Cited by 141Metamaterials and Metasurfaces ApplicationsTerahertz technology and applicationsLaser-Matter Interactions and Applications

Functional THz emitters based on Pancharatnam-Berry phase nonlinear metasurfaces

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McDonnell, Cormac, Deng, Junhong, Sideris, Symeon, Ellenbogen, Tal, Li, Guixin·2021·Nature Communications

Abstract

Recent advances in the science and technology of THz waves show promise for a wide variety of important applications in material inspection, imaging, and biomedical science amongst others. However, this promise is impeded by the lack of sufficiently functional THz emitters. Here, we introduce broadband THz emitters based on Pancharatnam-Berry phase nonlinear metasurfaces, which exhibit unique optical functionalities. Using these new emitters, we experimentally demonstrate tunable linear polarization of broadband single cycle THz pulses, the splitting of spin states and THz frequencies in the spatial domain, and the generation of few-cycle pulses with temporal polarization dispersion. Finally, we apply the ability of spin control of THz waves to demonstrate circular dichroism spectroscopy of amino acids. Altogether, we achieve nanoscale and all-optical control over the phase and polarization states of the emitted THz waves.

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Crossref · 10.1038/s41467-020-20283-0

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  • Rotating the incident light polarization by 90° leads to rotation of the THz polarization with respect to the incident light polarization; equivalently, rotating the resonator structure by 90° rotates the THz polarization by 90°.

    “Rotating the incident light polarization by leads to rotation of the THz polarization with respect to the incident light polarization207 (Fig. 9d). Equivalently, rotating the resonator structure by results in the rotation of the THz polarization by .”
  • Recent experimental work demonstrated that a linear spatial profile of the Pancharatnam-Berry phase, by successively rotating the orientation of split-ring and three-petal resonators, enabled spatial separation of left- and right-handed circular polarization components over the entire frequency range of the generated THz radiation.

    “Recent experimental work has demonstrated that a linear spatial profile of the PB phase by successively rotating the orientation of SRR208 (Fig. 9e) and three-petal207 resonators enabled the spatial separation of the left- and right-handed circular polarization components over the entire frequency range of the generated THz radiation.”

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Authors
McDonnell, C., Deng, J., Sideris, S., Ellenbogen, T., & Li, G.
Affiliations
  • Tel Aviv University (IL)
  • Southern University of Science and Technology (CN)
Corresponding author
  • Ellenbogen, Tal
  • Li, Guixin
Venue
Nature Communications
Published
2021-01-04
Volume
12
Issue
1
Pages
30-30
ISSN
2041-1723 (ISSN-L)
OpenAlex
W3118804118
Cited by
141
References
40
Citations by year
2026: 17 · 2025: 26 · 2024: 22 · 2023: 35 · 2022: 28 · 2021: 13
FWCI
5.97
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • European Commission (HORIZON2020, 715362)
  • National Natural Science Foundation of China (91950114, 11774145, 2017ZT07C071)
Topics
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Metamaterials and Metasurfaces Applications
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
Keywords
terahertz sources, Berry phase, nonlinear metasurfaces, few-cycle pulses, circular dichroism spectroscopy, amino acids, polarization control

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