Diffraction of correlated biphotons through transparent samples
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866915292224946176 |
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| author | Dehghan, Nazanin D'Errico, Alessio Zhang, Yingwen Sussman, Benjamin Karimi, Ebrahim |
| author_facet | Dehghan, Nazanin D'Errico, Alessio Zhang, Yingwen Sussman, Benjamin Karimi, Ebrahim |
| contents | Two-photon states generated through degenerate spontaneous parametric down-conversion (SPDC) can exhibit sharp correlations in the transverse spatial coordinates. This property leads to unique free-space propagation features. Here, we show that a phase object placed in the image plane of the source affects the free space propagation of the SPDC in a way that is mathematically analogous to the Fresnel diffraction of a first-order coherent source. This effect can be observed via the extraction of correlation images. We demonstrate this prediction with an experiment where the diffraction of correlated bi-photons is detected using an event-based camera. The results allow us to reconstruct the phase structure of the sample via non-interferometric phase retrieval methods. We verify that the retrieved phase patterns exhibit an enhanced contrast due to the probe two-photon nature. Our findings offer applications for non-interferometric, quantum-enhanced phase imaging. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_22635 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Diffraction of correlated biphotons through transparent samples Dehghan, Nazanin D'Errico, Alessio Zhang, Yingwen Sussman, Benjamin Karimi, Ebrahim Quantum Physics Optics Two-photon states generated through degenerate spontaneous parametric down-conversion (SPDC) can exhibit sharp correlations in the transverse spatial coordinates. This property leads to unique free-space propagation features. Here, we show that a phase object placed in the image plane of the source affects the free space propagation of the SPDC in a way that is mathematically analogous to the Fresnel diffraction of a first-order coherent source. This effect can be observed via the extraction of correlation images. We demonstrate this prediction with an experiment where the diffraction of correlated bi-photons is detected using an event-based camera. The results allow us to reconstruct the phase structure of the sample via non-interferometric phase retrieval methods. We verify that the retrieved phase patterns exhibit an enhanced contrast due to the probe two-photon nature. Our findings offer applications for non-interferometric, quantum-enhanced phase imaging. |
| title | Diffraction of correlated biphotons through transparent samples |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2410.22635 |