Absorption enhancing proximity effects in aperiodic nanowire arrays

Björn C. P. Sturmberg, Kokou B. Dossou, Lindsay C. Botten, Ara A. Asatryan, Christopher G. Poulton, Ross C. McPhedran, C. Martijn de Sterke
2013 Optics Express  
Aperiodic Nanowire (NW) arrays have higher absorption than equivalent periodic arrays, making them of interest for photovoltaic applications. An inevitable property of aperiodic arrays is the clustering of some NWs into closer proximity than in the equivalent periodic array. We focus on the modes of such clusters and show that the reduced symmetry associated with cluster formation allows external coupling into modes which are dark in periodic arrays, thus increasing absorption. To exploit such
more » ... odes fully, arrays must include tightly clustered NWs that are unlikely to arise from fabrication variations but must be created intentionally.
doi:10.1364/oe.21.00a964 pmid:24514937 fatcat:5r5ktoolizf6hjhasswiv67wsu