An Efficient Deep-Subwavelength Second Harmonic Nanoantenna Based on Surface Plasmon-Coupled Dilute Nitride GaNP Nanowires
An Efficient Deep-Subwavelength Second Harmonic Nanoantenna Based on Surface Plasmon-Coupled Dilute Nitride GaNP Nanowires
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基于表面等离子体耦合稀氮化物GaN纳米线的高效深亚波长二次谐波纳米天线
DOI：
10.1021/acs.nanolett.0c05115
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发表时间：
2021-04-19
期刊：
影响因子：
10.8
通讯作者：
Pan, Anlian
中科院分区：
文献类型：
--
作者：
Luo, Ziyu;Ma, Chao;Pan, Anlian
高折射率半导体纳米天线代表了非线性光子产生的强大平台。具有减小的占用面积的器件对于光子集成电路（PIC）中的更高集成容量和能量效率是关键的。在这里，我们报告的深亚波长非线性天线的基础上稀释氮化物GaNP纳米线（NWs），其二次谐波产生（SHG）显示了5倍的增加，通过将类似的0.45%的氮（N），在与GaP对应。进一步与基于金（Au）薄膜的混合腔集成，实现了类似于380倍的显著提升的SHG输出，非线性转换效率高达9.4 x 10（-6）W-1。此外，发现高密度锌双晶（ZB）双相通过偶极干涉来调整非线性辐射分布，从而产生非常适合与偏振纳米光学器件耦合的高度对称的偏振图案。我们的研究结果表明，稀氮化物纳米天线作为未来基于芯片的非线性光子技术的有前途的积木。
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 similar to 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 similar to 380, with a nonlinear conversion efficiency up to 9.4 x 10(-6) W-1. 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.