Cui Kaibo, Zhang Tianzhu, Rao Tao, Zhang Xianghui, Zhang Shunping, Xu Hongxing
School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University , Wuhan 430072, China.
Hubei Key Laboratory of Micro-Nanoelectronic Materials and Devices, School of Microelectronics, Hubei University, Wuhan 430062, China.
Nanophotonics. 2024 Jul 24;13(18):3403-3409. doi: 10.1515/nanoph-2024-0129. eCollection 2024 Aug.
High-order wave mixing in solid-state platforms gather increasing importance due to the development of advanced lasers and integrated photonic circuit for both classical and quantum information. However, the high-order wave mixing is generally inefficient in solids under weak pump. Here, we observed the presence of phase matching of five-wave mixing (5WM) propagating in a zinc oxide (ZnO) microwire. The 5WM signal is enhanced by 2-3 orders of magnitude under the phase matching conditions, reaching an absolute conversion efficiency of 1.7 × 10 when the peak pumping power density is about 10 W/cm. The propagation of multiple nonlinear signals, including sum frequency generation, third harmonic generation, four-wave mixing etc., benefited from both the large nonlinear coefficients and the wide transparent window of ZnO, implies the possibility of developing cascaded nonlinear process under higher pumping. This study enriches the ZnO platform for integrated nonlinear nanophotonics.
由于用于经典和量子信息的先进激光器及集成光子电路的发展，固态平台中的高阶波混频变得越来越重要。然而，在弱泵浦条件下，高阶波混频在固体中通常效率较低。在此，我们观察到在氧化锌（ZnO）微线中传播的五波混频（5WM）存在相位匹配。在相位匹配条件下，5WM信号增强了2至3个数量级，当峰值泵浦功率密度约为10 W/cm时，绝对转换效率达到1.7×10 。包括和频产生、三次谐波产生、四波混频等在内的多个非线性信号的传播，受益于ZnO的大非线性系数和宽透明窗口，这意味着在更高泵浦条件下开发级联非线性过程的可能性。这项研究丰富了用于集成非线性纳米光子学的ZnO平台。
