论文标题
超掺杂的硅纳米antennas和可调节红外等离子体的元信息
Hyper-doped silicon nanoantennas and metasurfaces for tunable infrared plasmonics
论文作者
论文摘要
我们介绍了超掺杂硅纳米风克的有序阵列的实验实现，该阵列表现出局部的表面等离子体共振。通过调整10 $^{20} $和10 $^{21} $ cm $ $^{ - 3} $之间的自由载体浓度，可以在2至5 $μ$ m之间的光谱窗口中广泛调整等离子。我们表明，使用全硅等离子体跨面积可以实现强红色的光吸收，该元素采用尺寸低至100 \，直径为100 \，高度23 nm的纳米结构。我们的数值模拟与实验数据显示出非常一致的一致性，并提供了有关纳米结构形状以及近场对元图性能的影响的物理见解。我们的结果对基于全硅的集成等离激元设备（例如化学或生物传感或热成像进行）开辟了高度有希望的观点。
We present the experimental realization of ordered arrays of hyper-doped silicon nanodisks, which exhibit a localized surface plasmon resonance. The plasmon is widely tunable in a spectral window between 2 and 5 $μ$m by adjusting the free carrier concentration between 10$^{20}$ and 10$^{21}$ cm$^{-3}$. We show that strong infrared light absorption can be achieved with all-silicon plasmonic metasurfaces employing nano-structures with dimensions as low as 100\,nm in diameter and 23 nm in height. Our numerical simulations show an excellent agreement with the experimental data and provide physical insights on the impact of the nanostructure shape as well as of near-field effects on the optical properties of the metasurface. Our results open highly promising perspectives for integrated all-silicon-based plasmonic devices for instance for chemical or biological sensing or for thermal imaging.
