Surface Plasmon Polariton Graphene Photodetectors
| Autor: | Anna Eiden, Elefterios Lidorikis, Tim Echtermeyer, Mengfei Wu, Andrea C. Ferrari, Silvia Milana, U. Sassi |
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| Přispěvatelé: | Ferrari, Andrea [0000-0003-0907-9993], Apollo - University of Cambridge Repository |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Light Photodetector FOS: Physical sciences Physics::Optics Bioengineering 02 engineering and technology Biosensing Techniques 01 natural sciences 7. Clean energy plasmonics Responsivity Optics sensor 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Physics::Atomic and Molecular Clusters Nanotechnology General Materials Science Surface plasmon resonance 010306 general physics Plasmon photodetection Condensed Matter - Materials Science Plasmonic nanoparticles Photons Condensed Matter - Mesoscale and Nanoscale Physics business.industry Mechanical Engineering Surface plasmon graphene Materials Science (cond-mat.mtrl-sci) General Chemistry Surface Plasmon Resonance 021001 nanoscience & nanotechnology Condensed Matter Physics Surface plasmon polariton surface plasmon polariton Metals Optoelectronics Nanoparticles Graphite 0210 nano-technology business Localized surface plasmon |
| Popis: | The combination of plasmonic nanoparticles and graphene enhances the responsivity and spectral selectivity of graphene-based photodetectors. However, the small area of the metal-graphene junction, where the induced electron-hole pairs separate, limits the photoactive region to sub-micron length scales. Here, we couple graphene with a plasmonic grating and exploit the resulting surface plasmon polaritons to deliver the collected photons to the junction region of a metal-graphene-metal photodetector. This results into a 400% enhancement of responsivity and a 1000% increase in photoactive length, combined with tunable spectral selectivity. The interference between surface plasmon polaritons and the incident wave introduces new functionalities, such as light flux attraction or repulsion from the contact edges, enabling the tailored design of the photodetector's spectral response. This architecture can also be used for surface plasmon bio-sensing with direct-electric- readout, eliminating the need of complicated optics. |
| Databáze: | OpenAIRE |
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