Abstract
Graphene physics and plasmonics are two fields which, once combined, promise a variety of exciting applications. One of those applications is the integration of active nano-optoelectronic devices in electronic systems, using the fact that plasmons in graphene are tunable, highly confined and weakly damped. A crucial challenge remains before achieving these active devices: finding a platform enabling a high propagation of Graphene Plasmons Polaritons (GPPs). Suspended graphene presenting ultrahigh electron mobility has given rise to increasing interest. We numerically studied the plasmonic properties of suspended graphene. We propose a hybrid configuration and a set of conditions to launch graphene plasmons via an in-plane gold nanoantenna, for micrometric propagation of surface plasmons in suspended graphene. Finally, we propose a realistic optoelectronic device based on the use of suspended graphene.
Highlights
Electronic devices, used in telecommunications and information processing, exhibit inherent limitations due to the materials electronic losses and noises which have consequences on their conductivity
A crucial challenge remains before achieving these active devices: finding a platform enabling a high propagation of Graphene Plasmons Polaritons (GPPs)
While many promising properties like its ultimate thickness, transparency, ultra-high electronic mobility or mechanical strength have concentrated the efforts of numerous groups, a few pioneering groups have recently started considering and studying graphene for its optoelectronic [7] and plasmonic properties [8], opening new routes to ultimate optoelectronic nanodevices based on electron-photon interactions
Summary
Electronic devices, used in telecommunications and information processing, exhibit inherent limitations due to the materials electronic losses and noises which have consequences on their conductivity. In this context, some pioneer works [16, 17] using scattering-type scanning near-field optical microscope (sSNOM) succeeded in observing and studying IR plasmons in highly-doped graphene deposited on a substrate, paving the way for graphene plasmonics. Some pioneer works [16, 17] using scattering-type scanning near-field optical microscope (sSNOM) succeeded in observing and studying IR plasmons in highly-doped graphene deposited on a substrate, paving the way for graphene plasmonics Following these results, plasmonic switches and transistors [18,19,20,21] , light modulators [22,23,24,25,26,27], photodetectors [28], ring filters [29, 30], plasmonic lenses [31], logic gates [32, 33] and waveguides [34, 35] have been predicted numerically. We propose an experimental configuration which should in the near future confirm the possibility of making GPPs propagate over long distances, and making possible the design of optoelectronic devices based on suspended graphene
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