Improving the Performance of Transparent Enclosure Using Heterogeneous Deposition of a Gold Nanolayer

In this letter, a practical method of enhancing the performance of optically transparent enclosures is presented. The proposed method involves homogeneous and heterogeneous gold nanolayer deposition by the thermal evaporation technique. Certainly, gold nanolayer films of various thicknesses are deposited on the patterned indium tin oxide (ITO) glass panels, and then by making a tradeoff between optical transparency and shielding effectiveness (SE), an optimized gold film thickness is selected. The results confirm the effectiveness of the proposed method and show 9 nm gold-deposited ITO enclosure, which provides significant electromagnetic shielding. Finally, the heterogeneous deposition technique is used to improve optical transparency. In this technique, a 9 nm gold film is deposited on the location where the current density is high. SE of this case is improved (about 12 dB better than the ITO enclosure at the resonance frequency), while optical transparency is sustained. To assess the method, the final results of copper, ITO, as well as homogeneous and heterogeneous gold-deposited enclosures is compared.