论文标题
等离激元材料的瞬时扰动非线性响应
Transient perturbative nonlinear responses of plasmonic materials
论文作者
论文摘要
最近对等离子体材料的光学非线性的研究表明，它们的反应甚至超出了通常的扰动描述。为了更好地理解这些令人惊讶的强烈响应，我们在这里开发了一种简单但一般的方法来描述等离子材料的非线性光学响应，最高为$ n $ th的扰动顺序。我们采用该方法来理解在谐振跨面中发生的光谱扩展，并研究了从多元谐振的跨面上的高谐波产生增强，可预测更高谐波的超过百万倍的增强。
Recent investigations on optical nonlinearities of plasmonic materials suggest their responses may be even beyond the usual perturbative description. To better understand these surprisingly strong responses, we develop here a simple but general approach to describe the nonlinear optical response of plasmonic materials up to $n$th perturbation order. We apply the approach to understand spectral broadening occurring in resonant metasurfaces and investigate the enhancement of high-harmonic generation from multiply-resonant metasurfaces, predicting an over million-fold enhancement of higher harmonics.
