FEM Simulation of Frequency-Selective Surface Based on Thermoelectric Bi-Sb Thin Films for THz Detection
Terahertz (THz) filters and detectors can find a wide application in such fields as: sensing, imaging, security systems, medicine, wireless connection, and detection of substances. Thermoelectric materials are promising basis for THz detectors’ development due to their sensitivity to the THz radiati...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/8/4/119 |
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| author | Anastasiia Tukmakova Ivan Tkhorzhevskiy Artyom Sedinin Aleksei Asach Anna Novotelnova Natallya Kablukova Petr Demchenko Anton Zaitsev Dmitry Zykov Mikhail Khodzitsky |
| author_facet | Anastasiia Tukmakova Ivan Tkhorzhevskiy Artyom Sedinin Aleksei Asach Anna Novotelnova Natallya Kablukova Petr Demchenko Anton Zaitsev Dmitry Zykov Mikhail Khodzitsky |
| author_sort | Anastasiia Tukmakova |
| collection | DOAJ |
| description | Terahertz (THz) filters and detectors can find a wide application in such fields as: sensing, imaging, security systems, medicine, wireless connection, and detection of substances. Thermoelectric materials are promising basis for THz detectors’ development due to their sensitivity to the THz radiation, possibility to be heated under the THz radiation and produce voltage due to Seebeck effect. Thermoelectric thin films of Bi-Sb solid solutions are semimetals/semiconductors with the band gap comparable with THz energy and with high thermoelectric conversion efficiency at room temperature. Detecting film surface can be transformed into a periodic frequency selective surface (FSS) that can operate as a frequency filter and increases the absorption of THz radiation. We report for the first time about the simulation of THz detector based on thermoelectric Bi-Sb thin-filmed frequency-selective surface. We show that such structure can be both detector and frequency filter. Moreover, it was shown that FSS design increases not only a heating due to absorption but a temperature gradient in Bi-Sb film by two orders of magnitude in comparison with continuous films. Local temperature gradients can reach the values of the order of 100 K·mm<sup>−1</sup>. That opens new perspectives for thin-filmed thermoelectric detectors’ efficiency increase. Temperature difference formed due to THz radiation absorption can reach values on the order of 1 degree. Frequency-transient calculations show the power dependence of film temperature on time with characteristic saturation at times around several ms. That points to the perspective of reaching fast response times on such structures. |
| first_indexed | 2024-03-10T12:25:46Z |
| format | Article |
| id | doaj.art-179abe35270d4b1d98e0d399b5497f40 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T12:25:46Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-179abe35270d4b1d98e0d399b5497f402023-11-21T15:03:05ZengMDPI AGPhotonics2304-67322021-04-018411910.3390/photonics8040119FEM Simulation of Frequency-Selective Surface Based on Thermoelectric Bi-Sb Thin Films for THz DetectionAnastasiia Tukmakova0Ivan Tkhorzhevskiy1Artyom Sedinin2Aleksei Asach3Anna Novotelnova4Natallya Kablukova5Petr Demchenko6Anton Zaitsev7Dmitry Zykov8Mikhail Khodzitsky9Faculty of Energy and Ecotechnology, ITMO University, 197101 St. Petersburg, RussiaFaculty of Energy and Ecotechnology, ITMO University, 197101 St. Petersburg, RussiaFaculty of Energy and Ecotechnology, ITMO University, 197101 St. Petersburg, RussiaFaculty of Energy and Ecotechnology, ITMO University, 197101 St. Petersburg, RussiaFaculty of Energy and Ecotechnology, ITMO University, 197101 St. Petersburg, RussiaFaculty of Energy and Ecotechnology, ITMO University, 197101 St. Petersburg, RussiaTerahertz Biomedicine Laboratory, ITMO University, 197101 St. Petersburg, RussiaTerahertz Biomedicine Laboratory, ITMO University, 197101 St. Petersburg, RussiaTerahertz Biomedicine Laboratory, ITMO University, 197101 St. Petersburg, RussiaTerahertz Biomedicine Laboratory, ITMO University, 197101 St. Petersburg, RussiaTerahertz (THz) filters and detectors can find a wide application in such fields as: sensing, imaging, security systems, medicine, wireless connection, and detection of substances. Thermoelectric materials are promising basis for THz detectors’ development due to their sensitivity to the THz radiation, possibility to be heated under the THz radiation and produce voltage due to Seebeck effect. Thermoelectric thin films of Bi-Sb solid solutions are semimetals/semiconductors with the band gap comparable with THz energy and with high thermoelectric conversion efficiency at room temperature. Detecting film surface can be transformed into a periodic frequency selective surface (FSS) that can operate as a frequency filter and increases the absorption of THz radiation. We report for the first time about the simulation of THz detector based on thermoelectric Bi-Sb thin-filmed frequency-selective surface. We show that such structure can be both detector and frequency filter. Moreover, it was shown that FSS design increases not only a heating due to absorption but a temperature gradient in Bi-Sb film by two orders of magnitude in comparison with continuous films. Local temperature gradients can reach the values of the order of 100 K·mm<sup>−1</sup>. That opens new perspectives for thin-filmed thermoelectric detectors’ efficiency increase. Temperature difference formed due to THz radiation absorption can reach values on the order of 1 degree. Frequency-transient calculations show the power dependence of film temperature on time with characteristic saturation at times around several ms. That points to the perspective of reaching fast response times on such structures.https://www.mdpi.com/2304-6732/8/4/119THz frequency rangethermoelectricFEM simulationsensordetectorfilter |
| spellingShingle | Anastasiia Tukmakova Ivan Tkhorzhevskiy Artyom Sedinin Aleksei Asach Anna Novotelnova Natallya Kablukova Petr Demchenko Anton Zaitsev Dmitry Zykov Mikhail Khodzitsky FEM Simulation of Frequency-Selective Surface Based on Thermoelectric Bi-Sb Thin Films for THz Detection Photonics THz frequency range thermoelectric FEM simulation sensor detector filter |
| title | FEM Simulation of Frequency-Selective Surface Based on Thermoelectric Bi-Sb Thin Films for THz Detection |
| title_full | FEM Simulation of Frequency-Selective Surface Based on Thermoelectric Bi-Sb Thin Films for THz Detection |
| title_fullStr | FEM Simulation of Frequency-Selective Surface Based on Thermoelectric Bi-Sb Thin Films for THz Detection |
| title_full_unstemmed | FEM Simulation of Frequency-Selective Surface Based on Thermoelectric Bi-Sb Thin Films for THz Detection |
| title_short | FEM Simulation of Frequency-Selective Surface Based on Thermoelectric Bi-Sb Thin Films for THz Detection |
| title_sort | fem simulation of frequency selective surface based on thermoelectric bi sb thin films for thz detection |
| topic | THz frequency range thermoelectric FEM simulation sensor detector filter |
| url | https://www.mdpi.com/2304-6732/8/4/119 |
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