Terahertz Displacement Sensing Based on Interface States of Hetero-Structures Article Swipe
Lanlan Xu
,
Ya-Xian Fan
,
Huan Liu
,
Tao Zhang
,
Zhi-Yong Tao
·
YOU?
·
· 2020
· Open Access
·
· DOI: https://doi.org/10.3390/electronics9081213
YOU?
·
· 2020
· Open Access
·
· DOI: https://doi.org/10.3390/electronics9081213
Herein, we propose a nano displacement sensor based on the interface state of a terahertz hetero-structure waveguide. The waveguide consists of two periodically corrugated metallic tubes with different duty ratios, which can result in similar forbidden bands in their frequency spectra. It was found that the topological properties of these forbidden bands are different, and the hetero-structure can be formed by connecting these two waveguides. In the hetero-structure waveguide, the interface state of an extraordinary transmission can always arise within the former forbidden bands, the peak frequency of which is highly dependent on the cavity length at the interface of the two periodic waveguides. So, by carefully designing the structure’s topological property, the hetero-structure waveguide can be efficiently used to produce a displacement sensor in the THz frequency range. The simulations show that the resolution of the displacement can be as small as 90 nm and the sensitivity can reach over 1.2 GHz/μm. Such a sensitive interface state of the proposed hetero-structure waveguide will greatly benefit THz applications of functional devices, including not only displacement sensors but also switches with high extinction ratios, tunable narrow-band filters, and frequency division multiplexers.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/electronics9081213
- https://www.mdpi.com/2079-9292/9/8/1213/pdf?version=1595929486
- OA Status
- gold
- Cited By
- 4
- References
- 46
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W3045912856
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W3045912856Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3390/electronics9081213Digital Object Identifier
- Title
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Terahertz Displacement Sensing Based on Interface States of Hetero-StructuresWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2020Year of publication
- Publication date
-
2020-07-28Full publication date if available
- Authors
-
Lanlan Xu, Ya-Xian Fan, Huan Liu, Tao Zhang, Zhi-Yong TaoList of authors in order
- Landing page
-
https://doi.org/10.3390/electronics9081213Publisher landing page
- PDF URL
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https://www.mdpi.com/2079-9292/9/8/1213/pdf?version=1595929486Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
- OA URL
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https://www.mdpi.com/2079-9292/9/8/1213/pdf?version=1595929486Direct OA link when available
- Concepts
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Terahertz radiation, Waveguide, Displacement (psychology), Optics, Materials science, Multiplexer, Optoelectronics, Physics, Multiplexing, Electronic engineering, Engineering, Psychotherapist, PsychologyTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
4Total citation count in OpenAlex
- Citations by year (recent)
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2025: 1, 2023: 2, 2021: 1Per-year citation counts (last 5 years)
- References (count)
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46Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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