Structured InP-based nanoantenna for photovoltaics applications

Nanoresonators are used in photovoltaic applications to reduce the absorber volume by confining the electromagnetic fields. We employed a two-dimensional Maxwell equation solver to investigate the optical performance of a fully structured InP-based nanoresonator, allowing high optical absorption and being electrically compatible. We demonstrated a 60% broadband optical efficiency with a good angle tolerance: more than 40% optical efficiency for an incidence angle between 60 deg and 60 deg. We also addressed the fabrication process in identifying the main barriers and in proposing technological solutions.