Abstract

The refractive index and extinction coefficient of single-crystal and for the first reported time amorphous germanium have been measured at the He–Ne wavelength in the temperature range 25–400° C by using the pseudo-Brewster method. The vacuum reflectometer is described, and the correction method for the surface oxide layer is outlined. The results are shown to be consistent with the expected shift of room-temperature spectra with increasing temperature. On this basis it was concluded that the gross features of the high-temperature spectra may be obtained from the room-temperature spectra together with high-temperature measurements at only a few preselected energies.

© 1982 Optical Society of America

Optical nature of interface layers: a comparative study of the Si–SiO₂ interface

G. E. Jellison and F. A. Modine
J. Opt. Soc. Am. 72(9) 1253-1257 (1982)

Surface and bulk absorption in germanium at 10.6 μm

Colin J. Hutchinson, Colin Lewis, James A. Savage, and Andrew Pitt
Appl. Opt. 21(8) 1490-1495 (1982)

Optical constants of bulk and thin-film aluminum at 6328 Å

A. C. Nyce and L. P. Skolnick
J. Opt. Soc. Am. 65(7) 792-796 (1975)

Infrared optical properties of thin H₂O, NH₃, and CO₂ cryofilms

B. E. Wood and J. A. Roux
J. Opt. Soc. Am. 72(6) 720-728 (1982)

Determination of the temperature-dependent optical properties of amorphous silicon films at elevated temperatures

Florian Fuchs, Christian Vedder, Jochen Stollenwerk, and Peter Loosen
Opt. Express 29(25) 41356-41362 (2021)