Y. Kuo, Strong quantum-confined Stark effect in germanium quantum-well structures on silicon, Nature, vol.437, issue.7063, p.1334, 2005.
DOI : 10.1038/nature04204

J. Frigerio, Electro-refractive effect in Ge/SiGe multiple quantum wells, Applied Physics Letters, vol.102, issue.6, p.61102, 2013.
DOI : 10.1063/1.4792271