Studies on dielectric properties, opto-electrical parameters and electronic polarizability of thermally evaporated amorphous Cd50S50−xSex thin films

Study of optical properties of thermally evaporated ZnSe thin films annealed at different pulsed laser powers

“…Therefore, using equation (29) and ( ஶ ), the value of the plasma frequency (ω p ) can be calculated. The estimated values of (ω p ) for ZnSe thin films were listed in Table 2; they are relatively in good agreement with reported values for other chalcogenide semiconductors [60][61][62][63].…”

“…The small observed values of optical electronegativity ( ) and relatively high refractive index of ZnSe thin films may be due to their covalent nature [59]. According to Drude's theory of the dielectric materials, the ratio of the charge carrier concentration to the electron effective mass (N /m*) is given as follows [60][61][62]: * = ಮ ω ଶ…”

Linear electromagnetic wave equations in materials

“…Conversely, the scalar coefficient functions can be gained back from the original isotropic tensor through 14) where e(k) denotes an arbitrary vector which is transverse and normalized, i.e. it has the properties that e(k) · k = 0 and e(k) · e(k) = 1.…”

“…In fact, the problematic feature of the above definition (5.13) is that this is in general not equivalent to 14) unless the vector potential vanishes identically, A ≡ 0. In the most general case, the dielectric tensor has of course to be introduced via the linear expansion of the external in terms of the total electric field as in Eq.…”

“…19]). On the theoretical side, wave equations in media allow one to relate the speed of light in materials and hence the refractive index to electromagnetic response properties such as the dielectric function [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”