Publications (22)
On the survival of Floquet-Bloch states in the presence of scattering
S. Aeschlimann, S. A. Sato, R. Krause +9
Floquet theory has spawned many exciting possibilities for electronic structure control with light with enormous potential for future applications. The experimental realization in…
Waveguide-integrated, plasmonic enhanced graphene photodetectors
J. E. Muench, A. Ruocco, M. A. Giambra +13
We present a micrometer scale, on-chip integrated, plasmonic enhanced graphene photodetector (GPD) for telecom wavelengths operating at zero dark current. The GPD is designed and o…
Early stage of CVD graphene synthesis on Ge(001) substrate
L. Di Gaspare, A. M. Scaparro, M. Fanfoni +6
In this work we shed light on the early stage of the chemical vapor deposition of graphene on Ge(001) surfaces. By a combined use of microRaman and x-ray photoelectron spectroscopi…
STM Study of Exfoliated Few Layer Black Phosphorus Annealed in Ultrahigh Vacuum
Abhishek Kumar, F. Telesio, S. Forti +7
Black Phosphorus (bP) has emerged as an interesting addition to the category of two-dimensional materials. Surface-science studies on this material are of great interest, but they…
Increasing the active surface of titanium islands on graphene by nitrogen sputtering
T. Mashoff, D. Convertino, V. Miseikis +5
Titanium-island formation on graphene as a function of defect density is investigated. When depositing titanium on pristine graphene, titanium atoms cluster and form islands with a…
Driving with temperature the synthesis of graphene films on Ge(110)
L. Persichetti, M. De Seta, A. M. Scaparro +8
We systematically investigate the chemical vapor deposition growth of graphene on Ge(110) as a function of the deposition temperature close to the Ge melting point. By merging spec…
Quasi-free Standing Epitaxial Graphene on SiC by Hydrogen Intercalation
C. Riedl, C. Coletti, T. Iwasaki +2
Quasi-free standing epitaxial graphene is obtained on SiC(0001) by hydrogen intercalation. The hydrogen moves between the 6root3 reconstructed initial carbon layer and the SiC subs…
THz detection with epitaxial graphene field effect transistors on silicon carbide
F. Bianco, D. Perenzoni, D. Convertino +6
We report on room temperature THz detection by means of antenna-coupled field effect transistors fabricated by using epitaxial graphene grown on silicon carbide substrate. Two inde…
Thermal decomposition and chemical vapor deposition: a comparative study of multi-layer growth of graphene on SiC(000-1)
D. Convertino, A. Rossi, V. Miseikis +2
This work presents a comparison of the structural, chemical and electronic properties of multi-layer graphene grown on SiC(000-1) by using two different growth approaches: thermal…
Microscopic understanding of ultrafast charge transfer in van-der-Waals heterostructures
R. Krause, S. Aeschlimann, M. Chavez-Cervantes +7
Van-der-Waals heterostructures show many intriguing phenomena including ultrafast charge separation following strong excitonic absorption in the visible spectral range. However, de…
Ultrafast Momentum Imaging of Pseudospin-Flip Excitations in Graphene
S. Aeschlimann, R. Krause, M. Chávez-Cervantes +5
The pseudospin of Dirac electrons in graphene manifests itself in a peculiar momentum anisotropy for photo-excited electron-hole pairs. These interband excitations are in fact forb…
Abrupt changes in the graphene on Ge(001) system at the onset of surface melting
L. Persichetti, L. Di Gaspare, F. Fabbri +7
By combining scanning probe microscopy with Raman and x-ray photoelectron spectroscopies, we investigate the evolution of CVD-grown graphene/Ge(001) as a function of the deposition…
Linear conduction in N-type organic field effect transistors with nanometric channel lengths and graphene as electrodes
F. Chianese, A. Candini, M. Affronte +3
In this work we test graphene electrodes in nano-metric channel n-type Organic Field EffectTransistors (OFETs) based on thermally evaporated thin films of perylene-3,4,9,10-tetraca…
Photo Thermal Effect Graphene Detector Featuring 105 Gbit s-1 NRZ and 120 Gbit s-1 PAM4 Direct Detection
S. Marconi, M. A. Giambra, A. Montanaro +9
The challenge of next generation datacom and telecom communication is to increase the available bandwidth while reducing the size, cost and power consumption of photonic integrated…
Ripple morphology of graphitic surfaces: a comparison between few-layer graphene and HOPG
N. Haghighian, D. Convertino, V. Miseikis +5
The surface structure of Few-Layer Graphene (FLG) epitaxially grown on the C-face of SiC has been investigated by TM-AFM in ambient air and upon interaction with diluted aqueous so…
Going beyond copper: wafer-scale synthesis of graphene on sapphire
N. Mishra, S. Forti, F. Fabbri +13
The adoption of graphene in electronics, optoelectronics and photonics is hindered by the difficulty in obtaining high quality material on technologically-relevant substrates, over…
Enhanced electron-phonon coupling in graphene with periodically distorted lattice
E. Pomarico, M. Mitrano, H. Bromberger +11
Electron-phonon coupling directly determines the stability of cooperative order in solids, including superconductivity, charge and spin density waves. Therefore, the ability to enh…
Transport in strongly-coupled graphene-LaAlO3/SrTiO3 hybrid systems
I. Aliaj, I. Torre, V. Miseikis +9
We report on the transport properties of hybrid devices obtained by depositing graphene on a LaAlO3/SrTiO3 oxide junction hosting a 4 nm-deep two-dimensional electron system. At lo…
Graphene promotes axon elongation through local stall of Nerve Growth Factor signaling endosomes
D. Convertino, F. FabbrI, N. Mishra +8
Several works reported increased differentiation of neuronal cells grown on graphene; however, the molecular mechanism driving axon elongation on this material has remained elusive…
Direct evidence for efficient ultrafast charge separation in epitaxial WS/graphene heterostructure
S. Aeschlimann, A. Rossi, M. Chávez-Cervantes +8
We use time- and angle-resolved photoemission spectroscopy (tr-ARPES) to investigate ultrafast charge transfer in an epitaxial heterostructure made of monolayer WS and graphene…
Investigating the CVD synthesis of graphene on Ge(100): towards layer by layer growth
A. M. Scaparro, V. Miseikis, C. Coletti +4
Germanium is emerging as the substrate of choice for the growth of graphene in CMOS-compatible processes. For future application in next generation devices the accurate control ove…
The ultrafast dynamics and conductivity of photoexcited graphene at different Fermi energies
A. Tomadin, S. M. Hornett, H. I. Wang +10
For many of the envisioned optoelectronic applications of graphene it is crucial to understand the sub-picosecond carrier dynamics immediately following photoexcitation, as well as…