Ultrafast optical pulse shaping using dielectric metasurfaces
Ultrafast optical pulse shaping using dielectric metasurfaces
复制标题
DOI：
10.1126/science.aav9632
复制
发表时间：
2019-05-31
期刊：
影响因子：
56.9
通讯作者：
Agrawal, Amit
中科院分区：
文献类型：
--
作者：
Divitt, Shawn;Zhu, Wenqi;Agrawal, Amit
超快激光器、啁啾脉冲放大器和频率梳技术的进步要求全新的脉冲调制策略能够支持前所未有的大带宽和高峰功率，同时保持高光谱分辨率。我们演示了如何利用电介质超颖表面来塑造近红外飞秒脉冲的时间轮廓。精细定制的脉冲整形操作，包括分裂，压缩，啁啾，和高阶失真，实现使用傅立叶变换设置嵌入超表面能够操纵，同时和独立地，脉冲的组成频率分量的幅度和相位。利用超表面来操纵光的时间特性，扩大了它们的影响，并在超快科学和技术领域开辟了新的前景。
Advances in ultrafast lasers, chirped pulse amplifiers, and frequency comb technology require fundamentally new pulse-modulation strategies capable of supporting unprecedentedly large bandwidth and high peak power while maintaining high spectral resolution. We demonstrate how dielectric metasurfaces can be leveraged to shape the temporal profile of a near-infrared femtosecond pulse. Finely tailored pulse-shaping operations, including splitting, compression, chirping, and higher-order distortion, are achieved using a Fourier-transform setup embedding metasurfaces able to manipulate, simultaneously and independently, the amplitude and phase of the constituent frequency components of the pulse. Exploiting metasurfaces to manipulate the temporal characteristics of light expands their impact and opens new vistas in the field of ultrafast science and technology.