Nonlinear van der Waals metasurfaces with resonantly enhanced light generation
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866914972881125376 |
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| author | Ling, Haonan Tang, Yuankai Tian, Xinyu Shafirin, Pavel Hossain, Mozakkar Vabishchevich, Polina P. Harutyunyan, Hayk Davoyan, Artur R. |
| author_facet | Ling, Haonan Tang, Yuankai Tian, Xinyu Shafirin, Pavel Hossain, Mozakkar Vabishchevich, Polina P. Harutyunyan, Hayk Davoyan, Artur R. |
| contents | Efficient nonlinear wave mixing is of paramount importance for a wide range of applications. However, weak optical nonlinearities pose significant challenges for accessing nonlinear light-matter interaction in compact systems. Here, we experimentally study second harmonic generation in deeply subwavelength 3R-MoS2 metasurfaces (<λ/13 thick). Our measurements, supported by theoretical analysis, reveal a complex interplay and coupling between geometric resonances, optical extinction, and strong nonlinear susceptibility dispersion near excitons. We further demonstrate >150-fold enhancement in second harmonic signal at 740 nm driven by the A exciton resonance. Additionally, our theoretical studies predict an enhancement of more than 10^6 in second harmonic generation in <100 nm thick structures exhibiting bound states in the continuum resonance. These findings provide insight into accessing and harnessing the unprecedented 3R-MoS2 nonlinearities at a subwavelength scale, paving the way for ultracompact nonlinear photonic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_11033 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Nonlinear van der Waals metasurfaces with resonantly enhanced light generation Ling, Haonan Tang, Yuankai Tian, Xinyu Shafirin, Pavel Hossain, Mozakkar Vabishchevich, Polina P. Harutyunyan, Hayk Davoyan, Artur R. Optics Applied Physics Efficient nonlinear wave mixing is of paramount importance for a wide range of applications. However, weak optical nonlinearities pose significant challenges for accessing nonlinear light-matter interaction in compact systems. Here, we experimentally study second harmonic generation in deeply subwavelength 3R-MoS2 metasurfaces (<λ/13 thick). Our measurements, supported by theoretical analysis, reveal a complex interplay and coupling between geometric resonances, optical extinction, and strong nonlinear susceptibility dispersion near excitons. We further demonstrate >150-fold enhancement in second harmonic signal at 740 nm driven by the A exciton resonance. Additionally, our theoretical studies predict an enhancement of more than 10^6 in second harmonic generation in <100 nm thick structures exhibiting bound states in the continuum resonance. These findings provide insight into accessing and harnessing the unprecedented 3R-MoS2 nonlinearities at a subwavelength scale, paving the way for ultracompact nonlinear photonic devices. |
| title | Nonlinear van der Waals metasurfaces with resonantly enhanced light generation |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2410.11033 |