103 citations · 287 across the 9 of their papers we have counts for
10 papers
THz Higher-Order Topological Photonics in Ge-on-Si Heterostructures
Ian Colombo, Pietro Minazzi, Emiliano Bonera +2
We design germanium-based higher-order topological cavities for terahertz applications by breaking the symmetry of a two-dimensional photonic crystal following the Su-Schrieffer-He…
Quantum spin Hall phase in GeSn heterostructures on silicon
B. M. Ferrari, F. Marcantonio, F. Murphy-Armando +2
Quantum phases of solid-state electron systems look poised to sustain exotic phenomena and a very rich spin physics. We propose a practical silicon-based architecture that spontane…
Optical manipulation of the Rashba effect in germanium quantum wells
S. Rossi, E. Talamas Simola, M. Raimondo +6
The Rashba effect in Ge/SiGe multiple quantum wells embedded in a p-i-n diode is studied through polarization and time-resolved photoluminescence. In addition to…
Carrier and Spin Coherent Dynamics in Strained Germanium-Tin Semiconductor on Silicon
Sebastiano De Cesari, Andrea Balocchi, Elisa Vitiello +6
Germanium-Tin is emerging as a material exhibiting excellent photonic properties. Here we demonstrate optical initialization and readout of spins in this intriguing group IV semico…
Optically reconfigurable polarized emission in Germanium
Sebastiano De Cesari, Roberto Bergamaschini, Elisa Vitiello +2
Light polarization can conveniently encode information. Yet, the ability to steer polarized optical fields is notably demanding but crucial to develop practical methods for data en…
Temperature-dependent photoluminescence characteristics of GeSn epitaxial layers
Fabio Pezzoli, Anna Giorgioni, David Patchett +1
GeSn epitaxial heterostructures are emerging as prominent candidates for the monolithic integration of light sources on Si substrates. Here we propose a judicious explanation for t…
Giant g factor tuning of long-lived electron spins in Ge
Anna Giorgioni, Stefano Paleari, Stefano Cecchi +5
Control of electron spin coherence via external fields is fundamental in spintronics. Its implementation demands a host material that accommodates the highly desirable but contrast…
Optical orientation of electron spins and valence band spectroscopy in germanium
Fabio Pezzoli, Andrea Balocchi, Elisa Vitiello +2
We have investigated optical orientation in the vicinity of the direct gap of bulk germanium. The electron spin polarization is studied via polarization-resolved photoluminescence…
Spin and energy relaxation in germanium studied by spin-polarized direct-gap photoluminescence
F. Pezzoli, L. Qing, A. Giorgioni +4
Spin orientation of photoexcited carriers and their energy relaxation is investigated in bulk Ge by studying spin-polarized recombination across the direct band gap. The control ov…
Optical spin injection and spin lifetime in Ge heterostructures
F. Pezzoli, F. Bottegoni, D. Trivedi +9
We demonstrate optical orientation in Ge/SiGe quantum wells and study their spin properties. The ultrafast electron transfer from the center of the Brillouin zone to its edge allow…