OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 64, Iss. 6 — Jun. 1, 1974
  • pp: 839–845

Ultraviolet optical properties of Li

T. A. Callcott and E. T. Arakawa  »View Author Affiliations

JOSA, Vol. 64, Issue 6, pp. 839-845 (1974)

View Full Text Article

Acrobat PDF (715 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



The reflectances of evaporated films of Li were measured as functions of angle of incidence for photon energies between 3 and 10.7 eV, and were analyzed, by use of Fresnel’s equations, to determine the optical constants <i>n</i> and <i>k</i> for each energy. Above 6 eV, measurements with photons incident on both vacuum and substrate surfaces gave the same values of <i>n</i> and <i>k</i> within experimental limits of about ±5%. Below 6 eV, values of <i>n</i> and <i>k</i> obtained from the analysis were not reproducible; they depend in a complex way on film thickness, light polarization, and surface structure. Failure of the analysis below 6 eV is attributed to surface-roughness effects on the <i>R</i> (θ) curves, which are not accounted for in Fresnel’s equations. These effects are believed to be small above 6 eV. The dielectric function ε<sub>1</sub>, and ε<sub>2</sub> and the energy-loss function Im(-1/ε) were determined from <i>n</i> and <i>k</i> for photon energies above 6 eV. The plasma energy of Li, as determined from the condition ε<sub>1</sub> (ω)=0, is 6.7 eV; and the plasma loss peak in Im(-1/ε) is centered at 7.1 eV. In contrast to results for the heavy alkali metals K, Rb, and Cs, no evidence was found for an optical-absorption peak in ε<sub>2</sub> in the spectral region above the plasma frequency.

T. A. Callcott and E. T. Arakawa, "Ultraviolet optical properties of Li," J. Opt. Soc. Am. 64, 839-845 (1974)

Sort:  Author  |  Journal  |  Reset


  1. J. C. Sutherland and E. T. Arakawa, J. Opt. Soc. Am. 57, 645 (1967); J. Opt. Soc. Am. 53, 1080 (1968); J. C. Sutherland, R. N. Hamm, and E. T. Arakawa, J. Opt. Soc. Am. 59, 1581 (1969).R. N. Hamm, and E. T. Arakawa, J. Opt. Soc. Am. 59,1581 (1969).
  2. U. S. Whang, E. T. Arakawa, and T. A. Callcott, Phys. Rev. B 6, 2109 (1972).
  3. U. S. Whang, E. T. Arakawa and T. A. Callcott, Phys. Rev. B 5, 2118 (1972).
  4. U. S. Whang, E. T. Arakawa, and T. A. Callcott, Phys. Rev. Lett. 25, 646 (1970); J. Opt. Soc. Am. 61, 740 (1971).
  5. Monique Rasigni and Georges Rasigni, J. Opt. Soc. Am. 62, 1033 (1972); J. Opt. Soc. Am. 63, 775 (1973).
  6. W. Y. Ching and J. Calloway, Phys. Rev. Lett. 30, 441 (1973).
  7. R. N. Hamm, R. A. MacRae, and E. T. Arakawa, J. Opt. Soc. Am. 55, 1460 (1965).
  8. W. R. Hunter, J. Opt. Soc. Am. 54, 15 (1964); J. Opt. Soc. Am. 55, 1197 (1965).
  9. A. Otto, Z. Phys. 216, 398 (1968); Phys. Stat. Sol. 42, K37 (1970); also see E. Kretschmann. Z. Phys. 241, 313 (1971).
  10. U S. Whang, E. T. Arakawa, R. N. Hamm, and M. W. Williams, J. Opt. Soc. Am. 63, 305 (1973).
  11. J. Crowell and R. H. Ritchie, J. Opt. Soc. Am. 6, 794 (1970); also see J. M. Elson and R. H. Ritchie, Phys. Rev. B 4, 4129 (1971).
  12. C. Macek, A. Otto, and W. Steinmann, Phys. Stat. Sol. 51, K59 (1972).
  13. A. J. Braundmeier and E. T. Arakawa, J. Phys. Chem. Solids 35, 517 (1974).
  14. J. Bösenberg, Phys. Lett. 41A, 185 (1972).
  15. J. N. Hodgson, in Optical Properties and Electronic Structure of Metals and Alloys, edited by F. Abelès (North–Holland, Amsterdam, 1966), p. 60.
  16. C. Kunz, Z. Phys. 196, 311 (1966).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited