论文标题
从可见到电信波长的葡萄园中的第二谐波一代
Second-harmonic generation in germanium-on-insulator from visible to telecom wavelengths
论文作者
论文摘要
二阶$χ^{2} $进程是经典和量子光学领域中许多重要的非线性光学应用的基础。通常，$χ^{2} $过程仅在非中心对称介电介质中通过Anharmonic电子振荡在非中心的介电介质中表现出来，当时是由强烈的光场驱动时。由于反转对称性，传统上不被视为二阶非线性光学应用的理想候选者，例如硅（SI）和锗（GE）等组IV半导体。在这里，我们报告了在飞秒光学泵送下的Ge-On-On-on-On-On-on-on-numpulator（GOI）样品中对第二次谐波生成（SHG）的实验观察。特别是，我们通过泵送$ \ sim $$ 3000 $ nm来报告电信S波段中GOI样本中SHG信号的首次测量。
The second-order $χ^{2}$ process underpins many important nonlinear optical applications in the field of classical and quantum optics. Generally, the $χ^{2}$ process manifests itself only in a non-centrosymmetric dielectric medium via an anharmonic electron oscillation when driven by an intense optical field. Due to inversion symmetry, group-IV semiconductors like silicon (Si) and germanium (Ge) are traditionally not considered as ideal candidates for second-order nonlinear optics applications. Here, we report the experimental observation of the second-harmonic generation (SHG) in a Ge-on-insulator (GOI) sample under femtosecond optical pumping. Specially, we report the first-time measurement of the SHG signal from a GOI sample in the telecom S-band by pumping at $\sim$$3000$ nm.
