Over the past decade, remarkable advances have been realized in chip-based nonlinear photonic devices for classical and quantum applications in the near- and mid-infrared regimes. However, few demonstrations have been realized in the visible and near-visible regimes, primarily due to the large normal material group-velocity dispersion (GVD) that makes it challenging to phase match third-order parametric processes. In this paper, we show that exploiting dispersion engineering of higher-order waveguide modes provides waveguide dispersion that allows for small or anomalous GVD in the visible and near-visible regimes and phase matching of four-wave mixing processes. We illustrate the power of this concept by demonstrating in silicon nitride microresonators a near-visible mode-locked Kerr frequency comb and a narrowband photon-pair source compatible with Rb transitions. These realizations extend applications of nonlinear photonics towards the visible and near-visible regimes for applications in time and frequency metrology, spectral calibration, quantum information, and biomedical applications.

中文翻译：

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通过高阶模色散工程的可见非线性光子学

在过去的十年中，基于芯片的非线性光子器件在近红外和中红外条件下的经典和量子应用中取得了显着进步。但是，在可见光和近可见光条件下，几乎没有实现任何演示，这主要是由于大的正常材料组速度色散（GVD）使得相位匹配三阶参数过程具有挑战性。在本文中，我们表明，利用高阶波导模式的色散工程可以提供波导色散，从而在可见光和近可见光范围内允许较小或异常的GVD以及四波混频过程的相位匹配。我们通过在氮化硅微谐振器中演示近乎可见的锁模Kerr频率梳和与Rb跃迁兼容的窄带光子对源，来说明此概念的威力。这些实现将非线性光子学的应用扩展到可见光和近可见光范围，以用于时间和频率计量，光谱校准，量子信息和生物医学应用。