title: Sand-castle biperiodic pattern for spectral and angular broadening of antireflective properties.
abstract: This Letter deals with the antireflective properties of top-patterned pyramids, looking like sand castles, bi-periodically repeated on a silicon surface. It is demonstrated numerically that such an original pattern allows a dramatic spectral and angular broadening of the antireflective efficiency. Design examples are given for wavelengths ranging from 0.5 microm to 5 microm and incidence angles of 30 degrees and 45 degrees. Applications of such antireflective surfaces on photodetectors and solar cells are soon expected.
authors.affiliation: Aix-Marseille University, Institut Matériaux Microélectronique Nanosciences de Provence-IM2NP CNRS UMR 6242, Campus de Saint-Jérôme, Avenue Escadrille Normandie Niemen-Service 231, F-13397 Marseille Cedex 20, France. ludovic.escoubas@univ-cezanne.fr
authors.forename: Ludovic
authors.initials: L
authors.lastname: Escoubas
authors.forename: Renaud
authors.initials: R
authors.lastname: Bouffaron
authors.forename: Vincent
authors.initials: V
authors.lastname: Brissonneau
authors.forename: Jean-Jacques
authors.initials: JJ
authors.lastname: Simon
authors.forename: Gérard
authors.initials: G
authors.lastname: Berginc
authors.forename: Francois
authors.initials: F
authors.lastname: Flory
authors.forename: Philippe
authors.initials: P
authors.lastname: Torchio