Efficient, Broadband and Wide-Angle Hot-Electron Transduction using Metal-Semiconductor Hyperbolic Metamaterials
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2016-05-22Online Publication Date
2016-05-22Print Publication Date
2016-08Permanent link to this record
http://hdl.handle.net/10754/610556
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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 EnergyPublisher
Elsevier BVJournal
Nano EnergyAdditional Links
http://linkinghub.elsevier.com/retrieve/pii/S2211285516301598ae974a485f413a2113503eed53cd6c53
10.1016/j.nanoen.2016.05.037