Terahertz Modulator Based on Vertically Coupled Fano Metamaterial
Open accessAbstract
We introduce a vertical coupling concept to Fano resonance based terahertz (THz) metamaterials, in order to enhance their modulation characteristics. The approach is demonstrated for an asymmetric split-ring structure fabricated from gold with standard micromachining processes on a fused silica substrate. The realized samples are characterized with THz time-domain spectroscopy and the results are in close agreement with the simulation model. Due to the enhanced field concentration facilitated by vertical coupling, we achieve a 95% modulation depth and 35% resonance frequency tunability at 1.23 THz with less than 1-dB inherent loss. The exemplary device shows vertical coupling as an attractive concept for designing efficient modulators for terahertz imaging applications.
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Metasurfaces are spreading use in the THz range, e.g., as narrowband modulators or light-matter interaction enhancers.
“Metasurfaces are spreading their use in the THz range, for example as narrowband terahertz modulators [55] or light-matter interaction enhancers [56].”
From THz-TDS Time-Trace Analysis for the Extraction of Material and Metamaterial Parameters (2019) · cites this paper as [55]
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References 37 · Cited by 17
Research works printed but not linked: 3
- Z. Zhou, S. Wang, Y. Yu, Y. Chen, and L. Feng, "High perfor- mance metamaterials-high electron mobility transistors integrated ter- ahertz modulator," Opt. Express, vol. 25, no. 15, pp. 17832-17840, 2017.
- E. Hecht, Optics, 4th ed. Reading, MA, USA: Addison-Wesley, 2002, pp. 116-120.
- Tuan Anh Pham Tran was born in Hanoi, Vietnam, in 1984. He received the B.Sc. degree in engineer- ing physics from the Vietnam National University of Hanoi, Hanoi, Vietnam, in 2007, and the M.Sc. degree in optics and photonics from the Karlsruhe Institute of Technology, Karlsruhe, Germany, in 2014. From 2008 to 2012, he was a Researcher with the National Centre for Technological Progress, Hanoi, where he was engaged in research on industrial laser systems. In 2015, he joined the Institute for High Frequency and Quantum Electronics, University of Siegen, Siegen, Germany, where he is currently involved in the development of terahertz components and systems. Peter Haring Bolívar (M'02) was born in Mexico City, Mexico, in 1969. He received the degree in elec- trical engineering from RWTH Aachen University, Aachen, Germany, in 1992. From 1992 to 1993, he was the Head of the Res- cue Equipment Division, Nautica Diesel Europea, Mexico City. From 1993 to 1996, he was a Scien- tific Assistant with the Institut für Halbleitertechnik II, RWTH Aachen, where he was involved with con- jugated polymers and femtosecond dynamics in semi- conductors. From 1997 to 2001, he was the Head of ultrahigh-frequency research with the Institut of Semiconductor Electronics, RWTH Aachen. From 2001 to 2004, he was the Head of research at this insti- tution with activities in the fields of optoelectronics, ultrafast science, ultrahigh frequency devices, optical data storage, and nanotechnology. Since 2004, he has been the Head of the Institute for High Frequency and Quantum Electron- ics, University of Siegen, Siegen, Germany. In 2008, he additionally became the Vice-Rector for Research of this university. Since 2014, he has been repre- senting all the European universities in the ESIF structured dialogue group of the European Commission. He holds 9 patents, 5 book contributions, and has authored or co-authored more than 100 peer-review publications and more than 150 international conference contributions.
- Authors
- Tran, T. A. P., & Bolivar, P. H.
- Affiliations
- University of Siegen (DE)
- Venue
- IEEE Transactions on Terahertz Science and Technology
- Published
- 2018-09
- Volume
- 8
- Issue
- 5
- Pages
- 502-508
- ISSN
- 2156-342X (ISSN-L)
- 2156-3446
- OpenAlex
- W2883104672
- Cited by
- 17
- References
- 37
- Citations by year
- 2026: 1 · 2024: 2 · 2022: 3 · 2021: 2 · 2020: 5 · 2019: 2 · 2018: 2
- FWCI
- 0.82
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- IEEE Transactions on Terahertz Science and Technology (publishedVersion)
- Funders
- DFG
- 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 modulators, Fano resonance, metamaterials, vertical coupling, split ring resonator, gold nanostructures, modulation depth, terahertz imaging
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