Zhang Tianzhu, Li Haixia, Gao Yihua, Shi Zhifeng, Zhang Shunping, Xu Hongxing
School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, China.
Hubei Key Laboratory of Optical Information and Pattern Recognition, School of Mathematics and Physics, Wuhan Institute of Technology, Guanggu 1st Road 206, Wuhan 430205, China.
Nano Lett. 2023 Aug 9;23(15):6966-6972. doi: 10.1021/acs.nanolett.3c01589. Epub 2023 Jul 27.
Coherent multiwave mixing is in demand for optical frequency conversion, imaging, quantum information science, etc., but has rarely been demonstrated in solid-state systems. Here, we observed three- and five-wave mixing (5WM) in a -axis growth zinc oxide microwire on a Au film with picosecond pulses in the near-infrared region. An output 5WM of 4.7 × 10 μW, only 2-3 orders smaller than the three-wave mixing, is achieved when the excitation power is as low as 1.5 mW and the peak power density as weak as ∼10 W/cm. The excitation power dependence of 5WM agrees well with the perturbation limit under the low intensity but exhibits a strong deviation at a high pumping power. This extraordinary behavior is attributed to the cooperative resonant enhancement effect when pumping in the near-infrared range. Our study offers a potential solid-state platform for on-chip multiwave mixing and quantum nonlinear optics, such as generating many-photon entangled states or the construction of photon-photon quantum logic gates.
相干多波混频在光频率转换、成像、量子信息科学等领域有需求，但在固态系统中很少得到证实。在此，我们在金膜上的 轴生长氧化锌微线中，利用近红外区域的皮秒脉冲观察到了三波和五波混频（5WM）。当激发功率低至 1.5 mW 且峰值功率密度低至约 10 W/cm 时，实现了 4.7×10 μW 的输出 5WM，仅比三波混频小 2 - 3 个数量级。5WM 的激发功率依赖性在低强度下与微扰极限吻合良好，但在高泵浦功率下表现出强烈偏差。这种异常行为归因于在近红外范围内泵浦时的协同共振增强效应。我们的研究为片上多波混频和量子非线性光学提供了一个潜在的固态平台，例如生成多光子纠缠态或构建光子 - 光子量子逻辑门。
