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The propagating behaviours,i.e.phase shift,transmissivity,reflectivity and absorp-tivity,of an electromagnetic (EM) wave in a two-dimensional atmospheric pressure plasma layerare described by the numerical solutions of integral-differential Maxwell’s equations through ageneralized finite-difference-time-domain (FDTD) algorithm.These propagating behaviours arefound to be strongly affected by five factors:two EM wave characteristics relevant to the obliqueincident and three dimensionless factors.The two EM wave factors are the polarization mode(TM mode or TE mode) and its incident angle.The three dimensionless factors are:the ratio ofthe maximum electron density to the critical density n_0/n_(cr),the ratio of the plasma layer widthto the wave length d/λ,and the ratio of the collision frequency between electrons and neutrals tothe incident wave frequency v_(e0)/f.
The propagating behaviors, iephase shift, transmissivity, reflectivity and absorp-tivity, of an electromagnetic (EM) wave in a two-dimensional atmospheric pressure plasma layerare described by the numerical solutions of integral-differential Maxwell’s equations through ageneralized finite-difference-time -domain (FDTD) algorithm. These propagating behaviors arefound to be strongly affected by five factors: two EM wave characteristics relevant to the obliqueincident and three dimensionless factors. The two EM wave factors are in the polarization mode (TM mode or TE mode) and its incident angle. The three dimensionless factors are: the ratio ofthe maximum electron density to the critical density n_0 / n_ (cr), the ratio of the plasma layer widthto the wave length d / λ, and the ratio of the collision frequency between electrons and neutrals tothe incident wave frequency v_ (e0) / f.