Highly efficient terahertz generation using 3D Dirac semimetals
It is shown that three-dimensional Dirac semimetals are promising candidates for highly efficient optical-to-terahertz conversion due to their extreme optical nonlinearities. In particular, it is predicted that the conversion efficiency of (Formula presented.) exceeds typical materials like (Formula...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/170539 |
| _version_ | 1826111868359409664 |
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| author | Wang, Lu Lim, Jeremy Wong, Liang Jie |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Wang, Lu Lim, Jeremy Wong, Liang Jie |
| author_sort | Wang, Lu |
| collection | NTU |
| description | It is shown that three-dimensional Dirac semimetals are promising candidates for highly efficient optical-to-terahertz conversion due to their extreme optical nonlinearities. In particular, it is predicted that the conversion efficiency of (Formula presented.) exceeds typical materials like (Formula presented.) by >5000 times over nanoscale propagation distances. Studies show that even when no restrictions are placed on propagation distance, (Formula presented.) still outperforms (Formula presented.) in efficiency by >10 times. The results indicate that by tuning the Fermi energy, Pauli blocking can be leveraged to realize a step-like efficiency increase in the optical-to-terahertz conversion process. It is found that large optical-to-terahertz conversion efficiencies persists over a wide range of input frequencies, input field strengths, Fermi energies, and temperatures. These results could pave the way to the development of ultrathin-film terahertz sources for compact terahertz technologies. |
| first_indexed | 2024-10-01T02:57:36Z |
| format | Journal Article |
| id | ntu-10356/170539 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:57:36Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1705392023-09-19T02:07:11Z Highly efficient terahertz generation using 3D Dirac semimetals Wang, Lu Lim, Jeremy Wong, Liang Jie School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Dirac Semimetals Nonlinear Optics It is shown that three-dimensional Dirac semimetals are promising candidates for highly efficient optical-to-terahertz conversion due to their extreme optical nonlinearities. In particular, it is predicted that the conversion efficiency of (Formula presented.) exceeds typical materials like (Formula presented.) by >5000 times over nanoscale propagation distances. Studies show that even when no restrictions are placed on propagation distance, (Formula presented.) still outperforms (Formula presented.) in efficiency by >10 times. The results indicate that by tuning the Fermi energy, Pauli blocking can be leveraged to realize a step-like efficiency increase in the optical-to-terahertz conversion process. It is found that large optical-to-terahertz conversion efficiencies persists over a wide range of input frequencies, input field strengths, Fermi energies, and temperatures. These results could pave the way to the development of ultrathin-film terahertz sources for compact terahertz technologies. Agency for Science, Technology and Research (A*STAR) Nanyang Technological University L.J.W. acknowledges the support of the Agency for Science, Technology and Research (A*STAR) Science & Engineering Research Council (Grant No. A1984c0043), and the Nanyang Assistant Professorship Start-up Grant. 2023-09-19T02:07:11Z 2023-09-19T02:07:11Z 2022 Journal Article Wang, L., Lim, J. & Wong, L. J. (2022). Highly efficient terahertz generation using 3D Dirac semimetals. Laser and Photonics Reviews, 16(10), 2100279-. https://dx.doi.org/10.1002/lpor.202100279 1863-8880 https://hdl.handle.net/10356/170539 10.1002/lpor.202100279 2-s2.0-85135046196 10 16 2100279 en A1984c0043 Laser and Photonics Reviews © 2022 Wiley-VCH GmbH. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Dirac Semimetals Nonlinear Optics Wang, Lu Lim, Jeremy Wong, Liang Jie Highly efficient terahertz generation using 3D Dirac semimetals |
| title | Highly efficient terahertz generation using 3D Dirac semimetals |
| title_full | Highly efficient terahertz generation using 3D Dirac semimetals |
| title_fullStr | Highly efficient terahertz generation using 3D Dirac semimetals |
| title_full_unstemmed | Highly efficient terahertz generation using 3D Dirac semimetals |
| title_short | Highly efficient terahertz generation using 3D Dirac semimetals |
| title_sort | highly efficient terahertz generation using 3d dirac semimetals |
| topic | Engineering::Electrical and electronic engineering Dirac Semimetals Nonlinear Optics |
| url | https://hdl.handle.net/10356/170539 |
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