Characterizing and exploiting cross-talk effect in SPAD arrays for two-photon interference
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| author | Kulkov, Sergei Radmacherova, Lada Matousek, Ondrej De Sousa, Lou-Ann Pestana Bernasconi, Ermanno Bruschini, Claudio Milanese, Tommaso Charbon, Edoardo Nomerotski, Andrei Svihra, Peter |
| author_facet | Kulkov, Sergei Radmacherova, Lada Matousek, Ondrej De Sousa, Lou-Ann Pestana Bernasconi, Ermanno Bruschini, Claudio Milanese, Tommaso Charbon, Edoardo Nomerotski, Andrei Svihra, Peter |
| contents | SPAD arrays are becoming a popular choice for measuring two-photon interference effects thanks to their high timing precision, fast readout, and high quantum efficiency. However, such sensors are affected by cross-talk that may mimic the useful signal. Even with a low probability of seeing cross-talk effect between neighboring SPADs, it was found that it still may reach the farther channels up to a half of millimeter away. Moreover, the use of microlenses that help SPADs achieve even better efficiency further boosts the cross-talk effect. In this work, we characterize the cross-talk effect and compare it to the Hanbury Brown-Twiss effect in the LinoSPAD2 camera, which has a linear sensor of 512 SPADs. Additionally, we compare the results between sensors with and without the microlenses. Finally, we present a timing calibration technique for the detector that utilizes the cross-talk effect. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_01185 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Characterizing and exploiting cross-talk effect in SPAD arrays for two-photon interference Kulkov, Sergei Radmacherova, Lada Matousek, Ondrej De Sousa, Lou-Ann Pestana Bernasconi, Ermanno Bruschini, Claudio Milanese, Tommaso Charbon, Edoardo Nomerotski, Andrei Svihra, Peter Quantum Physics SPAD arrays are becoming a popular choice for measuring two-photon interference effects thanks to their high timing precision, fast readout, and high quantum efficiency. However, such sensors are affected by cross-talk that may mimic the useful signal. Even with a low probability of seeing cross-talk effect between neighboring SPADs, it was found that it still may reach the farther channels up to a half of millimeter away. Moreover, the use of microlenses that help SPADs achieve even better efficiency further boosts the cross-talk effect. In this work, we characterize the cross-talk effect and compare it to the Hanbury Brown-Twiss effect in the LinoSPAD2 camera, which has a linear sensor of 512 SPADs. Additionally, we compare the results between sensors with and without the microlenses. Finally, we present a timing calibration technique for the detector that utilizes the cross-talk effect. |
| title | Characterizing and exploiting cross-talk effect in SPAD arrays for two-photon interference |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2504.01185 |