Phd in ACCELERATOR PHYSICS

email: stefano.lupi@uniroma1.it
phone: 0649913473
building: FERMI
room: 301

STEFANO LUPI

Date of Birth
02/12/1963

Academic Appointments
2013-2019 National Scientific Qualification to Full Professor in Experimental Physics of Matter, 02/B1
2005-now Permanent Associate Professor , Department of Physics, Sapienza University of Rome;
1996-2005 Permanent Researcher , Department of Physics, Sapienza University of Rome;

Education
1993-1996, Post-Doc fellowship in the EU research program "Human Capital and Mobility, LURE laboratory of the University of Paris-sud, France;
1990-1992, PhD in Physics, Sapienza University of Rome;
March 1989, Laurea in Physics, Sapienza University of Rome;

Other Appointments
2015-2018, Joint Associate Professor, MEPHI University Moscow;
2016, Visiting Professor, Department of Physics, University Statale Milano;
June 2010- October 2010, Visiting Professor, Max Planck CFEL Laboratory, Hamburg University, Germany;
November 2009- March 2010, Visiting Professor, Elettra Sincrotrone Trieste;
October 2001- March 2002, Visiting Professor, University of Paris-sud, Paris, France;

Scientific Responsabilities
1) Responsible of the TERALAB laboratory (Frequency and Time Domain Terahertz Spectroscopy) at the Department of Physics, Sapienza University of Rome, Italy;
2) Responsible of the “Material Science” branch line (CNR/Sapienza) of the SISSI infrared and terahertz beamline at the Elettra Synchrotron, Trieste, Italy;
3) Co-Responsible of the FEMTOTERA terahertz bemline at the SPARC_LAB LNF-INFN, Frascati, Italy;
4) Co-Responsible of the TERAFERMI terahertz beamline at FERMI@Elettra free electron laser, Trieste, Italy;

National and international grants
2018-2020, TERA, Terahertz-ERA, A High intensity terahertz source for particle acceleration.
Call INFN, 850 k€;

2018-2019, Photoacoustic from terahertz to ultraviolet with 3D Graphene
Graphene Flagship Core2, 120 k€;

2017-2019, Linear, non-linear, and time-resolved Terahertz spectroscopy using the latest radiation sources.
MAE (Italian Foreign Minister) Executive Program of cooperation in the field of science and technology, Italy-Japan, 90 k€;

2017-2018, Terahertz Research and Developments: Biomedicine Imaging with Terahertz Radiation;
INFN, 100 k€;

2013-2016, Infrared and terahertz Spectroscopy at the SISSI and TERAFERMI facilities;
EUROFEL-CNR Activities, 150 k€;

2013-2015, Terahertz Pump-Probe Spectroscopy: FEMTOTERA;
INFN, 150 k€;

2011-2013, Terahertz Ultrashort Electron Beam Diagnostic: TERASPARC;
INFN, 150 k€;

2012, Fundamental properties and Applications of 2-Dimensional Dirac Electron Gases in Topological Insulators;
Sapienza Funding Research, 50 k€;

2009, Pump-Probe Terahertz Spectroscopy;
Sapienza Funding Research, 10 k€;

2007, Infrared Spectroscopy on materials of physical, geological, and chemical interest at high-pressure;
Sapienza Funding Research, 60 k€;

2005, Metal-Insulator Transition in Cuprates;
Sapienza Funding Research, 20 k€;

2004, Developments of an Infrared Synchrotron Beamline at the Elettra Synchrotron, Trieste, Italy
Elettra Sincrotrone/CNR, 1 M€;

Total funding as PI 2,550 M€

Pubblications
https://orcid.org/0000-0001-7002-337X
Author ID:26643498200 Scopus
245 papers on SCOPUS including
1 Nature,
1 Nature Nanotechnology,
2 Nature Physics,
4 Nature Communications,
2 Nano Letters,
3 Nature Scientific Report,
18 Phys. Rev. Lett.,
4 Book Chapter,

Talks
2 Plenary
48 Invited
14 Contributed

Total number of citations Scopus: 3170
H-index Scopus: 32
Total number of citations WOS: 3082
H-index WOS: 32
Total number of citations Google Scholar: 4196
H-index Google Scholar: 36

Student Tutoring
7 Post-doc
12 PhD Students
21 Graduate Students
17 Undergraduate Students

Department and Sapienza Responsabilities
1) Member of the PhD final-examination committee in Scienze della Terra, curriculum “Cultural Heritage”, Sapienza University (2017);
2) Member of Doctoral Commitee “Modelli Matematici per l'Ingegneria, Elettromagnetismo e Nanoscienze” (2010-now);
3) Responsible of the Didactic Laboratory of the Department of Physics B. Pontecorvo (2006-2011);
4) Member Department Committee “Borse Perfezionamento Estero” (2012-2015);
5) Member Department Committee “Studio-Lavoro” (2010-2018);

Research Activities
The research activity has been focalized on the exotic low-energy excitations in condensed matter physics ranging from Dirac electrons in Topological Insulators and graphene, High-Tc superconductors, strongly correlated electronic systems, plasmonics, metamaterials, and Biophysics. Specific electromagnetic sources in the Terahertz (THz) and Infrared (IR) spectral range, have been built for investigating the optical properties of these system and, in the most of cases, those sources have been also open to external users.

1. The low-energy electrodynamics of exotic electronic materials based on Dirac and Weyl electrons and their applications for non-linear terahertz optics, plasmonics, terahertz detectors and photoacoustic.
Most of materials in condensed matter physics are characterized by low-energy electronic excitations showing a quadratic energy/momentum dispersion (Schrodinger electrons). Only recently, electrons with a linear energy/momentum (relativistic) dispersion (massless Dirac carriers), have been discovered first in graphene, and after in Topological Insulators and Weyl systems, and their potentialities in the fields of plasmonics and photonics have been readily recognized, leading to different applications in active and tunable optical devices. Our recent research concerns the applications of Dirac electronic systems in terahertz optics in which we discovered a saturable absorption effect and tunable plasmon excitations in Topological Insulators. Another research regards the plasmonic absorption in three-dimensional nanoporous graphene. A patent has been finally submitted on the use of the three-dimensional graphene for photoacoustic and terahertz detector applications [European Patent Nr. 16 189 004.1].
2. The optical, infrared and terahertz properties using conventional and synchrotron radiation of strongly correlated electronic materials as High-Tc superconductors (HCTS), transitional metal oxides (TMO) and 2D dimensional electron gases (2DEG);
Strongly correlated electronic materials (HCTS, TMO and 2DEG) are characterized by a strong interplay of lattice, orbital, charge and spin degrees of freedom. Their similar energy scales determine competing ground states spanning from superconductivity, charge-ordering insulators, bad-metals etc, etc. A transformation among those states can be obtained by changing external parameters like temperature, pressure and doping and this often corresponds to a Metal-to-Insulator Transition (MIT) which can be traced by spectroscopic measurements from THz to UV.
3. Plasmonics.
A major role in metal optics is played by plasmonic materials. These systems can be fabricated by electron lithography and show several properties like super-transmittance, localization of electromagnetic field on sub-wavelength spatial scales, strong dependence of optical response to a small variation of physical properties at interfaces. We built-up a mid-IR plasmonic sensor which is sensitive to femtomoles of organic molecules. We also investigated THz plasmonic materials in order to probe the collective modes of macromolecules. We also studied the THz plasmonic response of metamaterials based on unconventional metals like HCTS and Topological Insulators.
4. Development of new sources for infrared and terahertz spectroscopy.
Most of the low-energy excitations in exotic materials fall in the Terahertz and Infrared range. Their spectroscopic investigation in frequency and time domain asks for new radiation sources providing high-brilliance, a high temporal and spatial stability and a sub-ps time resolution. The SISSI beamline at ELETTRA is one of the most performant infrared beamline in Europe. SISSI has been projected, mounted and characterized in the last years by S. Lupi through a collaboration between ELETTRA-Sincrotrone Trieste, INFM/CNR and University of Rome La Sapienza. Recently, high-power, sub-ps pulsed THz radiation has been realized to play a fundamental role in pump-probe and non-linear experiments. Indeed, sub-ps THz pulses can be used to a resonantly pumping of low-energy modes and studying their relaxation towards the equilibrium. On this ground we started the FEMTOTERA project for extracting and using the THz radiation at the Free Electron Laser SPARC-INFN in Frascati, Italy. Through this project, within a collaboration between INFN and University of Rome La Sapienza, we produced 100 fs/25 microJoule pulsed THz radiation. A new Terahertz project has been proposed to the Fermi@Elettra free electron laser in 2010. This project that concerns the development of a Terahertz beamline at the Fermi machine has been approved in 2013 and financed through a collaboration among CNR and ELETTRA. The THz beamline TERAFERMI emits THz pulses with a time duration of 50 fs, covering a spectral range up to 10 THz. The energy per pulse reached 100 microJ, which corresponds to a THz electric field of about 10 MV/cm (the atomic electric field). The beamline has been open to external users in January 2017.
5. The infrared and terahertz investigation of materials with biophysical interest;
We have been studied mid-IR spectra of monolayers and bilayers of binary mixing of phosfolipids in order to obtain information on the phase separation phenomena existing in these systems. Moreover, we have investigated the modification of enzyme secondary structure in proteins attached to nanocarriers. Recently, I proposed a project for using THz and Near-IR radiation for biomedical imaging on skin-cancer. This project has been financed by INFN.

Patent
I have a patent (European Patent Nr. 16 189 004.1) on:
Transducer for electromagnetic and thermo-acoustic wave based on three dimensional graphene structure.