Ultrafast Optical Modulation of Second- and Third-Harmonic Generation from Cut-Disk-Based Metasurfaces
Ultrafast Optical Modulation of Second- and Third-Harmonic Generation from Cut-Disk-Based Metasurfaces
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DOI：
10.1021/acsphotonics.6b00108
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发表时间：
2016-08-01
期刊：
影响因子：
7
通讯作者：
Zayats, Anatoly V.
中科院分区：
文献类型：
--
作者：
Sartorello, Giovanni;Olivier, Nicolas;Zayats, Anatoly V.
我们设计并制作了一种由金切圆盘谐振器组成的亚表面，它具有很强的相干非线性响应。我们在亚皮秒时间尺度上实验演示了二次和三次谐波信号的全光调制。泵浦探测实验和数值模型表明，所观察到的效应是由于金属中的电子激发在外界照射下的超快响应。这些效应为开发具有可控和可切换相干非线性响应的新型有源非线性介面铺平了道路。
We design and fabricate a metasurface composed of gold cut-disk resonators that exhibits a strong coherent nonlinear response. We experimentally demonstrate all-optical modulation of both second- and third-harmonic signals on a subpicosecond time scale. Pump probe experiments and numerical models show that the observed effects are due to the ultrafast response of the electronic excitations in the metal under external illumination. These effects pave the way for the development of novel active nonlinear metasurfaces with controllable and switchable coherent nonlinear response.