Mode-based analysis of silicon nanohole arrays for photovoltaic applications.

Publication Type:
Journal Article
Citation:
Optics express, 2014, 22 Suppl 5 pp. A1343 - A1354
Issue Date:
2014-08
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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.
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