103 citations · 243 across the 7 of their papers we have counts for
7 papers
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…
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…
Disentangling nonradiative recombination processes in Ge micro-crystals on Si substrates
F. Pezzoli, A. Giorgioni, K. Gallacher +9
We address nonradiative recombination pathways by leveraging surface passivation and dislocation management in micron-scale arrays of Ge crystals grown on deeply patterned Si subst…
Spin-dependent direct gap emission in tensile-strained Ge films on Si substrates
E. Vitiello, M. Virgilio, A. Giorgioni +7
The circular polarization of direct gap emission of Ge is studied in optically-excited tensile-strained Ge-on-Si heterostructures as a function of doping and temperature. Owing to…
Germanium crystals on silicon show their light
F. Pezzoli, F. Isa, G. Isella +8
Germanium and silicon-germanium alloys have found entry into Si technology thanks to their compatibility with Si processing and their ability to tailor electronic properties by str…
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…