Nonlinearity Symmetry Breaking for Generating Tunable Quantum Entanglement in Semiconductor Metasurfaces
Tunable photonic quantum entanglement promises to advance information processing beyond classical approaches, facilitating applications in quantum communications, imaging and computing. A practical approach to preparing quantum entanglement at room temperature is to engineer photon-pair generation through spontaneous parametric down-conversion (SPDC). Nonlinear flat-optics devices, incorporating subwavelength-thick nonlinear materials, are emerging as new platforms for generating photon pairs at the nanoscale. In particular, nanostructured metasurfaces supporting optical resonances can enhance and tailor SPDC processes, allowing for the generation of spectral, polarization, and spatial entanglement [1]. However, the tunability of polarization entanglement is subject to the symmetry of nonlinear tensors of materials, where the pump photon polarization serves as the only tuning parameter [2].
Authors
- Tuomas Haggrén (ORCID: https://orcid.org/0000-0001-6033-7391)
- Andrey A. Sukhorukov (ORCID: https://orcid.org/0000-0002-5116-5425)
- Frank Setzpfandt (ORCID: https://orcid.org/0000-0002-7919-8181)
- C. Jagadish (ORCID: https://orcid.org/0000-0003-1528-9479)
- Rocio Camacho‐Morales (ORCID: https://orcid.org/0000-0002-6102-7157)
- Hark Hoe Tan (ORCID: https://orcid.org/0000-0002-7816-537X)
- Dragomir N. Neshev (ORCID: https://orcid.org/0000-0002-4508-8646)
- Jihua Zhang (ORCID: https://orcid.org/0000-0002-3506-6638)
- Matthew Parry (ORCID: https://orcid.org/0000-0002-1661-0810)
- Jinyong Ma (ORCID: https://orcid.org/0000-0001-5753-794X)
- Laura Valencia Molina (ORCID: https://orcid.org/0000-0002-5803-9085)
- Saniya Shinde (ORCID: https://orcid.org/0009-0001-9902-7945)
- Tongmiao Fan (ORCID: https://orcid.org/0009-0001-4576-865X)
Institutions
- Australian National University (AU)
- ARC Centre of Excellence for Transformative Meta-Optical Systems (AU)
Publication Details
- Published
- 2025-06-23
- DOI
- https://doi.org/10.1109/cleo/europe-eqec65582.2025.11111014
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 0.00