Size-dependent permittivity and intrinsic optical anisotropy of nanometric gold thin films: a density functional theory study.

Physical properties of materials are known to be different from the bulk at the nanometer scale. In this context, the dependence of optical properties of nanometric gold thin films with respect to film thickness is studied using density functional theory (DFT). We find that the in-plane plasma frequency of the gold thin film decreases with decreasing thickness and that the optical permittivity tensor is highly anisotropic as well as thickness dependent.

Perfectly matched layer absorption boundary condition in planewave based transfer-scattering matrix method for photonic crystal device simulation.

The performance of the perfectly matched layer absorption boundary condition is fully exploited when it is applied to the planewave based transfer-scattering matrix method in photonic crystal device simulation. The mode profile of one dimensional dielectric waveguide and the optical properties of sub-wavelength aluminum grating with semi-infinite substrate are studied to illustrate the accuracy and power of this approach.

Higher-order incidence transfer matrix method used in three-dimensional photonic crystal coupled-resonator array simulation.

The plane-wave-based transfer matrix method with rational function interpolation and higher-order plane-wave incidence is proposed as an efficient calculation approach to simulate three-dimensional photonic crystal devices. As an example, the dispersion relations and quality factors are calculated for resonant cavity arrays embedded in a woodpile photonic crystal. An interesting ultraslow negative group velocity is observed in this structure.

High-efficiency calculations for three-dimensional photonic crystal cavities.

A numerical method was developed by combining a plane-wave-based transfer matrix method and a robust rational function interpolation algorithm. The optical properties of three-dimensional photonic crystal cavities were extracted in a short computation time with high numerical accuracy.