A 2D van der Waals Material for Terahertz Emission with Giant Optical Rectification
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arXiv
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| Format: | Preprint |
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2024
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| author | Handa, Taketo Huang, Chun-Ying Li, Yiliu Olsen, Nicholas Chica, Daniel G. Xu, David D. Sturm, Felix McIver, James W. Roy, Xavier Zhu, Xiaoyang |
| author_facet | Handa, Taketo Huang, Chun-Ying Li, Yiliu Olsen, Nicholas Chica, Daniel G. Xu, David D. Sturm, Felix McIver, James W. Roy, Xavier Zhu, Xiaoyang |
| contents | Exfoliation and stacking of two-dimensional (2D) van der Waals (vdW) crystals have created unprecedented opportunities in the discovery of quantum phases. A major obstacle to the advancement of this field is the limited spectroscopic access due to a mismatch in sample sizes (1 - 10 micrometer) and wavelengths (0.1 - 1 millimeter) of electromagnetic radiation relevant to their low-energy excitations. Here, we introduce a new member of the 2D vdW material family: a terahertz (THz) emitter. We show intense and broadband THz generation from the vdW ferroelectric semiconductor NbOI2 with optical rectification efficiency over one-order-of-magnitude higher than that of the current standard THz emitter, ZnTe. The NbOI2 THz emitter can be easily integrated into vdW heterostructures for on-chip near-field THz spectroscopy of a target vdW material/device. Our approach provides a general spectroscopic tool for the rapidly expanding field of 2D vdW materials and quantum matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_09421 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A 2D van der Waals Material for Terahertz Emission with Giant Optical Rectification Handa, Taketo Huang, Chun-Ying Li, Yiliu Olsen, Nicholas Chica, Daniel G. Xu, David D. Sturm, Felix McIver, James W. Roy, Xavier Zhu, Xiaoyang Materials Science Optics Exfoliation and stacking of two-dimensional (2D) van der Waals (vdW) crystals have created unprecedented opportunities in the discovery of quantum phases. A major obstacle to the advancement of this field is the limited spectroscopic access due to a mismatch in sample sizes (1 - 10 micrometer) and wavelengths (0.1 - 1 millimeter) of electromagnetic radiation relevant to their low-energy excitations. Here, we introduce a new member of the 2D vdW material family: a terahertz (THz) emitter. We show intense and broadband THz generation from the vdW ferroelectric semiconductor NbOI2 with optical rectification efficiency over one-order-of-magnitude higher than that of the current standard THz emitter, ZnTe. The NbOI2 THz emitter can be easily integrated into vdW heterostructures for on-chip near-field THz spectroscopy of a target vdW material/device. Our approach provides a general spectroscopic tool for the rapidly expanding field of 2D vdW materials and quantum matter. |
| title | A 2D van der Waals Material for Terahertz Emission with Giant Optical Rectification |
| topic | Materials Science Optics |
| url | https://arxiv.org/abs/2411.09421 |