标题： n掺杂InAsSb薄膜中体等离子体的光激发：研究电子气的第二粘度 显示英文标题

标题： Optical excitation of bulk plasmons in n-doped InAsSb thin films : investigating the second viscosity in electron gas

摘要： 我们证明，在流体动力学模型中包含电子气体的第二粘度，可以对重掺杂半导体的光学响应进行高度精确的建模。 在我们的设置中，相比之前的方法，共振可见性得到改善，等离子体共振变得更加明显，从而允许对底层物理进行详细分析。 通过基于物理信息成本函数和定制优化算法的先进拟合技术，我们在不同样品厚度下获得了模拟与实验数据之间的良好一致。 这种增强的共振可见性，结合我们的综合方法，表明诸如掺杂水平和有效电子质量等关键参数可以从单一的光学测量中提取出来。 在流体动力学框架中考虑的空间色散对于准确描述该频率范围内等离子材料的光学响应至关重要，并可能成为一种标准建模方法。 显示英文摘要

摘要： We demonstrate that including the second viscosity of an electron gas in the hydrodynamic model allows for highly accurate modeling of the optical response of heavily doped semiconductors. In our setup, which improves resonance visibility compared to previous approaches, plasmon resonances become more distinct, allowing for detailed analysis of the underlying physics. With advanced fitting techniques based on a physics-informed cost function and a tailored optimization algorithm, we obtain close agreement between simulations and experimental data across different sample thicknesses. This enhanced resonance visibility, combined with our integrated approach, shows that key parameters such as doping level and effective electron mass can be retrieved from a single optical measurement. The spatial dispersion taken into account in the hydrodynamic framework is essential for accurately describing the optical response of plasmonic materials in this frequency range and is likely to become a standard modeling approach.