Publications de Alessandro Valentino Matheoud

Optical Feeder Links for GEO Satellites at Viasat Inc

Stefano Vaccaro, Alessandro Valentino Matheoud, Simon Julien Fabbri

This paper provides an overview of the activities on GEO Optical Feeder Links at Viasat Inc. In the last decade, laser communication has emerged as a promising technology for advancing the performance of high-capacity satellites and enhancing the security ...

SPIE2024

A Low Power 35 GHz HEMT Oscillator for Electron Spin Resonance Spectroscopy

Giovanni Boero, Nergiz Sahin Solmaz, Alessandro Valentino Matheoud

This paper presents a low power microwave oscillator designed as sensor for electron spin resonance (ESR) spectroscopy. Low power consumption is necessary for low temperature operation. Additionally, lower power consumption allows for a lower microwave mag ...

IEEE2021

Electron paramagnetic resonance magnetic field sensors for particle accelerators

Giovanni Boero, Alessandro Valentino Matheoud, Anthony Jean Beaumont, Marco Buzio

We report on four electron paramagnetic resonance sensors for dynamic magnetic field measurements at 36 mT, 100 mT, 360 mT, and 710 mT. The sensors are based on grounded co-planar microwave resonators operating at about 1 GHz and 3 GHz, realized using prin ...

2020

Single chip dynamic nuclear polarization microsystem

Giovanni Boero, Marco Grisi, Nergiz Sahin Solmaz, Alessandro Valentino Matheoud, Gabriele Gualco

Integration of the sensitivity-relevant electronics of nuclear magnetic resonance (NMR) and electron spin resonance (ESR) spectrometers on a single chip is a promising approach to improve the limit of detection, especially for samples in the nanoliter and ...

2020

Microwave inductive proximity sensors with sub-pm/Hz1/2 resolution

Giovanni Boero, Nergiz Sahin Solmaz, Alessandro Valentino Matheoud, Lénaïc Frehner

Inductive proximity sensors are low-cost and versatile detectors achieving resolutions in the nm and sub-nm range. Their typical working frequency ranges from tens of kHz to a few MHz. Operation at higher frequencies is considered as a possible route for t ...

2019

Electron Spin Resonance detectors from 400 MHz to 360 GHz

Alessandro Valentino Matheoud

Methods based on the electron spin resonance (ESR) phenomenon are non-invasive tools adopted to investigate paramagnetic systems at temperatures ranging from above 1000 K to below 1 K. Since 2008, the group of Dr. Boero has been working on a detection tech ...

EPFL2019

A Low-Power Microwave HEMT $LC$ Oscillator Operating Down to 1.4 K

Giovanni Boero, Nergiz Sahin Solmaz, Alessandro Valentino Matheoud

High-electron-mobility transistors (HEMTs) based on 2-D electron gases (2DEGs) in III-V heterostructures have superior mobility compared with the transistors of silicon-based complementary metal-oxide-semiconductor technologies. The large mobility makes th ...

Institute of Electrical and Electronics Engineers2019

A single chip electron spin resonance detector based on a single high electron mobility transistor

Giovanni Boero, Nergiz Sahin Solmaz, Alessandro Valentino Matheoud

Single-chip microwave oscillators are promising devices for inductive electron spin resonance spectroscopy (ESR) experiments on nanoliter and subnanoliter samples. Two major problems of the previously reported designs were the large minimum microwave magne ...

Academic Press Inc - Elsevier Science2018

Single-chip electron spin resonance detectors operating at 50 GHz, 92 GHz, and 146 GHz

Jürgen Brugger, Henrik Moodysson Rønnow, Giovanni Boero, Ivica Zivkovic, Alessandro Valentino Matheoud, Jens Anders, Gabriele Gualco

We report on the design and characterization of single-chip electron spin resonance (ESR) detectors operating at 50 GHz, 92 GHz, and 146 GHz. The core of the single-chip ESR detectors is an integrated LC-oscillator, formed by a single turn aluminum planar ...

Academic Press Inc - Elsevier Science2017

High sensitivity field asymmetric ion mobility spectrometer

Jürgen Brugger, Giovanni Boero, Alessandro Valentino Matheoud, Mario Andres Chavarria Varon, Philippe Marmillod

A high sensitivity field asymmetric ion mobility spectrometer (FAIMS) was designed, fabricated, and tested. The main components of the system are a 10.6 eV UV photoionization source, an ion filter driven by a high voltage/high frequency n-MOS inverter circ ...

American Institute of Physics2017