Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling
We have presented the results of terahertz time-domain spectroscopy measurements and a rigorous electrodynamic modeling of the optical characteristics of grating-based AlGaN/GaN plasmonic structures with low-doped two-dimensional electron gas in the frequency range of 0.1...1.5 THz. Two samples with...
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| Date: | 2019 |
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| Main Authors: | , , , , , , , |
| Format: | Article |
| Language: | English |
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Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2019
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/215459 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling / V.V. Korotyeyev, Yu.M. Lyaschuk, V.A. Kochelap, L. Varani, D. Coquillat, S.В. Danylyuk, S.В. Brose, S.A. Vitusevich // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2019. — Т. 22, № 2. — С. 237-251. — Бібліогр.: 43 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862575445687402496 |
|---|---|
| author | Korotyeyev, V.V. Lyaschuk, Yu.M. Kochelap, V.A. Varani, L. Coquillat, D. Danylyuk, S.В. Brose, S.В. Vitusevich, S.A. |
| author_facet | Korotyeyev, V.V. Lyaschuk, Yu.M. Kochelap, V.A. Varani, L. Coquillat, D. Danylyuk, S.В. Brose, S.В. Vitusevich, S.A. |
| citation_txt | Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling / V.V. Korotyeyev, Yu.M. Lyaschuk, V.A. Kochelap, L. Varani, D. Coquillat, S.В. Danylyuk, S.В. Brose, S.A. Vitusevich // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2019. — Т. 22, № 2. — С. 237-251. — Бібліогр.: 43 назв. — англ. |
| collection | DSpace DC |
| description | We have presented the results of terahertz time-domain spectroscopy measurements and a rigorous electrodynamic modeling of the optical characteristics of grating-based AlGaN/GaN plasmonic structures with low-doped two-dimensional electron gas in the frequency range of 0.1...1.5 THz. Two samples with grating aspect ratios (strip width/period) of 2.4/3 and 1.2/1.5 µm have been investigated. The measured transmission spectra are reconstructed in the calculations with high accuracy. The transmission spectra for p-polarized incident radiation exhibit Fabry–Pérot oscillation behavior due to the optically thick substrate. The specific values of amplitude and spectral position of the transmission maxima are associated with the coupling of terahertz radiation with a 2D electron gas due to plasmon excitations. Both calculations and transmission/reflection measurements demonstrate that plasmonic structures with micro-scaled metallic grating have a three-fold increase of non-resonant absorption of terahertz radiation in comparison with the bare heterostructure. The polarization measurements of the transmission spectra of the plasmonic structures agree well with calculations and indicate a well-pronounced filtering effect of the grating for the s-component of the incident electromagnetic wave. The obtained values of the transmission for p- and s-polarized incident radiation demonstrate the high quality of the deposited metallic grating, with the extinction ratio higher than 80:1 for the sub- and few THz frequency range.
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| first_indexed | 2026-03-23T18:52:32Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-215459 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1560-8034 |
| language | English |
| last_indexed | 2026-03-23T18:52:32Z |
| publishDate | 2019 |
| publisher | Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| record_format | dspace |
| spelling | Korotyeyev, V.V. Lyaschuk, Yu.M. Kochelap, V.A. Varani, L. Coquillat, D. Danylyuk, S.В. Brose, S.В. Vitusevich, S.A. 2026-03-18T11:38:08Z 2019 Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling / V.V. Korotyeyev, Yu.M. Lyaschuk, V.A. Kochelap, L. Varani, D. Coquillat, S.В. Danylyuk, S.В. Brose, S.A. Vitusevich // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2019. — Т. 22, № 2. — С. 237-251. — Бібліогр.: 43 назв. — англ. 1560-8034 PACS: 85.60.-q, 07.57-c, 42.25.Bs, 42.79.Pw https://nasplib.isofts.kiev.ua/handle/123456789/215459 https://doi.org/10.15407/spqeo22.02.237 We have presented the results of terahertz time-domain spectroscopy measurements and a rigorous electrodynamic modeling of the optical characteristics of grating-based AlGaN/GaN plasmonic structures with low-doped two-dimensional electron gas in the frequency range of 0.1...1.5 THz. Two samples with grating aspect ratios (strip width/period) of 2.4/3 and 1.2/1.5 µm have been investigated. The measured transmission spectra are reconstructed in the calculations with high accuracy. The transmission spectra for p-polarized incident radiation exhibit Fabry–Pérot oscillation behavior due to the optically thick substrate. The specific values of amplitude and spectral position of the transmission maxima are associated with the coupling of terahertz radiation with a 2D electron gas due to plasmon excitations. Both calculations and transmission/reflection measurements demonstrate that plasmonic structures with micro-scaled metallic grating have a three-fold increase of non-resonant absorption of terahertz radiation in comparison with the bare heterostructure. The polarization measurements of the transmission spectra of the plasmonic structures agree well with calculations and indicate a well-pronounced filtering effect of the grating for the s-component of the incident electromagnetic wave. The obtained values of the transmission for p- and s-polarized incident radiation demonstrate the high quality of the deposited metallic grating, with the extinction ratio higher than 80:1 for the sub- and few THz frequency range. This work is supported by the Ministry of Education and Science of Ukraine (Project M/24-2018), by the German Federal Ministry of Education and Research (BMBF Project 01DK17028), by the Occitanie region via the Gepeto Terahertz platform, and by the Doctoral Training Network in Terahertz Technologies for Imaging, Radar and Communication Applications, TeraApps (H2020-MSCA-ITN-2017, grant number 765426). en Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України Semiconductor Physics Quantum Electronics & Optoelectronics Optoelectronics and optoelectronic devices Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling Article published earlier |
| spellingShingle | Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling Korotyeyev, V.V. Lyaschuk, Yu.M. Kochelap, V.A. Varani, L. Coquillat, D. Danylyuk, S.В. Brose, S.В. Vitusevich, S.A. Optoelectronics and optoelectronic devices |
| title | Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling |
| title_full | Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling |
| title_fullStr | Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling |
| title_full_unstemmed | Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling |
| title_short | Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling |
| title_sort | interaction of sub-terahertz radiation with low-doped grating-based algan/gan plasmonic structures. time-domain spectroscopy measurements and electrodynamic modeling |
| topic | Optoelectronics and optoelectronic devices |
| topic_facet | Optoelectronics and optoelectronic devices |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/215459 |
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