Analysis of enhanced absorption in dense silicon nanowire arrays

Björn C. P. Sturmberg, Kokou B. Dossou, Lindsay C. Botten, Ara A. Asatryan, Christopher G. Poulton, C. Martijn de Sterke, Ross C. McPhedran

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

We analyze the absorption of solar radiation by dense silicon nanowire arrays, which are being considered for use in solar cells. Though it is known that these structures absorb sunlight much more efficiently than bulk silicon, the mechanism is complicated and not understood. Using a novel, semi-analytic model, we show that the enhanced absorption can be attributed to a few modes of the array, which couple well to incident light, overlap well with the silicon, and exhibit strong Fabry-Pérot resonances. For some frequencies the absorption is further enhanced by slow light effects.
Original languageEnglish
Title of host publicationProceedings of the International Quantum Electronics Conference and Conference on Lasers and Electro-Optics Pacific Rim 2011
PublisherOSA - The Optical Society
Pages1136-1138
Number of pages3
ISBN (Print)9780977565771
Publication statusPublished - 2011
Externally publishedYes
EventInternational Quantum Electronics Conference and Conference on Lasers and Electro-Optics Pacific Rim - Sydney
Duration: 28 Aug 20111 Sep 2011

Conference

ConferenceInternational Quantum Electronics Conference and Conference on Lasers and Electro-Optics Pacific Rim
CitySydney
Period28/08/111/09/11

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