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| Auteurs principaux: | , |
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| Format: | Preprint |
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2025
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| Accès en ligne: | https://arxiv.org/abs/2506.17819 |
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| _version_ | 1866908441524568064 |
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| author | Almassri, Mahmoud Saleh, Mohammed F. |
| author_facet | Almassri, Mahmoud Saleh, Mohammed F. |
| contents | In this paper, we propose exploiting dispersion-engineered nanophotonic waveguides in generating unprecedented ultra-broadband spectral and polarisation entanglement using spontaneous four-wave mixing parametric processes. We developed a simplified theoretical quantum framework to investigate and analyse these interactions under pulse source excitations. Using aluminum gallium arsenide and thin-film lithium niobate waveguides, we anticipate to obtain photon pairs with high-dimensional frequency entanglement, characterised by Schmidt numbers as large as ~10$^8$, and covering the wavelength range 940--2730 nm (equivalent to a 210 THz bandwidth). Additionally, we show that Al$_{0.3}$Ga$_{0.7}$As waveguides with hybrid cladding can enable the generation of polarisation-entangled photon pairs with concurrence exceeding 0.93 across wavelengths from 1175 nm to 1750 nm, spanning almost across all the telecommunication bands with only approximately 27 nm window inevitable-degradation around the pump wavelength. We envisage that these introduced integrated on-chip sources will significantly advance quantum photonic technologies, enabling breakthroughs in multi-channel quantum networking and scalable quantum information systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_17819 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultra-broadband spectral and polarisation entanglement using dispersion-engineered nanophotonic waveguides Almassri, Mahmoud Saleh, Mohammed F. Optics In this paper, we propose exploiting dispersion-engineered nanophotonic waveguides in generating unprecedented ultra-broadband spectral and polarisation entanglement using spontaneous four-wave mixing parametric processes. We developed a simplified theoretical quantum framework to investigate and analyse these interactions under pulse source excitations. Using aluminum gallium arsenide and thin-film lithium niobate waveguides, we anticipate to obtain photon pairs with high-dimensional frequency entanglement, characterised by Schmidt numbers as large as ~10$^8$, and covering the wavelength range 940--2730 nm (equivalent to a 210 THz bandwidth). Additionally, we show that Al$_{0.3}$Ga$_{0.7}$As waveguides with hybrid cladding can enable the generation of polarisation-entangled photon pairs with concurrence exceeding 0.93 across wavelengths from 1175 nm to 1750 nm, spanning almost across all the telecommunication bands with only approximately 27 nm window inevitable-degradation around the pump wavelength. We envisage that these introduced integrated on-chip sources will significantly advance quantum photonic technologies, enabling breakthroughs in multi-channel quantum networking and scalable quantum information systems. |
| title | Ultra-broadband spectral and polarisation entanglement using dispersion-engineered nanophotonic waveguides |
| topic | Optics |
| url | https://arxiv.org/abs/2506.17819 |