Effects of annealing temperature on shape transformation and optical properties of germanium quantum dots*
Samavati Alirezaa)†, Othaman Z.a), Ghoshal S. K.b), Mustafa M. K.c)
       
Frequency positions of the Ge–Ge optical phonons which are shifted slightly towards higher frequencies with respect to their bulk value. Inset: shows the Ge–Ge optical phonon annealed at 650 °C fitted with theory models.