About this Physics and Astronomy article
Optical Constants of the Noble Metals by P. B. Johnson; R. W. Christy is a Physics and Astronomy article available to read on EtoBox.
The optical constants n and k were obtained for the noble metals (copper, silver, and gold) from reflection and transmission measurements on vacuum-evaporated thin films at room temperature, in the spectral range 0. 5 -6. 5 eV. The film-thickness range was 185-500 L. Three optical measurements were inverted to obtain the film thickness d as well as g and k. 0 The estimated error in d was +2 A, and that in yg, k was less than 0. 02 over most of the spec- tral range. The results in the film-thickness range 250-500 A were independent of thickness, and were unchanged after vacuum annealing or aging in air. The free-electron optical effec- tive masses and relaxation times derived from the results in the near infrared agree satisfactorily with previous values. The interband contribution to the imaginary part of the dielectric constant was obtained by subtracting the free-electron contribution. Some recent theoret- ical calculations are compared with the results for copper and gold. In addition, some other recent experiments are critically compared with our results.
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- Author
- P. B. Johnson; R. W. Christy
- Publisher
- American Physical Society (APS)
- Published
- 1972
- Language
- EN
- Field
- Physics and Astronomy (Physical Sciences)