
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
RESONATORS
THZ RANGE
title An electrically driven terahertz metamaterial diffractive modulator with more than 20 dB of dynamic range
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