2017/12/25 by Luis Guillermo Mendoza‐Luna, Mendoza-Luna, Luis Guillermo, Eva Mayra Rojas-Ruiz +3
Engineering · Materials Science · #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Gold and Silver Nanoparticles Synthesis and Applications #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Metamaterials and Metasurfaces Applications #Plasmonic and Surface Plasmon Research
paper · pdf · doi:10.48550/arxiv.1712.09140
openalex publication_date 2017/12/25 · openalex created_date 2018/01/05 · openalex updated_date 2026/07/28
We report the absorption/transmission properties of thin copper films slightly below the percolation limit produced by laser ablation; these samples show randomly positioned islands. Two types of films are grown: in the first type, copper is deposited on glass, and it is shown that as the amount of deposited copper approaches the percolation limit, the samples show enhanced light transmission; in the second set of samples, made of TiO2/Cu/TiO2 layers, the presence of titanium oxide inhibits light transmission enhancement, even though the same amount of copper has been deposited compared to the samples deposited on glass. We also present numerical calculations based on the discrete dipole method to simulate the optical behaviour of the copper films. The enhanced light transmission of the samples presented in this work resembles the Extraordinary Optical Transmission (EOT) observed in periodic metallic structures. The similarities and differences between experiment and numerical calculations and the possible use of these films as sensors are discussed.