Three-dimensional reconstruction of THz near-fields from a LiNbO$_3$ optical rectification source
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909638517063680 |
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| author | Othman, Annika E. Gabriel Mohamed A. K. Kramer, Patrick L. Miura, Harumy Hoffmann, Matthias C. Nanni, Emilio A. |
| author_facet | Othman, Annika E. Gabriel Mohamed A. K. Kramer, Patrick L. Miura, Harumy Hoffmann, Matthias C. Nanni, Emilio A. |
| contents | Terahertz (THz) generation by optical rectification in LiNbO$_3$ (LN) is a widely used technique for generating intense THz radiation. The spatiotemporal characterization of THz pulses from these sources is currently limited to far-field methods. While simulations of tilted pulse front THz generation have been published, little work has been done to measure the near-field properties of the THz source. A better understanding of the THz near-field properties will improve optimization of THz generation efficiency, transport, and coupling. We demonstrate a technique for quantitative spatiotemporal characterization of single-cycle strong-field THz pulses with 2D near-field electro-optic imaging. We have reconstructed the full temporal 3D THz near-field and shown how the phase front can be tailored by controlling the incident pump pulse. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03460 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Three-dimensional reconstruction of THz near-fields from a LiNbO$_3$ optical rectification source Othman, Annika E. Gabriel Mohamed A. K. Kramer, Patrick L. Miura, Harumy Hoffmann, Matthias C. Nanni, Emilio A. Optics Terahertz (THz) generation by optical rectification in LiNbO$_3$ (LN) is a widely used technique for generating intense THz radiation. The spatiotemporal characterization of THz pulses from these sources is currently limited to far-field methods. While simulations of tilted pulse front THz generation have been published, little work has been done to measure the near-field properties of the THz source. A better understanding of the THz near-field properties will improve optimization of THz generation efficiency, transport, and coupling. We demonstrate a technique for quantitative spatiotemporal characterization of single-cycle strong-field THz pulses with 2D near-field electro-optic imaging. We have reconstructed the full temporal 3D THz near-field and shown how the phase front can be tailored by controlling the incident pump pulse. |
| title | Three-dimensional reconstruction of THz near-fields from a LiNbO$_3$ optical rectification source |
| topic | Optics |
| url | https://arxiv.org/abs/2506.03460 |