Broadband bright biphotons from periodically poled triple-resonance metasurface
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arXiv
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| Format: | Preprint |
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2025
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| author | Zhang, Jihua Shi, Chaoxin Ma, Jinyong Setzpfandt, Frank Pertsch, Thomas Bao, Chunxiong Zhang, Jianjun Sukhorukov, Andrey A. |
| author_facet | Zhang, Jihua Shi, Chaoxin Ma, Jinyong Setzpfandt, Frank Pertsch, Thomas Bao, Chunxiong Zhang, Jianjun Sukhorukov, Andrey A. |
| contents | Biphotons from spontaneous parametric down conversion with broad bandwidth are highly wanted in many quantum technologies. However, achieving broad bandwidth in both frequency and momentum while keeping a high rate remains a challenge for both conventional nonlinear crystals and recently emerging nonlinear metasurfaces. Here, we address this challenge by introducing a periodically poled triple-resonance metasurface (PPTM) incorporating a nano-grating atop a periodically poled LiNbO$_3$ thin film. PPTM supports high-Q guided mode resonances at pump, signal, and idler wavelengths meanwhile enabling quasi-phase matching between three guided modes in a broad frequency/momentum range. The predicted biphoton rate is over 100 MHz/mW with a frequency bandwidth of 165 nm around 1550 nm and a momentum bandwidth of $13^\circ \times 6^\circ$, improving the state-of-the-art by over three orders of magnitude in rate and one order of magnitude in bandwidths. This ultrathin broadband bright biphoton source could stimulate system-level miniaturization of various free-space quantum photonic technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_08990 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Broadband bright biphotons from periodically poled triple-resonance metasurface Zhang, Jihua Shi, Chaoxin Ma, Jinyong Setzpfandt, Frank Pertsch, Thomas Bao, Chunxiong Zhang, Jianjun Sukhorukov, Andrey A. Optics Quantum Physics Biphotons from spontaneous parametric down conversion with broad bandwidth are highly wanted in many quantum technologies. However, achieving broad bandwidth in both frequency and momentum while keeping a high rate remains a challenge for both conventional nonlinear crystals and recently emerging nonlinear metasurfaces. Here, we address this challenge by introducing a periodically poled triple-resonance metasurface (PPTM) incorporating a nano-grating atop a periodically poled LiNbO$_3$ thin film. PPTM supports high-Q guided mode resonances at pump, signal, and idler wavelengths meanwhile enabling quasi-phase matching between three guided modes in a broad frequency/momentum range. The predicted biphoton rate is over 100 MHz/mW with a frequency bandwidth of 165 nm around 1550 nm and a momentum bandwidth of $13^\circ \times 6^\circ$, improving the state-of-the-art by over three orders of magnitude in rate and one order of magnitude in bandwidths. This ultrathin broadband bright biphoton source could stimulate system-level miniaturization of various free-space quantum photonic technologies. |
| title | Broadband bright biphotons from periodically poled triple-resonance metasurface |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2502.08990 |