Electric-field-enhanced second-harmonic domain contrast and nonreciprocity in a van der Waals antiferromagnet
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866929478942326784 |
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| author | Wang, Ziqian Wang, Meng Lehmann, Jannis Shiomi, Yuki Arima, Taka-hisa Nagaosa, Naoto Tokura, Yoshinori Ogawa, Naoki |
| author_facet | Wang, Ziqian Wang, Meng Lehmann, Jannis Shiomi, Yuki Arima, Taka-hisa Nagaosa, Naoto Tokura, Yoshinori Ogawa, Naoki |
| contents | Imaging antiferromagnetic 180° domains with actively controlled visibility is vital for both fundamental science and sophisticated applications. While optical second-harmonic generation (SHG) is a well-known technique for distinguishing such domains in non-centrosymmetric antiferromagnets, a general material-based strategy to control domain contrast remains elusive. Using van der Waals antiferromagnet MnPS$_3$ as a proof of concept, we demonstrate the tuning of nonreciprocity-induced domain contrast in SHG through applying an in-plane electric field that transforms the magnetic point group to its unitary subgroup. The interference among intrinsic electric-dipole, magnetic-dipole, and field-induced electric-dipole transitions, each carrying distinct characters under space-inversion ($\mathcal{P}$) and time-reversal ($\mathcal{T}$) operations, enables large tuning of domain contrast and nonreciprocity in a broad spectral range. This strategy, generically applicable to systems characterized by $\mathcal{PT}$-symmetric magnetic groups with a polar unitary subgroup, offers a path to fast electrical modulation of nonlinear nonreciprocal photonic behaviors using antiferromagnets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_11222 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Electric-field-enhanced second-harmonic domain contrast and nonreciprocity in a van der Waals antiferromagnet Wang, Ziqian Wang, Meng Lehmann, Jannis Shiomi, Yuki Arima, Taka-hisa Nagaosa, Naoto Tokura, Yoshinori Ogawa, Naoki Strongly Correlated Electrons Optics Imaging antiferromagnetic 180° domains with actively controlled visibility is vital for both fundamental science and sophisticated applications. While optical second-harmonic generation (SHG) is a well-known technique for distinguishing such domains in non-centrosymmetric antiferromagnets, a general material-based strategy to control domain contrast remains elusive. Using van der Waals antiferromagnet MnPS$_3$ as a proof of concept, we demonstrate the tuning of nonreciprocity-induced domain contrast in SHG through applying an in-plane electric field that transforms the magnetic point group to its unitary subgroup. The interference among intrinsic electric-dipole, magnetic-dipole, and field-induced electric-dipole transitions, each carrying distinct characters under space-inversion ($\mathcal{P}$) and time-reversal ($\mathcal{T}$) operations, enables large tuning of domain contrast and nonreciprocity in a broad spectral range. This strategy, generically applicable to systems characterized by $\mathcal{PT}$-symmetric magnetic groups with a polar unitary subgroup, offers a path to fast electrical modulation of nonlinear nonreciprocal photonic behaviors using antiferromagnets. |
| title | Electric-field-enhanced second-harmonic domain contrast and nonreciprocity in a van der Waals antiferromagnet |
| topic | Strongly Correlated Electrons Optics |
| url | https://arxiv.org/abs/2401.11222 |