Abstract
The optical absorption spectra of two series of plastically deformed germanium samples have been investigated, both in the region of the fundamental edge and at longer wavelengths corresponding to the absorption of light by free holes. The measurements were carried out on a Beckman IR-4 spectrometer at 300 and 77 K. The results showed that beyond the fundamental absorption edge the control spectrum had two singularities: (1) a clear structure in the absorption band at 0. 25-0. 6 ev due to transitions of holes to the third valence band separated from the degenerate (k equals 0) light- and heavy-hole bands by the spin-orbit splitting DELTA equals 0. 28 ev; (2) structure-free absorption in the range H D-BAR omega less than 0. 25 ev, due to transitions of holes between the heavy and light bands, and also due to intraband transitions.
Original language | English |
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Pages (from-to) | 601-603 |
Number of pages | 3 |
Journal | Soviet physics. Semiconductors |
Volume | 17 |
Issue number | 5 |
State | Published - 1983 |