Active metamaterial polarization modulators for the Terahertz frequency range
Authors
Kindness, Stephen J.
Almond, Nikita W.
Michailow, Wladislaw
Wei, Binbin
Braeuninger-Weimer, Philipp
Hofmann, Stephan
Beere, Harvey E.
Ritchie, David A.
Degl’Innocenti, Riccardo
Publication Date
2020-07Journal Title
Journal of Physics: Conference Series
ISSN
1742-6588
Publisher
IOP Publishing
Volume
1571
Issue
1
Language
en
Type
Article
This Version
VoR
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Kindness, S. J., Almond, N. W., Michailow, W., Wei, B., Braeuninger-Weimer, P., Hofmann, S., Beere, H. E., et al. (2020). Active metamaterial polarization modulators for the Terahertz frequency range. Journal of Physics: Conference Series, 1571 (1)https://doi.org/10.1088/1742-6596/1571/1/012003
Abstract
Abstract: Active control of chirality in the terahertz frequency range is of great importance in many scientific areas, which include research into fundamental optical phenomena, investigation of novel materials, spectroscopy, imaging, wireless communications and chemistry. The lack of efficient, integrated and fast-reconfigurable polarization modulators has hindered, so far, the full exploitation of applications in all the aforementioned fields. Metamaterials are artificial resonant elements possessing unique remarkable properties such as high efficiency and miniaturization capability. The interplay of metallic metamaterial arrays with electrostatically tunable monolayer graphene has been demonstrated to be a valid approach for the realization of a novel class of THz devices. In this work, the realization of active chiral graphene/metamaterial modulator is presented. The versatility of this experimental approach allowed the device integration with broadband sources such as terahertz time domain spectrometers as well as with quantum cascade lasers. A continuous rotation of the polarization plane > 30° has been reported with a reconfiguration speed > 5 MHz. These results pave the way to the integration of fast terahertz polarization modulators in all the applications where these devices are in great demand.
Keywords
Paper
Identifiers
jpcs_1571_1_012003, j15711003
External DOI: https://doi.org/10.1088/1742-6596/1571/1/012003
This record's URL: https://www.repository.cam.ac.uk/handle/1810/308790
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Licence:
http://creativecommons.org/licenses/by/3.0/