Boosting classical and quantum nonlinear processes in ultrathin van der Waals materials
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arXiv
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| Autori principali: | , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909557632008192 |
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| author | Lyu, Xiaodan Kallioniemi, Leevi Cai, Hongbing An, Liheng Duan, Ruihuan Wu, Shuin Jian Tan, Qinghai Zhang, Chusheng He, Ruihua Miao, Yansong Liu, Zheng Ling, Alexander Perez, Jesus Zúñiga Gao, Weibo |
| author_facet | Lyu, Xiaodan Kallioniemi, Leevi Cai, Hongbing An, Liheng Duan, Ruihuan Wu, Shuin Jian Tan, Qinghai Zhang, Chusheng He, Ruihua Miao, Yansong Liu, Zheng Ling, Alexander Perez, Jesus Zúñiga Gao, Weibo |
| contents | Understanding and controlling nonlinear processes is crucial for engineering light-matter interaction and generating non-classical light. A significant challenge in ultra-thin nonlinear materials is the marked diminution of the nonlinear conversion efficiency due to the reduced light-matter interaction length and, in many cases, the centrosymmetric crystalline structures. Here we relax these limitations and report a giant boost of classical and quantum nonlinear processes in ultrathin van der Waals materials. Specifically, with a metal-nonlinear material heterostructure we enhance classical second-harmonic generation in h-BN flakes by two-orders of magnitude. Moreover, we have engineered a metal-SiO2-nonlinear material heterostructure resulting in a remarkable two orders of magnitude augmentation of the quantum spontaneous parametric down-conversion (SPDC) in NbOCl2 flakes. Notably, we demonstrate SPDC in a 16 nm-thick NbOCl2 flake integrated into the proposed structure. These findings simplify on-chip quantum state engineering and accelerate the use of van der Waals materials in nonlinear optoelectronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_23075 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Boosting classical and quantum nonlinear processes in ultrathin van der Waals materials Lyu, Xiaodan Kallioniemi, Leevi Cai, Hongbing An, Liheng Duan, Ruihuan Wu, Shuin Jian Tan, Qinghai Zhang, Chusheng He, Ruihua Miao, Yansong Liu, Zheng Ling, Alexander Perez, Jesus Zúñiga Gao, Weibo Quantum Physics Optics Understanding and controlling nonlinear processes is crucial for engineering light-matter interaction and generating non-classical light. A significant challenge in ultra-thin nonlinear materials is the marked diminution of the nonlinear conversion efficiency due to the reduced light-matter interaction length and, in many cases, the centrosymmetric crystalline structures. Here we relax these limitations and report a giant boost of classical and quantum nonlinear processes in ultrathin van der Waals materials. Specifically, with a metal-nonlinear material heterostructure we enhance classical second-harmonic generation in h-BN flakes by two-orders of magnitude. Moreover, we have engineered a metal-SiO2-nonlinear material heterostructure resulting in a remarkable two orders of magnitude augmentation of the quantum spontaneous parametric down-conversion (SPDC) in NbOCl2 flakes. Notably, we demonstrate SPDC in a 16 nm-thick NbOCl2 flake integrated into the proposed structure. These findings simplify on-chip quantum state engineering and accelerate the use of van der Waals materials in nonlinear optoelectronics. |
| title | Boosting classical and quantum nonlinear processes in ultrathin van der Waals materials |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2503.23075 |