Absorption enhancement in thin-film photoluminescence layers with metal nanoparticles inter-coupling engineering

作者：Yadollahzadeh Sajjad^*; Alavizadeh Saba; Baghban Hamed

来源：Optics and Spectroscopy, 2015, 118(6): 930-935.

DOI：10.1134/S0030400X15060181

We analyze the enhancement in optical absorption of a photoluminescence ZnS layer with embedded spherical metal nanoparticles (MNPs). Using introduced optical model based on the boundary element method (BEM), the so-called scattering cross-section over absorption cross-section (SCS/ACS) ratio has been defined that represents the strength of re-absorption by scattering. According to the collective behavior of the interacting plasmonic nanoparticles in an array, an optimum SCS/ACS is obtained for inter-particle distance over the particle diameter. This parameter gives a hint for the nanoparticle density and size in practical applications and is consistent for all of the metallic nanoparticles.

• 出版日期2015-6