Optical study of electron and acoustic phonon confinement in ultrathin-body germanium-on-insulator nanolayers
Résumé
Ge-on-insulator (GeOI) acoustic phonon frequencies and E 1 electron band gap vs. GeOI thickness ( T ) show agreement with confinement theories at T > 5 nm and disagree at T < 5 nm. Al 2 O 3 coating improves agreement at T < 5 nm due to interface disorder reduction.