Cited by 76Metamaterials and Metasurfaces ApplicationsTerahertz technology and applicationsPlasmonic and Surface Plasmon Research

Integrated Terahertz Generator-Manipulators Using Epsilon-near-Zero-Hybrid Nonlinear Metasurfaces

Lu, Yongchang, Feng, Xi, Wang, Qingwei, Zhang, Xueqian, Fang, Ming, Sha, Wei E.I., Huang, Zhixiang, Xu, Quan +9 more·2021·Nano Letters

Abstract

In terahertz (THz) technologies, generation and manipulation of THz waves are two key processes usually implemented by different device modules. Integrating THz generation and manipulation into a single compact device will advance the applications of THz technologies in various fields. Here, we demonstrate a hybrid nonlinear plasmonic metasurface incorporating an epsilon-near-zero (ENZ) indium tin oxide (ITO) layer to seamlessly combine efficient generation and manipulation of THz waves across a wide frequency band. The coupling between the plasmonic resonance of the metasurface and the ENZ mode of the ITO thin film enhances the THz conversion efficiency by more than 4 orders of magnitude. Meanwhile, such a hybrid device is capable of shaping the polarization and wavefront of the emitted THz beam via the engineered nonlinear Pancharatnam-Berry (PB) phases of the plasmonic meta-atoms. The presented hybrid nonlinear metasurface opens a new avenue toward miniaturized integrated THz devices and systems with advanced functionalities.

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Crossref · 10.1021/acs.nanolett.1c02372

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  • In a split-ring resonator excited by circularly polarized light, the rotation angle of the THz linear polarization is 90° and does not depend on the handedness of the excitation light.

    “In the case of SRR excited by circularly polarized light, the rotation angle of the THz linear polarization is and it does not depend on the handedness of the excitation light208.”
  • Coupling to the epsilon-near-zero mode in ITO films can significantly influence the efficiency of THz generation and can allow efficient generation of THz radiation at s-polarized excitation in split-ring resonators.

    “recent experimental works have revealed that the coupling to the epsilon-near-zero (ENZ) mode in ITO films can have a significant influence on the efficiency of THz generation, and even allow the efficient generation of THz radiation at -polarized excitation in SRRs208,215”
  • 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
Lu, Y., Feng, X., Wang, Q., Zhang, X., Fang, M., Sha, W. E. I., Huang, Z., Xu, Q., Niu, L., Chen, X., Ouyang, C., Yang, Y., Zhang, X., Plum, E., Zhang, S., Han, J., & Zhang, W.
Affiliations
  • Tianjin University (CN)
  • Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University and the Key Laboratory of Optoelectronics Information and Technology (Ministry of Education), Tianjin 300072, China
  • Anhui University (CN)
  • Zhejiang University (CN)
  • Tsinghua University (CN)
  • University of Southampton (GB)
  • University of Hong Kong (HK)
  • Oklahoma State University (US)
Corresponding author
  • Zhang, Xueqian
  • Fang, Ming
  • Zhang, Shuang
  • Han, Jiaguang
Venue
Nano Letters
Published
2021-09-09
Volume
21
Issue
18
Pages
7699-7707
ISSN
  • 1530-6984 (ISSN-L)
  • 1530-6992
OpenAlex
W3198616592
Cited by
76
References
55
Citations by year
2026: 6 · 2025: 8 · 2024: 8 · 2023: 35 · 2022: 18 · 2021: 1
FWCI
3.78
Type
journal article
Language
en
Open access
closed
Locations
  • Nano Letters (publishedVersion)
  • PubMed (publishedVersion)
  • ePrints Soton (University of Southampton) (acceptedVersion)
  • King Abdullah University of Science and Technology Repository (King Abdullah University of Science and Technology) (submittedVersion)
Funders
  • Engineering and Physical Sciences Research Council (EP/M009122/1, EP/T02643X/1)
  • Research Grants Council, University Grants Committee (AoE/P-701/20)
  • Ministry of Science and Technology of the People's Republic of China (2017YFA0701004)
  • National Natural Science Foundation of China (11974259, 61735012, 61875150, 61901001, 61935015, 61971001, 61975177, 62005193, 62025504, 62075158, U20A20164)
  • Tianjin Municipal Fund for Distinguished Young Scholars (18JCJQJC45600)
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 › Engineering › Biomedical Engineering › Plasmonic and Surface Plasmon Research
Keywords
terahertz generation, terahertz wave manipulation, epsilon-near-zero, indium tin oxide, hybrid metasurfaces, Berry phase, polarization control, wavefront shaping, meta-atoms

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