唤俊在武汉开上巡演了

The diffraction electromagnetic field is calculated by rigorous coupled-wave theory for a binary metallic grating of nanometric dimensions. We discuss in detail the influence of the ratio of grating ridge width to grating period, the depth of groves and the angle of incident wave for the enhancement of diffraction electromagnetic field. Calculations for silver grating and gold grating result in some important conclusions.

Phase eigenstates for the Landau system (planar charged particle moving in a uniform magnetic field) are built. It is convenient to use these states to describe the circular motion of the charged particle. The results obtained do not depend on gauges.