OPTICAL PROPERTIES OF GERMANIUM

The set of optical constants of germanium reported by Marton and Toots, from 8 to 25 eV, have been assessed and found to be internally consistent to within ±5%. An extension of the n and k values up to photon energy of 100 eV using Hunter's k values also has been studied. The analysis consisted of an internal consistency check by applying the Kronig-Kramers dispersion relations to the optical constants and an evaluation and study of the optical and electron oscillator-strength distributions. From an application of the general sum rules to the oscillator-strength distribution, the computed effective number of electrons per germanium atom are in general agreement with an extrapolation of Manson and Cooper's calculation. © 1969 The American Institute of Physics.