title: Mode-based analysis of silicon nanohole arrays for photovoltaic applications.
abstract: We investigate the optical properties of silicon nanohole arrays for application in photovoltaic cells in terms of the modes within the structure. We highlight three types of modes: fundamental modes, important at long wavelengths; guided resonance modes, which enhance absorption for wavelengths where the intrinsic absorption of silicon is low; and channeling modes, which suppress front-surface reflection. We use this understanding to explain why the parameters of optimized nanohole arrays occur in specific ranges even as the thickness is varied.
authors.forename: Justin L
authors.initials: JL
authors.lastname: Donnelly
authors.forename: Björn C P
authors.initials: BC
authors.lastname: Sturmberg
authors.forename: Kokou B
authors.initials: KB
authors.lastname: Dossou
authors.forename: Lindsay C
authors.initials: LC
authors.lastname: Botten
authors.forename: Ara A
authors.initials: AA
authors.lastname: Asatryan
authors.forename: Christopher G
authors.initials: CG
authors.lastname: Poulton
authors.forename: Ross C
authors.initials: RC
authors.lastname: McPhedran
authors.forename: C
authors.initials: C
authors.lastname: Martijn de Sterke