Surface acoustic waves to monitor active THz metagrating based on VO2
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866915662952136704 |
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| author | Karapetyan, G. Y. Ochkurov, M. V. Kaydashev, V. E. |
| author_facet | Karapetyan, G. Y. Ochkurov, M. V. Kaydashev, V. E. |
| contents | We theoretically propose a new approach to in-situ monitor the altered states of pixels in VO2 based active THz amplitude metagrating by using surface acoustic waves (SAWs) generated in LiNbO3 substrate. A single broadband RF response of the SAW device consists of N narrowband frequency channels which code the feedback information on the current pixels states. This way the resistance alteration due to metal-to-insulator transition of all VO2 based pixels of the active THz grating is monitored in advance even without incident radiation. The method provides important new options of monitoring a metasurface aging as well as incorrect switching related to technological defects. Using of the SAW device in all-electrically addressed VO2 based binary grating with tunable period as well as advanced gradient type gratings are modeled. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_01210 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Surface acoustic waves to monitor active THz metagrating based on VO2 Karapetyan, G. Y. Ochkurov, M. V. Kaydashev, V. E. Optics Applied Physics We theoretically propose a new approach to in-situ monitor the altered states of pixels in VO2 based active THz amplitude metagrating by using surface acoustic waves (SAWs) generated in LiNbO3 substrate. A single broadband RF response of the SAW device consists of N narrowband frequency channels which code the feedback information on the current pixels states. This way the resistance alteration due to metal-to-insulator transition of all VO2 based pixels of the active THz grating is monitored in advance even without incident radiation. The method provides important new options of monitoring a metasurface aging as well as incorrect switching related to technological defects. Using of the SAW device in all-electrically addressed VO2 based binary grating with tunable period as well as advanced gradient type gratings are modeled. |
| title | Surface acoustic waves to monitor active THz metagrating based on VO2 |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2412.01210 |