Download or read book Low-temperature Far-infrared Spectra of Germanium and Silicon written by Peter J. Gielisse and published by . This book was released on 1964 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: New high-resolution low-temperature (7.5K) far-infrared data on intrinsic germanium and silicon are presented. The findings further substantiate the naturally anticipated similarities in band patterns of the vibrational spectra of diamond type crystals. The low temperature spectra of germanium and silicon show clearly resolved splits in their principal absorption bands analogous to the intriguing doublet in the ca. 2000/cm band in diamond. A possible explanation is indicated. The room temperature far-infrared refractive index of both germanium and silicon and the 7.5K refractive index of germanium have been measured by means of interference fringes. (Author).