Publications de Michele Tamagnone

Nonlinear THz spectroscopy and simulation of gated graphene

Matthias Gäumann, Juan Ramon Mosig, Michele Tamagnone

We studied the nonlinear optical properties of single layer graphene using high terahertz (THz) fields. With the use of a back gate and cooling down the sample to cryogenic temperatures we are able to spectrally probe the nonlinear THz properties of intrin ...

IOP PUBLISHING LTD2018

Modulated scattering technique in the terahertz domain enabled by current actuated vanadium dioxide switches

Juan Ramon Mosig, Anja Skrivervik, Mihai Adrian Ionescu, Wolfgang Amadeus Vitale, Michele Tamagnone, Santiago Capdevila Cascante

The modulated scattering technique is based on the use of reconfigurable electromagnetic scatterers, structures able to scatter and modulate an impinging electromagnetic field in function of a control signal. The modulated scattering technique is used in a ...

Nature Research2017

Shunt capacitive switches based on VO2 metal insulator transition for RF phase shifter applications

Mihai Adrian Ionescu, Andreas Schueler, Josef Andreas Schuler, Montserrat Fernandez-Bolanos Badia, Wolfgang Amadeus Vitale, Emanuele Andrea Casu, Mariazel de la Candelas Maqueda López, Michele Tamagnone, Nicolò Oliva, Anna Krammer

IEEE2017

Tri-Band, Polarization-Independent Reflectarray at Terahertz Frequencies: Design, Fabrication, and Measurement

Juan Ramon Mosig, Anja Skrivervik, Julien Perruisseau-Carrier, Mihai Adrian Ionescu, Clara-Fausta Moldovan, Hamed Hasani, Pietro Maoddi, Michele Tamagnone, Santiago Capdevila Cascante

In this paper, two THz reflectarray surfaces have been designed and fabricated in order to deflect a plane wave with any polarization and with a specific incident angle to three different specific directions each at distinct three frequencies of 0.7, 1.0 a ...

Ieee-Inst Electrical Electronics Engineers Inc2016

Graphene Quantum Capacitors for High Frequency Tunable Analog Applications

Juan Ramon Mosig, Mihai Adrian Ionescu, Clara-Fausta Moldovan, Wolfgang Amadeus Vitale, Pankaj Sharma, Michele Tamagnone

Graphene quantum capacitors (GQC) are demonstrated to be enablers of radio-frequency (RF) functions through voltage-tuning of their capacitance. We show that GQC complements MEMS and MOSFETs in terms of performance for high frequency analog applications an ...

American Chemical Society (ACS)2016

Theory, design and measurement of near-optimal graphene reconfigurable and non-reciprocal devices at terahertz frequencies

Michele Tamagnone

This thesis explores the applications of graphene for terahertz and far infrared optical components and antennas, with particular emphasis on tunable and non-reciprocal devices. Both terahertz technologies and graphene are emerging fields which hold many p ...

EPFL2016

Theoretical Limits on the Efficiency of Reconfigurable and Nonreciprocal Graphene Antennas

Juan Ramon Mosig, Michele Tamagnone

Theoretical upper limits on the radiation efficiency of reconfigurable antennas based on graphene are presented in closed form and discussed. The theory provides useful information for the design of these structures independently of the type and geometry o ...

Ieee-Inst Electrical Electronics Engineers Inc2016

Near optimal graphene terahertz non-reciprocal isolator

Juan Ramon Mosig, Julien Perruisseau-Carrier, Mihai Adrian Ionescu, Clara-Fausta Moldovan, Michele Tamagnone

Isolators, or optical diodes, are devices enabling unidirectional light propagation by using non-reciprocal optical materials, namely materials able to break Lorentz reciprocity. The realization of isolators at terahertz frequencies is a very important ope ...

Nature Publishing Group2016

Field-enhanced design of steep-slope VO2 switches for low actuation voltage

Juan Ramon Mosig, Mihai Adrian Ionescu, Clara-Fausta Moldovan, Wolfgang Amadeus Vitale, Emanuele Andrea Casu, Michele Tamagnone, Luca Petit

The abrupt metal-insulator transition in vanadium dioxide (VO2) offers novel performance and functionality for beyond CMOS switches, enabling simultaneous high ON current and ultra-steep subthreshold slope with low temperature dependence. We developed a fi ...

IEEE2016

Graphene quantum capacitors for high-Q tunable LC-tanks for RF ICs

Juan Ramon Mosig, Mihai Adrian Ionescu, Clara-Fausta Moldovan, Wolfgang Amadeus Vitale, Michele Tamagnone

We propose and characterize graphene quantum capacitors, tunable with voltage by the control of their charge density, for tunable LC tanks as essential building blocks for Radio-Frequency (RF) functions in densely integrated circuits. We fabricate and inve ...

IEEE2016

Dynamic reconfiguration of plasmonic reflectarrays using graphene: a review of the research led by Prof. Perruisseau-Carrier

Juan Ramon Mosig, Michele Tamagnone

2015

Graphene RF NEMS shunt switches for analog and digital phase shifters

Mihai Adrian Ionescu, Clara-Fausta Moldovan, Wolfgang Amadeus Vitale, Michele Tamagnone

2015

Spatial Variability in Large Area Single and Few-layer CVD Graphene

Mihai Adrian Ionescu, Clara-Fausta Moldovan, Wolfgang Amadeus Vitale, Michele Tamagnone

2015

Design, Fabrication and Characterization of Terahertz Reflectarrays Based on a Silicon Substrate

Juan Ramon Mosig, Anja Skrivervik, Mihai Adrian Ionescu, Clara-Fausta Moldovan, Hamed Hasani, Michele Tamagnone, Santiago Capdevila Cascante

2015

The Orbital Angular Momentum (OAM) Multiplexing Controversy: OAM as a subset of MIMO

Juan Ramon Mosig, Julien Perruisseau-Carrier, Michele Tamagnone, Joana Rita Alves dos Santos Silva, Santiago Capdevila Cascante

Recently the orbital angular momentum (OAM) multiplexing scheme has been proposed to increase supposedly without limit the channel capacity between a transmitter and a receiver nodes communicating in line of sight. A controversy arose about the far-field e ...

2015

Performance evaluation of novel technologies for terahertz reflectarrays

Juan Ramon Mosig, Anja Skrivervik, Julien Perruisseau-Carrier, Mihai Adrian Ionescu, Clara-Fausta Moldovan, Wolfgang Amadeus Vitale, Hamed Hasani, Michele Tamagnone, Pietro Romano, Santiago Capdevila Cascante

2015

Evaluation of graphene for terahertz reflectarray antennas

Juan Ramon Mosig, Anja Skrivervik, Mihai Adrian Ionescu, Clara-Fausta Moldovan, Hamed Hasani, Michele Tamagnone, Santiago Capdevila Cascante

2015

Theoretical Limits of Graphene Terahertz Non-Reciprocal Devices

Juan Ramon Mosig, Julien Perruisseau-Carrier, Michele Tamagnone

2015

Stretchable and Transparent THz Reflectarrays Based on PDMS

Juan Ramon Mosig, Samuel Rosset, Herbert Shea, Michele Tamagnone, Pietro Romano, Santiago Capdevila Cascante

2015

Nonlocal electromagnetic response of graphene nanostructures

Julien Perruisseau-Carrier, Michele Tamagnone

Nonlocal electromagnetic effects of graphene arise from its naturally dispersive dielectric response. We present semianalytical solutions of nonlocal Maxwell's equations for graphene nanoribbon arrays with features around 100 nm, where we found prominent d ...

Amer Physical Soc2015