Kumar Pawan, Kumar Manish, Tripathi V K
Opt Lett. 2016 Apr 1;41(7):1408-11. doi: 10.1364/OL.41.001408.
A new mechanics of linear mode conversion of terahertz (THz) radiation into THz surface magnetoplasmons on a rippled surface of magnetized n-InSb is proposed. The normally incident THz radiation, polarized in the direction of a ripple wave vector, imparts oscillatory velocity to electrons in the ripple layer. This velocity beats with surface ripple to produce a nonlinear current that resonantly drives the THz surface magnetoplasmons. In the presence of an applied magnetic field, the surface plasmon (SP) mode splits into two modes-an upper mode and a lower mode. The amplitude of the SP for the upper branch mode is higher than that for the lower mode.
提出了一种新的机制，用于在磁化n-InSb的波纹表面上，将太赫兹（THz）辐射线性模式转换为THz表面磁等离子体激元。垂直入射的、沿波纹波矢方向极化的THz辐射，会赋予波纹层中的电子振荡速度。该速度与表面波纹相互作用，产生一个非线性电流，该电流会共振驱动THz表面磁等离子体激元。在施加磁场的情况下，表面等离子体激元（SP）模式会分裂为两种模式——一种是上分支模式，另一种是下分支模式。上分支模式的SP幅度高于下分支模式。
