Nanofilm-induced spectral tuning of third harmonic generation.
Nanofilm-induced spectral tuning of third harmonic generation.
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纳米膜引起的三次谐波产生的光谱调谐。
DOI：
10.1364/ol.42.001812
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发表时间：
2017
期刊：
影响因子：
3.6
通讯作者：
M. Schmidt
中科院分区：
文献类型：
--
作者：
S. Warren;M. Chemnitz;H. Schneidewind;R. Kostecki;H. Ebendorff‐Heidepriem;T. Monro;M. Schmidt
由于长相互作用长度和强模态约束，利用波导产生多模态三谐波是一种有效的频率转换方法。在这里，我们介绍了通过使用位于开放波导核心上的介电纳米膜来调节三次谐波相位匹配条件的概念。我们通过实验证明，氧化钽纳米膜涂层在暴露的核心光纤的核心允许调谐三次谐波波长超过30 nm，正如定性模拟证实的那样。由于其通用特性，所提出的调谐方案可以应用于任何形式的暴露核心波导，并将在显微镜，生物传感和量子光学等领域找到应用。
Intermodal third-harmonic generation using waveguides is an effective frequency conversion process due to the combination of long interaction lengths and strong modal confinement. Here we introduce the concept of tuning the third harmonic phase-matching condition via the use of dielectric nanofilms located on an open waveguide core. We experimentally demonstrate that tantalum oxide nanofilms coated onto the core of an exposed core fiber allow tuning the third harmonic wavelength over 30 nm, as confirmed by qualitative simulations. Due to its generic character, the presented tuning scheme can be applied to any form of exposed core waveguide and will find applications in fields including microscopy, biosensing, and quantum optics.