A new scheme of Raman scattering of a laser by THz graphene plasmons in the presence of both space charge and electromagnetic surface plasmons is proposed. Plasmon–laser coupling arises through the two dimensional response of electrons in graphene. For optical frequency laser scattering by THz plasmons, phase matching conditions are satisfied for near normal incidence and the Raman scattered wave also propagates normal to the graphene surface. The amplitude of the electric field of the Raman scattered wave scales linearly with the plasmon density fluctuation level and laser amplitude and inversely with the electron effective mass. Raman scattering would provide in situ diagnostics of the amplitude and frequency of the THz wave.

中文翻译：

---

石墨烯等离子体的激光拉曼散射

提出了一种在空间电荷和电磁表面等离子体同时存在的情况下，由太赫兹石墨烯等离子体对激光进行拉曼散射的新方案。等离子体-激光耦合是通过石墨烯中电子的二维响应产生的。对于太赫兹等离子体的光频激光散射，接近垂直入射满足相位匹配条件，拉曼散射波也垂直于石墨烯表面传播。拉曼散射波的电场幅度与等离子体密度波动水平和激光幅度成线性比例，与电子有效质量成反比。拉曼散射将提供太赫兹波的幅度和频率的原位诊断。