Strong quantum-confined Stark effect from light hole excitonic transition in Ge quantum wells for ultra-compact optical modulator

摘要

New possibilities of light modulation in Ge/SiGe quantum wells are experimentally explored using asymmetric polarization dispersion of light-hole excitonic transitions. QCSE from electron-light-hole transition can significantly reduce footprint, energy dissipation over the previously-studied electron-heavy-hole transition.