Giant electro-optic and elasto-optic effects in ferroelectric NbOI$_{2}$
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910594566717440 |
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| author | Zhang, Zhenlong Di, Xuehan Paillard, Charles Bellaiche, Laurent Jiang, Zhijun |
| author_facet | Zhang, Zhenlong Di, Xuehan Paillard, Charles Bellaiche, Laurent Jiang, Zhijun |
| contents | First-principles calculations are performed to investigate the electro-optic (EO) and elasto-optic effects of the three-dimensional (bulk) and two-dimensional (monolayer) ferroelectric NbOI$_{2}$. Remarkably large linear EO and elasto-optic coefficients are discovered in both systems, when under stress-free conditions. We further found that the EO responses of bulk and monolayer NbOI$_{2}$ can be further enhanced with epitaxial strain, because of a strain-driven ferroelectric-to-paraelectric transition that originates from the softening of some polar optical modes. Our findings thus point out that NbOI$_{2}$, as well as other niobium oxide dihalides are highly promising for paving the way for potentially efficient nonlinear optical device applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_04225 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Giant electro-optic and elasto-optic effects in ferroelectric NbOI$_{2}$ Zhang, Zhenlong Di, Xuehan Paillard, Charles Bellaiche, Laurent Jiang, Zhijun Materials Science First-principles calculations are performed to investigate the electro-optic (EO) and elasto-optic effects of the three-dimensional (bulk) and two-dimensional (monolayer) ferroelectric NbOI$_{2}$. Remarkably large linear EO and elasto-optic coefficients are discovered in both systems, when under stress-free conditions. We further found that the EO responses of bulk and monolayer NbOI$_{2}$ can be further enhanced with epitaxial strain, because of a strain-driven ferroelectric-to-paraelectric transition that originates from the softening of some polar optical modes. Our findings thus point out that NbOI$_{2}$, as well as other niobium oxide dihalides are highly promising for paving the way for potentially efficient nonlinear optical device applications. |
| title | Giant electro-optic and elasto-optic effects in ferroelectric NbOI$_{2}$ |
| topic | Materials Science |
| url | https://arxiv.org/abs/2408.04225 |