Showing papers by "Nuno M. R. Peres published in 2016"
01 Jun 2016
TL;DR: In this paper, the authors acknowledge the Calouste Gulbenkian Foundation for financial support through the grant "Premio Estimulo a Investigacao 2013 "1 (No. 132394) and the hospitality of the Centre of Physics of the University of Minho, where most of this book was written.
Abstract: Paulo Andre Goncalves acknowledges the Calouste Gulbenkian Foundation for financial support through the grant “Premio Estimulo a Investigacao 2013 "1 (No. 132394) and the hospitality of the Centre of Physics of the University of Minho, where most of this book was written. Nuno Peres acknowledges financial support from the Graphene Flagship Project (Contract No. CNECT-ICT-604391).
228 citations
TL;DR: In this article, a self-contained introduction to plasmonics in graphene is presented, which can be read in two different ways: reading only the chapters to get acquainted with the field and reading the chapters and studying the appendices to get a working knowledge of the topic.
Abstract: This book is meant as an introduction to graphene plasmonics and aims at the advanced undergraduate and graduate students entering the field of plasmonics in graphene. In it different theoretical methods are introduced, starting with an elementary description of graphene plasmonics and evolving towards more advanced topics. This book is essentially self-contained and brings together a number of different topics about the field that are scattered in the vast literature. The text is composed of eleven chapters and of a set of detailed appendices. It can be read in two different ways: Reading only the chapters to get acquainted with the field of plasmonics in graphene or reading the chapters and studying the appendices to get a working knowledge of the topic. The study of the material in this book will bring the students to the forefront of the research in this field.
162 citations
TL;DR: In this article, an alternative architecture for graphene EGFET is presented, where source, drain, and gate are in the same plane, eliminating the need for an external gate electrode and the use of an additional reservoir to confine the electrolyte inside the transistor active zone.
Abstract: Ten years have passed since the beginning of graphene research. In this period we have witnessed breakthroughs both in fundamental and applied research. However, the development of graphene devices for mass production has not yet reached the same level of progress. The architecture of graphene field-effect transistors (FET) has not significantly changed, and the integration of devices at the wafer scale has generally not been sought. Currently, whenever an electrolyte-gated FET (EGFET) is used, an external, cumbersome, out-of-plane gate electrode is required. Here, an alternative architecture for graphene EGFET is presented. In this architecture, source, drain, and gate are in the same plane, eliminating the need for an external gate electrode and the use of an additional reservoir to confine the electrolyte inside the transistor active zone. This planar structure with an integrated gate allows for wafer-scale fabrication of high-performance graphene EGFETs, with carrier mobility up to 1800 cm(2) V(-1) s(-1). As a proof-of principle, a chemical sensor was achieved. It is shown that the sensor can discriminate between saline solutions of different concentrations. The proposed architecture will facilitate the mass production of graphene sensors, materializing the potential of previous achievements in fundamental and applied graphene research.
39 citations
TL;DR: The proposed architecture will facilitate the mass production of graphene sensors, materializing the potential of previous achievements in fundamental and applied graphene research.
Abstract: Ten years have passed since the beginning of graphene research. In this period we have witnessed breakthroughs both in fundamental and applied research. However, the development of graphene devices for mass production has not yet reached the same level of progress. The architecture of graphene field-effect transistors (FET) has not significantly changed, and the integration of devices at the wafer scale has generally not been sought. Currently, whenever an electrolyte-gated FET (EGFET) is used, an external, cumbersome, out-of-plane gate electrode is required. Here, an alternative architecture for graphene EGFET is presented. In this architecture, source, drain, and gate are in the same plane, eliminating the need for an external gate electrode and the use of an additional reservoir to confine the electrolyte inside the transistor active zone. This planar structure with an integrated gate allows for wafer-scale fabrication of high-performance graphene EGFETs, with carrier mobility up to 1800 cm2 V-1 s-1. As a proof-of principle, a chemical sensor was achieved. It is shown that the sensor can discriminate between saline solutions of different concentrations. The proposed architecture will facilitate the mass production of graphene sensors, materializing the potential of previous achievements in fundamental and applied graphene research.
30 citations
TL;DR: In this paper, a quasi-analytic model was proposed to describe the plasmonic eigenmodes in such a system, including the complete determination of their spectrum and corresponding induced potential and electric-field distributions.
Abstract: The ability to effectively guide electromagnetic radiation below the diffraction limit is of the utmost importance in the prospect of all-optical plasmonic circuitry. Here, we propose an alternative solution to conventional metal-based plasmonics by exploiting the deep subwavelength confinement and tunability of graphene plasmons guided along the apex of a graphene-covered dielectric wedge or groove. In particular, we present a quasi-analytic model to describe the plasmonic eigenmodes in such a system, including the complete determination of their spectrum and corresponding induced potential and electric-field distributions. We have found that the dispersion of wedge/groove graphene plasmons follows the same functional dependence as their flat-graphene plasmon counterparts, but now scaled by a (purely) geometric factor in which all the information about the system’s geometry is contained. We believe our results pave the way for the development of novel custom-tailored photonic devices for subwavelength wa...
28 citations
TL;DR: In this article, the Center for Nanostructured Graphene is sponsored by the Danish National Research Foundation, Project DNRF103 and the European Commission through the project "GrapheneDriven Revolutions in ICT and Beyond".
Abstract: The authors thank N. Asger Mortensen for insightful and valuable comments. PADG acknowledges financial support from Fundacao para a Ciencia e a Tecnologia (Portugal) from grant No. PD/BI/114376/2016. NMRP and YVB acknowledge financial support from the European Commission through the project “GrapheneDriven Revolutions in ICT and Beyond” (Ref. No. 696656). This work was partially supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Financing UID/FIS/04650/2013. The Center for Nanostructured Graphene is sponsored by the Danish National Research Foundation, Project DNRF103.
25 citations
TL;DR: T.G.R. as discussed by the authors gratefully acknowledges the support of the Royal Society (U.K.) through a Royal Society University Research Fellowship and N. M. R. Peres acknowledges the hospitality of UFRJ where this work has started.
Abstract: T.G.R. acknowledges support from the Newton Fund and the Royal Society (U.K.) through the Newton Advanced Fellowship scheme (ref. NA150043). A.F. gratefully acknowledges the financial support of the Royal Society (U.K.) through a Royal Society University Research Fellowship. N. M. R. Peres acknowledges the hospitality of UFRJ where this work has started and financial support from the European Commission through the project “Graphene-Driven Revolutions in ICT and Beyond” (Ref. No. 696656). T. G. R, N. M. R. P, J. M. V. P. L. thank Brazil Science without Borders program and CNPq for financial support.
14 citations
TL;DR: In this paper, the authors acknowledge support from the EC under the Graphene Flagship (Contract No. CNECT-ICT-649953) for the development of Graphenes.
Abstract: We acknowledge support from the EC under the Graphene Flagship (Contract No. CNECT-ICT-649953).
13 citations
TL;DR: Ribeiro and Peres as mentioned in this paper acknowledge the support of EC under Graphene Flagship (Contract No. CNECT-ICT-604391) for the FCT project EXPL-FIS-NAN1728-2013.
Abstract: B. Amorim acknowledges financial support from Fundacao para a Ciencia e a Tecnologia (Portugal), through Grant No. SFRH/BD/78987/2011. R.M. Ribeiro and N.M.R. Peres acknowledge the financial support of EC under Graphene Flagship (Contract No. CNECT-ICT-604391). N. M. R. Peres acknowledges financial support from the FCT project EXPL-FIS-NAN1728-2013.
12 citations
TL;DR: Chaves et al. as discussed by the authors acknowledge support from the European Commission through the project "Graphene-Driven Revolutions in ICT and Beyond" (Ref. No.
Abstract: A. J. Chaves acknowledges the scholarship from the Brazilian agency CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico). N.M.R. Peres acknowledges support from the European Commission through the project “Graphene-Driven Revolutions in ICT and Beyond" (Ref. No. 696656) and the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Financing UID/FIS/04650/2013. The authors acknowledge Jose Carlos Viana Gomes for discussions that led to the estimations made in Sec. VIII.
10 Jul 2016
TL;DR: In this paper, surface plasmon-polaritons (SPPs) supported by the latter in the terahertz (THz) spectral range were used for cloaking in a certain THz frequency range.
Abstract: Several potentially interesting plasmonic effects can arise from combining graphene with polarisable nanoparticles (NPs), such as metallic or dielectric spheres, related to surface plasmon-polaritons (SPPs) supported by the latter in the terahertz (THz) spectral range. Owing to the electromagnetic coupling between the graphene SPPs and dipole moments of polarisable (nano-) particles deposited on top of it, the optical properties of such a composite system have some new features as compared to its constituents. First, the NP's polarizability is renormalized due to the electromagnetic back action of SPPs which are excited in graphene when an external propagating electromagnetic wave impinges on the particle. The coupling also results in a considerable enhancement of the THz radiation absorption in graphene, while the reflection drops to zero. This effect can be potentially interesting e.g. for cloaking in a certain THz frequency range.
TL;DR: In this paper, a quasi-analytic model was proposed to describe the plasmonic eigenmodes in such a system, including the complete determination of their spectrum and corresponding induced potential and electric field distributions.
Abstract: The ability to effectively guide electromagnetic radiation below the diffraction limit is of the utmost importance in the prospect of all-optical plasmonic circuitry. Here, we propose an alternative solution to conventional metal-based plasmonics by exploiting the deep subwavelength confinement and tunability of graphene plasmons guided along the apex of a graphene-covered dielectric wedge or groove. In particular, we present a quasi-analytic model to describe the plasmonic eigenmodes in such a system, including the complete determination of their spectrum and corresponding induced potential and electric field distributions. We have found that the dispersion of wedge/groove graphene plasmons follows the same functional dependence as their flat-graphene plasmons counterparts, but now scaled by a (purely) geometric factor in which all the information about the system's geometry is contained. We believe our results pave the way for the development of novel custom-tailored photonic devices for subwavelength waveguiding and localization of light based on recently discovered 2D materials.