Advanced Materials

Enhanced Photoconductivity in Thin-Film Semiconductors Optically Coupled to Photonic Crystals

Authors

  • P. G. O'Brien,

    1. Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, ON M5S 3E4 (Canada)
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  • N. P. Kherani,

    1. The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, ON M5S 3G4 (Canada)
    2. Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, ON M5S 3E4 (Canada)
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  • S. Zukotynski,

    1. The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, ON M5S 3G4 (Canada)
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  • G. A. Ozin,

    1. Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6 (Canada)
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  • E. Vekris,

    1. Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6 (Canada)
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  • N. Tetreault,

    1. Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6 (Canada)
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  • A. Chutinan,

    1. Physics Department, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7 (Canada)
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  • S. John,

    1. Physics Department, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7 (Canada)
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  • A. Mihi,

    1. Centro de Tecnologtía Nanofotónica, Edificio I-4, Universidad Politécnica de Valencia, Camino de Vera s/n, E-46022 Valencia (Spain)
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  • H. Míguez

    1. Centro de Tecnologtía Nanofotónica, Edificio I-4, Universidad Politécnica de Valencia, Camino de Vera s/n, E-46022 Valencia (Spain)
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Errata

This article is corrected by:

  1. Errata: Enhanced Photoconductivity in Thin-Film Semiconductors Optically Coupled to Photonic Crystals Volume 19, Issue 24, 4326, Article first published online: 11 December 2007

  • GAO and SJ are Government of Canada Research Chairs in Materials Chemistry and Physics, respectively. GAO, NPK, SZ, and SJ are deeply indebted to the Natural Sciences and Engineering Research Council of Canada and the University of Toronto for financial support of this work. HM acknowledges partial funding provided by the Ramón Areces Foundation and the Spanish Ministry of Science and Education under grant MAT2005-03 028. The authors would like to thank Dr. Davit Yeghikyan and Dr. Stefan Costea for their assistance in carrying out the hydrogenated amorphous silicon depositions and the quantum efficiency measurements.

Abstract

The photoconductivity of a thin semiconductor film is enhanced by depositing a photonic crystal layer on its backside. As shown in the figure, simulations indicate that the enhanced photoconductivity arises from the resonant modes in the film–photonic-crystal constructs and exceeds the enhancement obtained by depositing a perfect mirror onto the film.

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