Ultrabroadband nonlinear optics in nanophotonic periodically poled lithium niobate waveguides
Ultrabroadband nonlinear optics in nanophotonic periodically poled lithium niobate waveguides
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DOI：
10.1364/optica.7.000040
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发表时间：
2020-01-20
期刊：
影响因子：
10.4
通讯作者：
Fejer, M. M.
中科院分区：
文献类型：
--
作者：
Jankowski, Marc;Langrock, Carsten;Fejer, M. M.
具有二次非线性的波导中的准相位匹配相互作用实现了高效的非线性频率转换。在本文中，我们展示了第一代设备，结合联合收割机的色散工程可在纳米光子波导与准相位匹配的非线性相互作用，可在周期性极化锂离子电池（PPLN）。这种组合使得飞秒脉冲的准静态相互作用成为可能，与传统设备相比，将脉冲能量需求降低了几个数量级，从皮焦耳到毫微微焦耳。我们实验证明了与二次谐波产生（SHG）相关的两个效应。首先，我们观察到有效的准相位匹配的SHG，
Quasi-phase-matched interactions in waveguides with quadratic nonlinearities enable highly efficient nonlinear frequency conversion. In this paper, we demonstrate the first generation of devices that combine the dispersion engineering available in nanophotonic waveguides with quasi-phase-matched nonlinear interactions available in periodically poled lithium niobate (PPLN). This combination enables quasi-static interactions of femtosecond pulses, reducing the pulse energy requirements by several orders of magnitude compared to conventional devices, from picojoules to femtojoules. We experimentally demonstrate two effects associated with second harmonic generation (SHG). First, we observe efficient quasi-phase-matched SHG with