Photoinduced strain and polarization switching in barium titanate in the far-infrared spectral range
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2026
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866914426532134912 |
|---|---|
| author | Kwaaitaal, Maarten Lourens, Daniel Davies, Carl S. Kirilyuk, Andrei |
| author_facet | Kwaaitaal, Maarten Lourens, Daniel Davies, Carl S. Kirilyuk, Andrei |
| contents | Short mid-infrared laser pulses efficiently facilitate ultrafast manipulation of ferroic order parameters, including full reversal of magnetization or ferroelectric polarization, with the invoked mechanisms relating to the properties of polar phonons in ionic crystals. Much less is known, however, about the behaviour of such order parameters in response to an excitation in the far-infrared range, where phonons are more collective and less polar. Here we investigate transient crystallographic strains and polarization switching in ferroelectric barium titanate (BaTiO3) driven by an excitation in the frequency range of 5-8 THz, or wavelengths of 35-60 um. We find that switching persists in a large part of this range, but is governed primarily by optical absorption rather than by the longitudinal optical phonons or epsilon-near-zero conditions that dominate in the mid-infrared regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_26229 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Photoinduced strain and polarization switching in barium titanate in the far-infrared spectral range Kwaaitaal, Maarten Lourens, Daniel Davies, Carl S. Kirilyuk, Andrei Materials Science Short mid-infrared laser pulses efficiently facilitate ultrafast manipulation of ferroic order parameters, including full reversal of magnetization or ferroelectric polarization, with the invoked mechanisms relating to the properties of polar phonons in ionic crystals. Much less is known, however, about the behaviour of such order parameters in response to an excitation in the far-infrared range, where phonons are more collective and less polar. Here we investigate transient crystallographic strains and polarization switching in ferroelectric barium titanate (BaTiO3) driven by an excitation in the frequency range of 5-8 THz, or wavelengths of 35-60 um. We find that switching persists in a large part of this range, but is governed primarily by optical absorption rather than by the longitudinal optical phonons or epsilon-near-zero conditions that dominate in the mid-infrared regime. |
| title | Photoinduced strain and polarization switching in barium titanate in the far-infrared spectral range |
| topic | Materials Science |
| url | https://arxiv.org/abs/2603.26229 |