Santiago-Cruz Tomás, Fedotova Anna, Sultanov Vitaliy, Weissflog Maximilian A, Arslan Dennis, Younesi Mohammadreza, Pertsch Thomas, Staude Isabelle, Setzpfandt Frank, Chekhova Maria
Max Planck Institute for the Science of Light, Staudtstraße 2, 91058 Erlangen, Germany.
University of Erlangen-Nürnberg, Staudtstraße 7/B2, 91058 Erlangen, Germany.
Nano Lett. 2021 May 26;21(10):4423-4429. doi: 10.1021/acs.nanolett.1c01125. Epub 2021 May 10.
All-dielectric optical metasurfaces are a workhorse in nano-optics, because of both their ability to manipulate light in different degrees of freedom and their excellent performance at light frequency conversion. Here, we demonstrate first-time generation of photon pairs via spontaneous parametric-down conversion in lithium niobate quantum optical metasurfaces with electric and magnetic Mie-like resonances at various wavelengths. By engineering the quantum optical metasurface, we tailor the photon-pair spectrum in a controlled way. Within a narrow bandwidth around the resonance, the rate of pair production is enhanced up to 2 orders of magnitude, compared to an unpatterned film of the same thickness and material. These results enable flat-optics sources of entangled photons-a new promising platform for quantum optics experiments.
全介质光学超表面是纳米光学领域的一项重要技术，这得益于它们在不同自由度上操控光的能力以及在光频率转换方面的出色表现。在此，我们首次展示了在具有不同波长的电和磁米氏型共振的铌酸锂量子光学超表面中，通过自发参量下转换产生光子对。通过设计量子光学超表面，我们以可控方式调整光子对光谱。在共振附近的窄带宽内，与相同厚度和材料的无图案薄膜相比，光子对产生率提高了多达2个数量级。这些结果为纠缠光子的平面光学源提供了可能——这是量子光学实验的一个新的有前景的平台。
