Anthur Aravind P, Zhang Haizhong, Akimov Yuriy, Rong Ong Jun, Kalashnikov Dmitry, Kuznetsov Arseniy I, Krivitsky Leonid
Opt Express. 2021 Mar 29;29(7):10307-10320. doi: 10.1364/OE.409758.
We designed, fabricated and tested gallium phosphide (GaP) nano-waveguides for second harmonic generation (SHG). We demonstrate SHG in the visible range around 655 nm using modal phase matching. We observe phase matched SHG for different combinations of interacting modes by varying the widths of the waveguides and tuning the wavelength of the pump. We achieved a normalized internal SHG conversion efficiency of 0.4% Wcm for a continuous-wave pump at wavelength of 1283.5 nm, the highest reported in the literature for a GaP waveguide. We also demonstrated temperature tuning of the SHG wavelength with a slope of 0.17 nm/C. The presented results contribute to the development of integrated photonic platforms with efficient nonlinear wave-mixing processes for classical and quantum applications.
我们设计、制造并测试了用于二次谐波产生（SHG）的磷化镓（GaP）纳米波导。我们利用模式相位匹配在655nm左右的可见光范围内实现了二次谐波产生。通过改变波导宽度和调节泵浦波长，我们观察到了不同相互作用模式组合下的相位匹配二次谐波产生。对于波长为1283.5nm的连续波泵浦，我们实现了0.4%W/cm的归一化内部二次谐波转换效率，这是文献报道的GaP波导中的最高值。我们还展示了二次谐波产生波长的温度调谐，斜率为0.17nm/°C。所呈现的结果有助于开发用于经典和量子应用的具有高效非线性波混频过程的集成光子平台。
