CUED Publications database

Surface Plasmon Polariton Graphene Photodetectors.

Echtermeyer, TJ and Milana, S and Sassi, U and Eiden, A and Wu, M and Lidorikis, E and Ferrari, AC (2016) Surface Plasmon Polariton Graphene Photodetectors. Nano Lett, 16. pp. 8-20.

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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 submicron 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 gives 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 biosensing with direct-electric-redout, eliminating the need of bulky optics.

Item Type: Article
Uncontrolled Keywords: graphene photodetection plasmonics sensor surface plasmon polariton Biosensing Techniques Graphite Light Metals Nanoparticles Nanotechnology Photons Surface Plasmon Resonance
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:29
Last Modified: 20 Jul 2018 20:22