Publications (8)
Lasing in Group-IV materials
V. Reboud, D. Buca, H. Sigg +6
Silicon photonics in the near-Infra-Red, up to 1.6 um, is already one of key technologies in optical data communications, particularly short-range. It is also being prospected for…
Tailoring mechanically-tunable strain fields in graphene
M. Goldsche, J. Sonntag, T. Khodkov +7
There are a number of theoretical proposals based on strain engineering of graphene and other two-dimensional materials, however purely mechanical control of strain fields in these…
Atomic Order in Non-Equilibrium Silicon-Germanium-Tin Semiconductors
S. Mukherjee, N. Kodali, D. Isheim +5
The precise knowledge of the atomic order in monocrystalline alloys is fundamental to understand and predict their physical properties. With this perspective, we utilized laser-ass…
Fabrication of comb-drive actuators for straining nanostructured suspended graphene
M. Goldsche, G. J. Verbiest, T. Khodkov +4
We report on the fabrication and characterization of an optimized comb-drive actuator design for strain-dependent transport measurements on suspended graphene. We fabricate devices…
Integrated impedance bridge for absolute capacitance measurements at cryogenic temperatures and finite magnetic fields
G. J. Verbiest, H. Janssen, D. Xu +10
We developed an impedance bridge that operates at cryogenic temperatures (down to 60 mK) and in perpendicular magnetic fields up to at least 12 T. This is achieved by mounting a Ga…
Ultra-low threshold cw and pulsed lasing in tensile strained GeSn alloys
A. Elbaz, D. Buca, N. Von den Driesch +15
GeSn alloys are the most promising semiconductors for light emitters entirely based on group IV elements. Alloys containing more than 8 at.% Sn have fundamental direct band-gaps, s…
Tunable coupling of two mechanical resonators by a graphene membrane
G. J. Verbiest, M. Goldsche, J. Sonntag +4
Coupled nanomechanical resonators are interesting for both fundamental studies and practical applications as they offer rich and tunable oscillation dynamics. At present, the mecha…
Tunable mechanical coupling between driven microelectromechanical resonators
G. J. Verbiest, D. Xu, M. Goldsche +5
We present a microelectromechanical system, in which a silicon beam is attached to a comb-drive actuator, that is used to tune the tension in the silicon beam, and thus its resonan…