Fig. 7From: RETRACTED ARTICLE: Enhanced Emission of Quantum System in Si-Ge Nanolayer Structure a Sandwich structure of Si-Ge-Si layers quantum system model in simulation. b Energy band structure of Si-Ge-Si layers, in which the valley of conduction band of germanium at L point rises to be higher than the Γ valley of conduction band. c Raman spectra and peak shift measured in the Si-Ge-Si layers quantum structure related to the tensile strain in germanium after annealingBack to article page