Optical properties of metallic films for vertical-cavity optoelectronic devices

Aleksandar D. Rakić, Aleksandra B. Djurišić, Jovan M. Elazar, Marian L. Majewski
1998 Applied Optics  
We present models for the optical functions of 11 metals used as mirrors and contacts in optoelectronic and optical devices: noble metals ͑Ag, Au, Cu͒, aluminum, beryllium, and transition metals ͑Cr, Ni, Pd, Pt, Ti, W͒. We used two simple phenomenological models, the Lorentz-Drude ͑LD͒ and the Brendel-Bormann ͑BB͒, to interpret both the free-electron and the interband parts of the dielectric response of metals in a wide spectral range from 0.1 to 6 eV. Our results show that the BB model was
more » ... he BB model was needed to describe appropriately the interband absorption in noble metals, while for Al, Be, and the transition metals both models exhibit good agreement with the experimental data. A comparison with measurements on surface normal structures confirmed that the reflectance and the phase change on reflection from semiconductor-metal interfaces ͑including the case of metallic multilayers͒ can be accurately described by use of the proposed models for the optical functions of metallic films and the matrix method for multilayer calculations.
doi:10.1364/ao.37.005271 pmid:18286006 fatcat:ybrkradhvnhknjqrsx3l6fyulq