Generation of tunable quantum entanglement via nonlinearity symmetry breaking in semiconductor metasurfaces
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arXiv
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| Format: | Preprint |
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2024
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| author | Ma, Jinyong Fan, Tongmiao Haggren, Tuomas Molina, Laura Valencia Parry, Matthew Shinde, Saniya Zhang, Jihua Morales, Rocio Camacho Setzpfandt, Frank Tan, Hark Hoe Jagadish, Chennupati Neshev, Dragomir N. Sukhorukov, Andrey A. |
| author_facet | Ma, Jinyong Fan, Tongmiao Haggren, Tuomas Molina, Laura Valencia Parry, Matthew Shinde, Saniya Zhang, Jihua Morales, Rocio Camacho Setzpfandt, Frank Tan, Hark Hoe Jagadish, Chennupati Neshev, Dragomir N. Sukhorukov, Andrey A. |
| contents | Tunable biphoton quantum entanglement generated from nonlinear processes is highly desirable for cutting-edge quantum technologies, yet its tunability is substantially constrained by the symmetry of material nonlinear tensors. Here, we overcome this constraint by introducing symmetry-breaking in nonlinear polarization to generate optically tunable biphoton entanglement at picosecond speeds. Asymmetric optical responses have made breakthroughs in classical applications like non-reciprocal light transmission. We now experimentally demonstrate the nonlinear asymmetry response for biphoton entanglement using a semiconductor metasurface incorporating [110] InGaP nano-resonators with structural asymmetry. We realize continuous tuning of polarization entanglement from near-unentangled states to a Bell state. This tunability can also extend to produce tailored hyperentanglement. Furthermore, our nanoscale entanglement source features an ultra-high coincidence-to-accidental ratio of $\approx7\times10^4$, outperforming existing semiconductor flat optics by two orders of magnitude. Introducing asymmetric nonlinear response in quantum metasurfaces opens new directions for tailoring on-demand quantum states and beyond. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_10845 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Generation of tunable quantum entanglement via nonlinearity symmetry breaking in semiconductor metasurfaces Ma, Jinyong Fan, Tongmiao Haggren, Tuomas Molina, Laura Valencia Parry, Matthew Shinde, Saniya Zhang, Jihua Morales, Rocio Camacho Setzpfandt, Frank Tan, Hark Hoe Jagadish, Chennupati Neshev, Dragomir N. Sukhorukov, Andrey A. Optics Tunable biphoton quantum entanglement generated from nonlinear processes is highly desirable for cutting-edge quantum technologies, yet its tunability is substantially constrained by the symmetry of material nonlinear tensors. Here, we overcome this constraint by introducing symmetry-breaking in nonlinear polarization to generate optically tunable biphoton entanglement at picosecond speeds. Asymmetric optical responses have made breakthroughs in classical applications like non-reciprocal light transmission. We now experimentally demonstrate the nonlinear asymmetry response for biphoton entanglement using a semiconductor metasurface incorporating [110] InGaP nano-resonators with structural asymmetry. We realize continuous tuning of polarization entanglement from near-unentangled states to a Bell state. This tunability can also extend to produce tailored hyperentanglement. Furthermore, our nanoscale entanglement source features an ultra-high coincidence-to-accidental ratio of $\approx7\times10^4$, outperforming existing semiconductor flat optics by two orders of magnitude. Introducing asymmetric nonlinear response in quantum metasurfaces opens new directions for tailoring on-demand quantum states and beyond. |
| title | Generation of tunable quantum entanglement via nonlinearity symmetry breaking in semiconductor metasurfaces |
| topic | Optics |
| url | https://arxiv.org/abs/2409.10845 |