Efficient second harmonic generation in nanophotonic GaAs-on-insulator waveguides.
Efficient second harmonic generation in nanophotonic GaAs-on-insulator waveguides.
复制标题
纳米光子绝缘体上砷化镓波导中的高效二次谐波产生。
作者：
E. Stanton;J. Chiles;N. Nader;G. Moody;N. Volet;L. Chang;J. Bowers;Sae Woo Nam;R. Mirin
非线性频率转换在提升下一代光学系统的功能方面发挥着至关重要的作用。便携式计量基准和量子网络将需要高效的二阶非线性器件，而纳米光子波导的强烈非线性相互作用可以用来满足这些要求。在这里，我们展示了二次谐波产生（SHG）在GaAs绝缘体波导前所未有的效率为40 W-1的单程设备。这一结果是通过最小化传播损耗和优化相位匹配来实现的。我们研究表面态吸收和设计的波导几何形状的模式相位匹配公差制造变化。一个2.0 µm的泵浦信号被转换为1.0 µm的信号，长度为2.9 mm，信号带宽为148 GHz。在45 °C的温度范围内可实现可调谐和高效工作，斜率为0.24 nm/°C。对GaAs和SiO2之间的晶片键合进行了优化，以最大限度地减少波导损耗，并且这些器件在76 mm晶片上制造，具有高均匀性。我们期望该器件能够实现完全集成的自参考频率梳和高速纠缠光子对产生。
Nonlinear frequency conversion plays a crucial role in advancing the functionality of next-generation optical systems. Portable metrology references and quantum networks will demand highly efficient second-order nonlinear devices, and the intense nonlinear interactions of nanophotonic waveguides can be leveraged to meet these requirements. Here we demonstrate second harmonic generation (SHG) in GaAs-on-insulator waveguides with unprecedented efficiency of 40 W-1 for a single-pass device. This result is achieved by minimizing the propagation loss and optimizing phase-matching. We investigate surface-state absorption and design the waveguide geometry for modal phase-matching with tolerance to fabrication variation. A 2.0 µm pump is converted to a 1.0 µm signal in a length of 2.9 mm with a wide signal bandwidth of 148 GHz. Tunable and efficient operation is demonstrated over a temperature range of 45 °C with a slope of 0.24 nm/°C. Wafer-bonding between GaAs and SiO2 is optimized to minimize waveguide loss, and the devices are fabricated on 76 mm wafers with high uniformity. We expect this device to enable fully integrated self-referenced frequency combs and high-rate entangled photon pair generation.
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影响因子：
4
作者：
Bruch, Alexander W.;Liu, Xianwen;Tang, Hong X.
通讯作者：
Tang, Hong X.
影响因子：
10.4
作者：
Lu, Juanjuan;Surya, Joshua B.;Tang, Hong X.
通讯作者：
Tang, Hong X.
DOI：
10.1038/lsa.2016.249
发表时间：
2017-05
期刊：
Light, science & applications
影响因子：
--
作者：
Guo X;Zou CL;Schuck C;Jung H;Cheng R;Tang HX
通讯作者：
Tang HX
影响因子：
10.4
作者：
Wang, Cheng;Langrock, Carsten;Loncar, Marko
通讯作者：
Loncar, Marko