Near-unity quantum interference of transverse spatial modes in an ultra-compact inverse-designed photonic device
- URL: http://arxiv.org/abs/2505.08668v1
- Date: Tue, 13 May 2025 15:30:47 GMT
- Title: Near-unity quantum interference of transverse spatial modes in an ultra-compact inverse-designed photonic device
- Authors: Jamika Ann Roque, Daniel Peace, Simon White, Emanuele Polino, Sayantan Das, Farzard Ghafari, Sergei Slussarenko, Nora Tischler, Jacquiline Romero,
- Abstract summary: We show quantum interference using inverse-designed transverse mode beamsplitters that have an ultra-compact footprint of 3 $mu m$ $times$ 3 $mu m$.<n>We measure a Hong-Ou-Mandel visibility of up to 99.56$pm$0.64 % from a single device, with an average visibility across three identical devices of 99.38$pm$0.41 %, indicating a high degree of engineering.<n>Our work demonstrates that inverse-designed components are suitable for quantum interference on-chip of multimode devices, paving the way for future compact integrated
- Score: 0.23217948176882763
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The transverse spatial mode of photons is an untapped resource for scaling up integrated photonic quantum computing. To be practically useful for improving scalability, reliable and high-visibility quantum interference between transverse spatial modes on-chip needs to be demonstrated. We show repeatable quantum interference using inverse-designed transverse mode beamsplitters that have an ultra-compact footprint of 3 $\mu m$ $\times$ 3 $\mu m$ -- the smallest transverse mode beamsplitters for 1550 nm photons to date. We measure a Hong-Ou-Mandel visibility of up to 99.56$\pm$0.64 % from a single device, with an average visibility across three identical devices of 99.38$\pm$0.41 %, indicating a high degree of reproducibility. Our work demonstrates that inverse-designed components are suitable for engineering quantum interference on-chip of multimode devices, paving the way for future compact integrated quantum photonic devices that exploit the transverse spatial mode of photons for high-dimensional quantum information.
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