1. Si/Ge nanostructures Rep. Prog. Phys;Brunner,2002
2. Phys. Rev. B;Schmidt,2000
3. Ledentsov Quantum dot heterostructures;Bimberg,1999
4. Abstreiter. Intra-valence band photocurrent spectroscopy of self-assembled Ge dots in Si Appl. Phys. Lett;Miesner,2000
5. Growth of undulating Si0.5Ge0.5 layers for photodetectors at λ=1.55 um J. Appl. Phys;Lafontaine,1999