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    Efficient, Broadband and Wide-Angle Hot-Electron Transduction using Metal-Semiconductor Hyperbolic Metamaterials

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    Type
    Article
    Authors
    Sakhdari, Maryam
    Hajizadegan, Mehdi
    Farhat, Mohamed
    Chen, Pai-Yen
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Date
    2016-05-22
    Online Publication Date
    2016-05-22
    Print Publication Date
    2016-08
    Permanent link to this record
    http://hdl.handle.net/10754/610556
    
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    Abstract
    Hot-electron devices are emerging as promising candidates for the transduction of optical radiation into electrical current, as they enable photodetection and solar/infrared energy harvesting at sub-bandgap wavelengths. Nevertheless, poor photoconversion quantum yields and low bandwidth pose fundamental challenge to fascinating applications of hot-electron optoelectronics. Based on a novel hyperbolic metamaterial (HMM) structure, we theoretically propose a vertically-integrated hot-electron device that can efficiently couple plasmonic excitations into electron flows, with an external quantum efficiency approaching the physical limit. Further, this metamaterial-based device can have a broadband and omnidirectional response at infrared and visible wavelengths. We believe that these findings may shed some light on designing practical devices for energy-efficient photodetection and energy harvesting beyond the bandgap spectral limit.
    Citation
    Efficient, Broadband and Wide-Angle Hot-Electron Transduction using Metal-Semiconductor Hyperbolic Metamaterials 2016 Nano Energy
    Publisher
    Elsevier BV
    Journal
    Nano Energy
    DOI
    10.1016/j.nanoen.2016.05.037
    Additional Links
    http://linkinghub.elsevier.com/retrieve/pii/S2211285516301598
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.nanoen.2016.05.037
    Scopus Count
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    Articles; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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