Luo Ziyu, Ma Chao, Lin Yue, Jiang Qi, Liu Binjie, Yang Xin, Yi Xiao, Qu Junyu, Zhu Xiaoli, Wang Xiao, Zhou Jun, Wang Xingjun, Chen Weimin M, Buyanova Irina A, Chen Shula, Pan Anlian
Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, People's Republic of China.
Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Nano Lett. 2021 Apr 28;21(8):3426-3434. doi: 10.1021/acs.nanolett.0c05115. Epub 2021 Apr 19.
High-index semiconductor nanoantennae represent a powerful platform for nonlinear photon generation. Devices with reduced footprints are pivotal for higher integration capacity and energy efficiency in photonic integrated circuitry (PIC). Here, we report on a deep subwavelength nonlinear antenna based on dilute nitride GaNP nanowires (NWs), whose second harmonic generation (SHG) shows a 5-fold increase by incorporating ∼0.45% of nitrogen (N), in comparison with GaP counterpart. Further integrating with a gold (Au) thin film-based hybrid cavity achieves a significantly boosted SHG output by a factor of ∼380, with a nonlinear conversion efficiency up to 9.4 × 10 W. In addition, high-density zinc blende (ZB) twin phases were found to tailor the nonlinear radiation profile via dipolar interference, resulting in a highly symmetric polarimetric pattern well-suited for coupling with polarization nano-optics. Our results manifest dilute nitride nanoantenna as promising building blocks for future chip-based nonlinear photonic technology.
高折射率半导体纳米天线是产生非线性光子的强大平台。尺寸更小的器件对于提高光子集成电路（PIC）的集成能力和能源效率至关重要。在此，我们报道了一种基于稀氮化物GaNP纳米线（NWs）的深亚波长非线性天线，与GaP对应物相比，通过掺入约0.45%的氮（N），其二阶谐波产生（SHG）增加了5倍。进一步与基于金（Au）薄膜的混合腔集成，可使SHG输出显著提高约380倍，非线性转换效率高达9.4×10 W。此外，发现高密度闪锌矿（ZB）孪晶相通过偶极干涉来调整非线性辐射分布，从而产生高度对称的偏振图案，非常适合与偏振纳米光学器件耦合。我们的结果表明，稀氮化物纳米天线是未来基于芯片的非线性光子技术的有前景的构建模块。
