Terahertz Cross-Correlation Spectroscopy and Imaging of Large-Area Graphene
We demonstrate the use of a novel, integrated THz system to obtain time-domain signals for spectroscopy in the 0.1–1.4 THz range. The system employs THz generation in a photomixing antenna excited by a broadband amplified spontaneous emission (ASE) light source and THz detection with a photoconducti...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/6/3297 |
| _version_ | 1797609051494809600 |
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| author | Bjørn Hübschmann Mølvig Thorsten Bæk Jie Ji Peter Bøggild Simon Jappe Lange Peter Uhd Jepsen |
| author_facet | Bjørn Hübschmann Mølvig Thorsten Bæk Jie Ji Peter Bøggild Simon Jappe Lange Peter Uhd Jepsen |
| author_sort | Bjørn Hübschmann Mølvig |
| collection | DOAJ |
| description | We demonstrate the use of a novel, integrated THz system to obtain time-domain signals for spectroscopy in the 0.1–1.4 THz range. The system employs THz generation in a photomixing antenna excited by a broadband amplified spontaneous emission (ASE) light source and THz detection with a photoconductive antenna by coherent cross-correlation sampling. We benchmark the performance of our system against a state-of-the-art femtosecond-based THz time-domain spectroscopy system in terms of mapping and imaging of the sheet conductivity of large-area graphene grown by chemical vapor deposition (CVD) and transferred to a PET polymer substrate. We propose to integrate the algorithm for the extraction of the sheet conductivity with the data acquisition, thereby enabling true in-line monitoring capability of the system for integration in graphene production facilities. |
| first_indexed | 2024-03-11T05:55:10Z |
| format | Article |
| id | doaj.art-41619dce088041fabc15946fc0b0f3b3 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T05:55:10Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-41619dce088041fabc15946fc0b0f3b32023-11-17T13:48:44ZengMDPI AGSensors1424-82202023-03-01236329710.3390/s23063297Terahertz Cross-Correlation Spectroscopy and Imaging of Large-Area GrapheneBjørn Hübschmann Mølvig0Thorsten Bæk1Jie Ji2Peter Bøggild3Simon Jappe Lange4Peter Uhd Jepsen5Department of Electrical and Photonics Engineering, Technical University of Denmark, 2800 Kongens Lyngby, DenmarkDepartment of Electrical and Photonics Engineering, Technical University of Denmark, 2800 Kongens Lyngby, DenmarkDepartment of Physics, Technical University of Denmark, 2800 Kongens Lyngby, DenmarkDepartment of Physics, Technical University of Denmark, 2800 Kongens Lyngby, DenmarkDepartment of Electrical and Photonics Engineering, Technical University of Denmark, 2800 Kongens Lyngby, DenmarkDepartment of Electrical and Photonics Engineering, Technical University of Denmark, 2800 Kongens Lyngby, DenmarkWe demonstrate the use of a novel, integrated THz system to obtain time-domain signals for spectroscopy in the 0.1–1.4 THz range. The system employs THz generation in a photomixing antenna excited by a broadband amplified spontaneous emission (ASE) light source and THz detection with a photoconductive antenna by coherent cross-correlation sampling. We benchmark the performance of our system against a state-of-the-art femtosecond-based THz time-domain spectroscopy system in terms of mapping and imaging of the sheet conductivity of large-area graphene grown by chemical vapor deposition (CVD) and transferred to a PET polymer substrate. We propose to integrate the algorithm for the extraction of the sheet conductivity with the data acquisition, thereby enabling true in-line monitoring capability of the system for integration in graphene production facilities.https://www.mdpi.com/1424-8220/23/6/3297THz time-domain spectroscopyTHz cross-correlation spectroscopyTHz quasi-time-domain spectroscopygraphene |
| spellingShingle | Bjørn Hübschmann Mølvig Thorsten Bæk Jie Ji Peter Bøggild Simon Jappe Lange Peter Uhd Jepsen Terahertz Cross-Correlation Spectroscopy and Imaging of Large-Area Graphene Sensors THz time-domain spectroscopy THz cross-correlation spectroscopy THz quasi-time-domain spectroscopy graphene |
| title | Terahertz Cross-Correlation Spectroscopy and Imaging of Large-Area Graphene |
| title_full | Terahertz Cross-Correlation Spectroscopy and Imaging of Large-Area Graphene |
| title_fullStr | Terahertz Cross-Correlation Spectroscopy and Imaging of Large-Area Graphene |
| title_full_unstemmed | Terahertz Cross-Correlation Spectroscopy and Imaging of Large-Area Graphene |
| title_short | Terahertz Cross-Correlation Spectroscopy and Imaging of Large-Area Graphene |
| title_sort | terahertz cross correlation spectroscopy and imaging of large area graphene |
| topic | THz time-domain spectroscopy THz cross-correlation spectroscopy THz quasi-time-domain spectroscopy graphene |
| url | https://www.mdpi.com/1424-8220/23/6/3297 |
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