Abstract

A description is given of a comparison method for determining the values of the absorption coefficient <i>k</i> of a metal relative to previously determined values for Ag. In this method transmission interference filters are constructed which have mica as the dielectric and have reflecting layers of Ag and of the metal <i>x</i> being studied. On adjacent areas of a single sheet of mica, pairs of filters are formed, one with a Ag-mica-Ag combination and the other with a Ag-mica-<i>x</i> combination. Components of a filter pair will have identical mica thicknesses. For a given filter pair the wavelengths transmitted by one combination are compared with those transmitted by the other. Values of <i>k</i> are then calculated from the change in phase accompanying the reflection of light at normal incidence at mica-metal interfaces. The method was found to have special advantages in the wavelength region of 0.65µ to 0.95µ for metals with high reflectivities. Results are given for Au, Cu, and Al in the range of 0.45µ to 0.95µ. The new values of <i>k</i> tend to be higher than older values obtained by other methods. A discussion is included concerning the validity of surface measurements for determining the bulk properties of metals.

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  1. L. G. Schulz, J. Opt. Soc. Am. 41, 1047 (1951).
  2. L. G. Schulz and E. J. Scheibner, J. Opt. Soc. Am. 40, 761 (1950).
  3. L. G. Schulz, J. Opt. Soc. Am. 41, 261 (1951).
  4. L. G. Schulz and F. R. Tangherlini, J. Opt. Soc. Am. 44, 362 (1954).
  5. Handbuch der Physik (Verlag Julius Springer, Berlin, 1928), Vol. 20. Chap. 6.
  6. F. Seitz, Modern Theory of Solids (McGraw-Hill Book Company, Inc., New York, 1941), Chap. 17.
  7. A. H. Wilson, Theory of Metals (The University Press, Cambridge, 1936), Chap. 3.
  8. N. F. Mott and H. Jones, The Theory of the Properties of Metals and Alloys (Oxford University Press, New York, 1936), p. 105.
  9. L. N. Hadley and D. M. Dennison, J. Opt. Soc. Am. 38, 492 (1948).
  10. Mica is double refracting; therefore the transmission bands are always in pairs with components about 15A apart. The larger wavelength of each pair was arbitrarily selected for use in these experiments.
  11. E. Einsporn, Physik. Z. 37, 83 (1936).
  12. See reference 1. Figure 2 presents the results in the form of k/λ versus λ but without an explicit statement of the k values.
  13. R. Minor, Ann. Physik 10, 581 (1903).
  14. G. Hass, Optik 1, 2 (1946).
  15. R. Kretzman, Ann. Physik 37, 303 (1940).
  16. W. Meier, Ann. Physik 31, 1017 (1910).
  17. A. Tool, Phys. Rev. 31, 1 (1910).
  18. J. B. Nathanson, J. Opt. Soc. Am. 28, 300 (1938).
  19. H. O'Bryan, J. Opt. Soc. Am. 26, 122 (1936).
  20. K. Försterling and V. Fréedericksz, Ann. Physik 40, 200 (1913).
  21. G. E. H. Reuter and E. H. Sondheimer, Proc. Roy. Soc. (London) A195, 336 (1948).
  22. T. Holstein, Phys. Rev. 88, 1427 (1952).
  23. R. B. Dingle, Physica 19, 311 (1953).
  24. To be given later.

Dennison, D. M.

L. N. Hadley and D. M. Dennison, J. Opt. Soc. Am. 38, 492 (1948).

Dingle, R. B.

R. B. Dingle, Physica 19, 311 (1953).

Einsporn, E.

E. Einsporn, Physik. Z. 37, 83 (1936).

Försterling, K.

K. Försterling and V. Fréedericksz, Ann. Physik 40, 200 (1913).

Fréedericksz, V.

K. Försterling and V. Fréedericksz, Ann. Physik 40, 200 (1913).

Hadley, L. N.

L. N. Hadley and D. M. Dennison, J. Opt. Soc. Am. 38, 492 (1948).

Hass, G.

G. Hass, Optik 1, 2 (1946).

Holstein, T.

T. Holstein, Phys. Rev. 88, 1427 (1952).

Jones, H.

N. F. Mott and H. Jones, The Theory of the Properties of Metals and Alloys (Oxford University Press, New York, 1936), p. 105.

Kretzman, R.

R. Kretzman, Ann. Physik 37, 303 (1940).

Meier, W.

W. Meier, Ann. Physik 31, 1017 (1910).

Minor, R.

R. Minor, Ann. Physik 10, 581 (1903).

Mott, N. F.

N. F. Mott and H. Jones, The Theory of the Properties of Metals and Alloys (Oxford University Press, New York, 1936), p. 105.

Nathanson, J. B.

J. B. Nathanson, J. Opt. Soc. Am. 28, 300 (1938).

O’Bryan, H.

H. O'Bryan, J. Opt. Soc. Am. 26, 122 (1936).

Reuter, G. E. H.

G. E. H. Reuter and E. H. Sondheimer, Proc. Roy. Soc. (London) A195, 336 (1948).

Scheibner, E. J.

L. G. Schulz and E. J. Scheibner, J. Opt. Soc. Am. 40, 761 (1950).

Schulz, L. G.

L. G. Schulz, J. Opt. Soc. Am. 41, 261 (1951).

L. G. Schulz and F. R. Tangherlini, J. Opt. Soc. Am. 44, 362 (1954).

L. G. Schulz, J. Opt. Soc. Am. 41, 1047 (1951).

L. G. Schulz and E. J. Scheibner, J. Opt. Soc. Am. 40, 761 (1950).

Seitz, F.

F. Seitz, Modern Theory of Solids (McGraw-Hill Book Company, Inc., New York, 1941), Chap. 17.

Sondheimer, E. H.

G. E. H. Reuter and E. H. Sondheimer, Proc. Roy. Soc. (London) A195, 336 (1948).

Tangherlini, F. R.

L. G. Schulz and F. R. Tangherlini, J. Opt. Soc. Am. 44, 362 (1954).

Tool, A.

A. Tool, Phys. Rev. 31, 1 (1910).

Wilson, A. H.

A. H. Wilson, Theory of Metals (The University Press, Cambridge, 1936), Chap. 3.

Other (24)

L. G. Schulz, J. Opt. Soc. Am. 41, 1047 (1951).

L. G. Schulz and E. J. Scheibner, J. Opt. Soc. Am. 40, 761 (1950).

L. G. Schulz, J. Opt. Soc. Am. 41, 261 (1951).

L. G. Schulz and F. R. Tangherlini, J. Opt. Soc. Am. 44, 362 (1954).

Handbuch der Physik (Verlag Julius Springer, Berlin, 1928), Vol. 20. Chap. 6.

F. Seitz, Modern Theory of Solids (McGraw-Hill Book Company, Inc., New York, 1941), Chap. 17.

A. H. Wilson, Theory of Metals (The University Press, Cambridge, 1936), Chap. 3.

N. F. Mott and H. Jones, The Theory of the Properties of Metals and Alloys (Oxford University Press, New York, 1936), p. 105.

L. N. Hadley and D. M. Dennison, J. Opt. Soc. Am. 38, 492 (1948).

Mica is double refracting; therefore the transmission bands are always in pairs with components about 15A apart. The larger wavelength of each pair was arbitrarily selected for use in these experiments.

E. Einsporn, Physik. Z. 37, 83 (1936).

See reference 1. Figure 2 presents the results in the form of k/λ versus λ but without an explicit statement of the k values.

R. Minor, Ann. Physik 10, 581 (1903).

G. Hass, Optik 1, 2 (1946).

R. Kretzman, Ann. Physik 37, 303 (1940).

W. Meier, Ann. Physik 31, 1017 (1910).

A. Tool, Phys. Rev. 31, 1 (1910).

J. B. Nathanson, J. Opt. Soc. Am. 28, 300 (1938).

H. O'Bryan, J. Opt. Soc. Am. 26, 122 (1936).

K. Försterling and V. Fréedericksz, Ann. Physik 40, 200 (1913).

G. E. H. Reuter and E. H. Sondheimer, Proc. Roy. Soc. (London) A195, 336 (1948).

T. Holstein, Phys. Rev. 88, 1427 (1952).

R. B. Dingle, Physica 19, 311 (1953).

To be given later.

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