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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.18908 |
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| _version_ | 1866911610974502912 |
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| author | Cao, Sida Edwards, Matthew R. |
| author_facet | Cao, Sida Edwards, Matthew R. |
| contents | High-energy terahertz pulses are challenging to produce due to the low conversion efficiency and limited optical damage threshold of nonlinear crystals. Here, we describe the high-efficiency generation of terahertz radiation pulses with tunable frequency and field strengths exceeding 500 GV/m by propagating two-color laser pulses through a strongly magnetized plasma. The field strength is substantially enhanced by utilizing two extraordinary-mode branches to minimize the phase mismatch. We derive the phase-matching conditions and characterize the nonlinear coupling analytically, and validate these predictions with particle-in-cell simulations. These results establish a new pathway toward next-generation intense terahertz sources with performance well beyond the limits of existing plasma mechanisms and conventional crystal-based approaches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_18908 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Intense tunable terahertz radiation from phase-matched difference frequency generation in strongly magnetized plasmas Cao, Sida Edwards, Matthew R. Plasma Physics High-energy terahertz pulses are challenging to produce due to the low conversion efficiency and limited optical damage threshold of nonlinear crystals. Here, we describe the high-efficiency generation of terahertz radiation pulses with tunable frequency and field strengths exceeding 500 GV/m by propagating two-color laser pulses through a strongly magnetized plasma. The field strength is substantially enhanced by utilizing two extraordinary-mode branches to minimize the phase mismatch. We derive the phase-matching conditions and characterize the nonlinear coupling analytically, and validate these predictions with particle-in-cell simulations. These results establish a new pathway toward next-generation intense terahertz sources with performance well beyond the limits of existing plasma mechanisms and conventional crystal-based approaches. |
| title | Intense tunable terahertz radiation from phase-matched difference frequency generation in strongly magnetized plasmas |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2604.18908 |