Giant electro-optic and elasto-optic effects in ferroelectric NbOI$_{2}$
| Autor: | Zhang, Zhenlong, Di, Xuehan, Paillard, Charles, Bellaiche, Laurent, Jiang, Zhijun |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 110, L100101 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.110.L100101 |
| Popis: | 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. Comment: 6 pages, 3 figures |
| Databáze: | arXiv |
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