Analytical model and dynamical phase-field simulation of terahertz transmission across ferroelectrics
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866929450059300864 |
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| author | Chen, Taorui Wang, Bo Zhu, Yujie Zhuang, Shihao Chen, Long-Qing Hu, Jia-Mian |
| author_facet | Chen, Taorui Wang, Bo Zhu, Yujie Zhuang, Shihao Chen, Long-Qing Hu, Jia-Mian |
| contents | We theoretically investigate the steady-state transmission of continuous terahertz (THz) wave across a freestanding ferroelectric slab. Based on the Landau-Ginzburg-Devonshire theory of ferroelectrics and the coupled equations of motion for polarization and electromagnetic (EM) waves, we derive the analytical expressions of the frequency- and thickness-dependent dielectric susceptibility and transmission coefficient at the thin slab limit in the harmonic excitation regime. When the slab thickness is much smaller than the THz wavelength in the ferroelectric, the analytical predictions agree well with the numerical simulations from a dynamical phase-field model that incorporates the coupled dynamics of strain, polarization, and EM wave in multiphase systems. At larger thicknesses, the transmission is mainly determined by the frequency-dependent attenuation of THz waves in the ferroelectric and the formation of a standing polarization/THz wave. Our results advance the understanding of the interaction between THz wave and ferroelectrics and suggest the potential of exploiting ferroelectrics to achieve low-heat-dissipation, nonvolatile voltage modulation of THz transmission for high-data-rate wireless communication. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_04824 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Analytical model and dynamical phase-field simulation of terahertz transmission across ferroelectrics Chen, Taorui Wang, Bo Zhu, Yujie Zhuang, Shihao Chen, Long-Qing Hu, Jia-Mian Mesoscale and Nanoscale Physics Materials Science Applied Physics Optics We theoretically investigate the steady-state transmission of continuous terahertz (THz) wave across a freestanding ferroelectric slab. Based on the Landau-Ginzburg-Devonshire theory of ferroelectrics and the coupled equations of motion for polarization and electromagnetic (EM) waves, we derive the analytical expressions of the frequency- and thickness-dependent dielectric susceptibility and transmission coefficient at the thin slab limit in the harmonic excitation regime. When the slab thickness is much smaller than the THz wavelength in the ferroelectric, the analytical predictions agree well with the numerical simulations from a dynamical phase-field model that incorporates the coupled dynamics of strain, polarization, and EM wave in multiphase systems. At larger thicknesses, the transmission is mainly determined by the frequency-dependent attenuation of THz waves in the ferroelectric and the formation of a standing polarization/THz wave. Our results advance the understanding of the interaction between THz wave and ferroelectrics and suggest the potential of exploiting ferroelectrics to achieve low-heat-dissipation, nonvolatile voltage modulation of THz transmission for high-data-rate wireless communication. |
| title | Analytical model and dynamical phase-field simulation of terahertz transmission across ferroelectrics |
| topic | Mesoscale and Nanoscale Physics Materials Science Applied Physics Optics |
| url | https://arxiv.org/abs/2312.04824 |