Nonlinear plasmonic metasurfaces have recently attracted considerable interest, due to their potential for enabling nanoscale nonlinear optics. Here, we review the current progress in this topic while paying special attention to existing challenges. In order to limit our scope, we concentrate on nonlinear metasurfaces utilizing inter-particle and lattice effects and focus on metasurfaces operating close to visible and near-infrared frequencies. We will also critically discuss the short and longer term prospects of nonlinear metasurfaces to start rivaling traditional nonlinear materials in applications.

中文翻译：

---

非线性等离子体超表面

非线性等离子体超表面最近引起了相当大的兴趣，因为它们具有实现纳米级非线性光学的潜力。在这里，我们回顾了该主题的当前进展，同时特别关注现有挑战。为了限制我们的范围，我们专注于利用粒子间和晶格效应的非线性超表面，并专注于接近可见光和近红外频率的超表面。我们还将批判性地讨论非线性超表面的短期和长期前景，以开始在应用中与传统非线性材料竞争。