Center for Photonics and Multiscale Nanomaterials, University of Michigan, Ann Arbor, 48109, USA.
Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
Science. 2018 Oct 26;362(6413):439-442. doi: 10.1126/science.aat5915.
Synchrotron radiation-namely, electromagnetic radiation produced by charges moving in a curved path-is regularly generated at large-scale facilities where giga-electron volt electrons move along kilometer-long circular paths. We use a metasurface to bend light and demonstrate synchrotron radiation produced by a subpicosecond pulse, which moves along a circular arc of radius 100 micrometers inside a nonlinear crystal. The emitted radiation, in the terahertz frequency range, results from the nonlinear polarization induced by the pulse. The generation of synchrotron radiation from a pulse revolving about a circular trajectory holds promise for the development of on-chip terahertz sources.
同步加速器辐射，即电荷沿弯曲路径运动产生的电磁辐射，通常在大型设施中产生，在这些设施中，千兆电子伏特的电子沿着长达数公里的圆形路径运动。我们使用超表面来弯曲光，并展示了由皮秒脉冲产生的同步加速器辐射，该脉冲沿着非线性晶体内部的半径为 100 微米的圆弧运动。在太赫兹频率范围内发射的辐射是由脉冲引起的非线性极化产生的。从旋转圆形轨迹的脉冲产生同步加速器辐射有望开发出片上太赫兹源。
