Third-Order Spontaneous Parametric Down Conversion in Dielectric Nonlinear Resonant Metasurfaces
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909769784098816 |
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| author | Bacaoco, Miguel Y. Koshelev, Kirill Solntsev, Alexander S. |
| author_facet | Bacaoco, Miguel Y. Koshelev, Kirill Solntsev, Alexander S. |
| contents | We propose a general scheme to investigate photon triplet generation (PTG) via third-order spontaneous parametric downconversion (TOSPDC) in $χ^{(3)}$ nonlinear structures. Our approach leverages the quantum-classical correspondence between TOSPDC and its reverse classical process, three-wave sum-frequency generation (TSFG), to efficiently estimate the PTG rate. We apply this framework to nonlinear metasurfaces supporting quasi-bound states in the continuum (qBICs) in the optical range. From numerical analysis of non-collinear TSFG with degenerate input waves at qBIC wavelengths, we predict wavelength-tunable three-photon emission with spatio-angular correlations. These findings establish a novel method for modelling TOSPDC and also highlight the potential of nonlinear resonant metasurfaces as compact free-space photon triplet sources with quantum state control. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_02267 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Third-Order Spontaneous Parametric Down Conversion in Dielectric Nonlinear Resonant Metasurfaces Bacaoco, Miguel Y. Koshelev, Kirill Solntsev, Alexander S. Optics We propose a general scheme to investigate photon triplet generation (PTG) via third-order spontaneous parametric downconversion (TOSPDC) in $χ^{(3)}$ nonlinear structures. Our approach leverages the quantum-classical correspondence between TOSPDC and its reverse classical process, three-wave sum-frequency generation (TSFG), to efficiently estimate the PTG rate. We apply this framework to nonlinear metasurfaces supporting quasi-bound states in the continuum (qBICs) in the optical range. From numerical analysis of non-collinear TSFG with degenerate input waves at qBIC wavelengths, we predict wavelength-tunable three-photon emission with spatio-angular correlations. These findings establish a novel method for modelling TOSPDC and also highlight the potential of nonlinear resonant metasurfaces as compact free-space photon triplet sources with quantum state control. |
| title | Third-Order Spontaneous Parametric Down Conversion in Dielectric Nonlinear Resonant Metasurfaces |
| topic | Optics |
| url | https://arxiv.org/abs/2504.02267 |