Sven Höfling

Electrostatic control enables robust helical edge-channel transport in III-V quantum spin Hall insulators

Quantum spin Hall transport in InAs/GaInSb-based two-dimensional topological insulators can be limited by parasitic bulk and edge contributions. We demonstrate that these limitations are effectively mitigated through electrostatic control in dual-gated InAs/GaInSb/InAs trilayer q...

Waveguide-Integrated Photonic Platform for On-Chip Optical Quantum-Dot Excitation via Electrically Pumped WGM Microlasers

Abstract We report the fabrication and characterization of an integrated quantum photonic device consisting of an electrically driven whispering-gallery-mode micropillar laser evanescently coupled to a ridge waveguide, both incorporating InGaAs quantum dots (QDs). The lasing char...