| Broadband light management using low-Q whispering gallery modes in spherical nanoshells. | |
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MedLine Citation:
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PMID: 22314360 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Light trapping across a wide band of frequencies is important for applications such as solar cells and photodetectors. Here, we demonstrate a new approach to light management by forming whispering-gallery resonant modes inside a spherical nanoshell structure. The geometry of the structure gives rise to a low quality-factor, facilitating the coupling of light into the resonant modes and substantial enhancement of the light path in the active material, thus dramatically improving absorption. Using nanocrystalline silicon (nc-Si) as a model system, we observe broadband absorption enhancement across a large range of incident angles. The absorption of a single layer of 50-nm-thick spherical nanoshells is equivalent to a 1-μm-thick planar nc-Si film. This light-trapping structure could enable the manufacturing of high-throughput ultra-thin film absorbers in a variety of material systems that demand shorter deposition time, less material usage and transferability to flexible substrates. |
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Authors:
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Yan Yao; Jie Yao; Vijay Kris Narasimhan; Zhichao Ruan; Chong Xie; Shanhui Fan; Yi Cui |
Publication Detail:
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Type: Journal Article Date: 2012-02-07 |
Journal Detail:
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Title: Nature communications Volume: 3 ISSN: 2041-1723 ISO Abbreviation: Nat Commun Publication Date: 2012 |
Date Detail:
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Created Date: 2012-02-08 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101528555 Medline TA: Nat Commun Country: England |
Other Details:
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Languages: eng Pagination: 664 Citation Subset: IM |
Affiliation:
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1] Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA. [2]. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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