Figure 3
Absorptance of thin film with complex refractive index. (a) Thin homogeneous film with complex refractive index m = n + iκ and thickness d is embedded between two semi-infinite dielectrics of refractive indices ni and ns, respectively. In (b-e), absorptance in the film is shown as a function of its optical constants for normal incident light. The wavelength is 900 nm, and the dielectric environment has ni = ns = 1. The film thicknesses d are 2, 10, 50, and 250 nm in panels b, c, d, and e, respectively. The dotted lines mark n = κ about which the shown absorption is nearly symmetric for the two thinnest films (b,c). In these cases, the absorptance reaches a peak value of close to 50% on the symmetry line. For the two thicker films (d,e), the peak height increases and additional maxima appear along the n-axis due to Fabry-Perot modes. (From Ref. [68])
Absorptance of thin film with complex refractive index. (a) Thin homogeneous film with complex refractive index m = n + iκ and thickness d is embedded between two semi-infinite dielectrics of refractive indices ni and ns, respectively. In (b-e), absorptance in the film is shown as a function of its optical constants for normal incident light. The wavelength is 900 nm, and the dielectric environment has ni = ns = 1. The film thicknesses d are 2, 10, 50, and 250 nm in panels b, c, d, and e, respectively. The dotted lines mark n = κ about which the shown absorption is nearly symmetric for the two thinnest films (b, c). In these cases, the absorptance reaches a peak value of close to 50% on the symmetry line. For the two thicker films (d, e), the peak height increases and additional maxima appear along the n-axis due to Fabry-Perot modes (From Ref. [68]).