We report the theoretical prediction and experimental realization of the optical phenomenon of “ballistic resonance.” This resonance, resulting from the interplay between free charge motion in confining geometries and periodic driving electromagnetic fields, can be utilized to achieve negative permittivity at frequencies well above the bulk plasma frequency. As a proof of principle, we demonstrate all-semiconductor hyperbolic metamaterials operating at frequencies 60% above the plasma frequency of the constituent doped semiconductor “metallic” layer. Ballistic resonance will therefore enable the realization and deployment of various applications that rely on local field enhancement and emission modulation, typically associated with plasmonic materials, in new materials platforms.

中文翻译：

---

弹道超材料

我们报告“弹道共振”光学现象的理论预测和实验实现。这种由有限的几何形状中的自由电荷运动与周期性驱动电磁场之间的相互作用所引起的共振可以用来在远高于整体等离子体频率的频率处实现负介电常数。作为原理上的证明，我们演示了全半导体双曲超材料，其工作频率比组成掺杂的半导体“金属”层的等离子体频率高60％。因此，弹道共振将使新材料平台中依赖于局部场增强和发射调制（通常与等离子材料相关联）的各种应用得以实现和部署。