J. Donecker et al., OPTICAL DETERMINATION OF THE COMPOSITION OF BULK SIGE MONOCRYSTALS, Materials science & engineering. B, Solid-state materials for advanced technology, 28(1-3), 1994, pp. 18-20
Derivative optical transmission spectra at the indirect absorption edg
e of SiGe bulk crystals were measured for the determination of composi
tion and homogeneity. The positions of the thresholds of phonon-assist
ed and no-phonon transitions were evaluated. The samples can be unpoli
shed or uneven.