连续波泵浦下磷化镓光子晶体纳米腔的二次谐波产生
Second harmonic generation in gallium phosphide photonic crystal nanocavities with ultralow continuous wave pump power
摘要：
我们演示了在半导体磷化镓中制作的光子晶体纳米腔中的二次谐波产生。我们观察到在750 nm的二次谐波辐射与输入功率的只有耦合到腔和转换效率$P_{\rm out}/P_{\rm in, coupled}^2 = 430%/{\rm W}$的谐振腔。GaP的大电子带隙使吸收损耗最小化，从而允许高效转换。我们的研究结果是有前途的集成，低功率光源和片上减少输入功率在其他非线性过程。
英文摘要：
We demonstrate second harmonic generation in photonic crystal nanocavities fabricated in the semiconductor gallium phosphide. We observe second harmonic radiation at 750 nm with input powers of only nanowatts coupled to the cavity and conversion efficiency $P_{\rm out}/P_{\rm in, coupled}^2 = 430%/{\rm W}$. The large electronic band gap of GaP minimizes absorption loss, allowing efficient conversion. Our results are promising for integrated, low-power light sources and on-chip reduction of input power in other nonlinear processes.
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