Alessandro Cianchi

Prof. Dr. Alessandro Cianchi

Physics, University Tor Vergata, Rome, Lazio, Italy
orcid

Research Focus & Metrics

Academic Career Length

28Years (1999-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 June 2007 in Nature Photonics
Verified
Journal Article
Closed access
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WAW. Ackermann
W. Ackermann
GAG. Asova
G. Asova
VAV. Ayvazyan
V. Ayvazyan
AAA. Azima
A. Azima
NBN. Baboi
N. Baboi
KZK. Zapfe
K. Zapfe

25 February 2002 in Physical Review Letters
Verified
Journal Article
Closed access
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VAV. Ayvazyan
V. Ayvazyan
NBN. Baboi
N. Baboi
IBI. Bohnet
I. Bohnet
RBR. Brinkmann
R. Brinkmann
MCM. Castellano
M. Castellano
KZK. Zapfe
K. Zapfe
Experimental results are presented from vacuum-ultraviolet free-electron laser (FEL) operating in the self-amplified spontaneous emission (SASE) mode. The generation of ultrashort radiation pulses became possible due to specific tailoring of the bunch charge distribution. A complete characterization of the linear and nonlinear modes of the SASE FEL operation was performed. At saturation the FEL produces ultrashort pulses (30–100 fs FWHM) with a peak radiation power in the GW level and with full transverse coherence. The wavelength was tuned in the range of 95–105 nm.

16 November 2005 in The European Physical Journal D
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Journal Article
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VAV. Ayvazyan
V. Ayvazyan
NBN. Baboi
N. Baboi
JBJ. Bähr
J. Bähr
VBV. Balandin
V. Balandin
BBB. Beutner
B. Beutner
KZK. Zapfe
K. Zapfe

26 April 2016 in Nature Communications
Verified
Journal Article
Open access
FGFlavio Giorgianni
Flavio Giorgianni
ECEnrica Chiadroni
Enrica Chiadroni
ARAndrea Rovere
Andrea Rovere
MGMariangela Cestelli Guidi
Mariangela Cestelli Guidi
APAndrea Perucchi
Andrea Perucchi
Stefano LupiStefano Lupi
Stefano Lupi
Electrons with a linear energy/momentum dispersion are called massless Dirac electrons and represent the low-energy excitations in exotic materials such as graphene and topological insulators. Dirac electrons are characterized by notable properties such as a high mobility, a tunable density and, in topological insulators, a protection against backscattering through the spin–momentum locking mechanism. All those properties make graphene and topological insulators appealing for plasmonics applications. However, Dirac electrons are expected to present also a strong nonlinear optical behaviour. This should mirror in phenomena such as electromagnetic-induced transparency and harmonic generation. Here we demonstrate that in Bi2Se3 topological insulator, an electromagnetic-induced transparency is achieved under the application of a strong terahertz electric field. This effect, concomitantly determined by harmonic generation and charge-mobility reduction, is exclusively related to the presence of Dirac electron at the surface of Bi2Se3, and opens the road towards tunable terahertz nonlinear optical devices based on topological insulator materials.

15 April 2013 in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Journal Article
Open access
Massimo FerrarioMassimo Ferrario
Massimo Ferrario
DAD. Alesini
D. Alesini
Maria Pia AnaniaMaria Pia Anania
Maria Pia Anania
ABA. Bacci
A. Bacci
MBM. Bellaveglia
M. Bellaveglia
Julietta V. RauJulietta V. Rau
Julietta V. Rau
A new facility named SPARC_LAB has been recently launched at the INFN National Laboratories in Frascati, merging the potentialities of the former projects SPARC and PLASMONX. We describe in this paper the status and the future perspectives at the SPARC_LAB facility.

5 February 2010 in Physical Review Letters
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Journal Article
Closed access
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MFM. Ferrario
M. Ferrario
DAD. Alesini
D. Alesini
ABA. Bacci
A. Bacci
MBM. Bellaveglia
M. Bellaveglia
RBR. Boni
R. Boni
CVC. Vicario
C. Vicario
In this Letter we report the first experiments aimed at the simultaneous demonstration of the emittance compensation process and velocity bunching in a high brightness electron source, the SPARC photoinjector in INFN-LNF. While a maximum compression ratio up to a factor 14 has been observed, in a particular case of interest a compression factor of 3, yielding a slice current of 120 A with less than 2  μm slice emittance, has been measured. This technique may be crucial in achieving high brightness beams in photoinjectors aiming at optimized performance of short wavelength single-pass free electron lasers or other advanced applications in laser-plasma accelerators.