Abstract

Reflectance measurements with polarized light for a germanium single crystal in the region between 310 and 550 Å (22.5–40 eV) for angles of incidence from 15° to 75° in steps of 7.5° are reported. The synchrotron light from DESY was used. Optical constants n, k, and thus ∊₁, ∊₂, and |Im∊⁻¹| were established by a least-squares fit to the observed reflectances. The difficulties in determination of optical constants when n≃1 and k≪1 are pointed out. The region of the present study includes the M_4,5 absorption edge from 29.5 to 32 eV. The results are discussed in connection with sum rules and the double plasma loss.

© 1968 Optical Society of America

Optical Constants of Polystyrene in the Vacuum Ultraviolet

J. T. Shapiro and R. P. Madden
J. Opt. Soc. Am. 58(6) 771-775 (1968)

Optical Properties of Some Transition Metals*

D. W. Juenker, L. J. LeBlanc, and C. R. Martin
J. Opt. Soc. Am. 58(2) 164-171 (1968)

Optical Constants of Germanium

R. E. LaVilla and H. Mendlowitz
Appl. Opt. 6(1) 61-68 (1967)

Optical Properties of Amorphous Selenium in the Vacuum Ultraviolet

Algird G. Leiga
J. Opt. Soc. Am. 58(11) 1441-1445 (1968)

Absorption Measurements of Copper, Silver, Tin, Gold, and Bismuth in the Far Ultraviolet

R. Haensel, C. Kunz, T. Sasaki, and B. Sonntag
Appl. Opt. 7(2) 301-306 (1968)