Abstract

A type of optical observation for the study of very thin metal films is reported. The shape or intensity distribution of reflected interference fringes from an interferometer which involves the thin film as its front or incident surface is observed to undergo a cyclic change as the metal film increases in mass per unit area. The effect is studied throughout the visible spectrum for the metals Ag, Au, Al, Cu, and Cr, evaporated in such a manner as to form films of gradually increasing mass per unit area up to an equivalent thickness of 400 angstroms. The effect is sensitive to the rate of formation of the films, to effects of increased temperature of the substrate, and correlates with recent electron microscope observations on the stable form of thin films of these metals. Brief mention is made of the practical applications of the several types of reflection fringe intensity distributions which are possible, to current investigations of the mechanisms of slip and twinning in metal crystals.

© 1951 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Enhancing the spectral reflectance of refractory metals by multilayer optical thin-film coatings

Muhammed Ali Keçebaş and Kürşat Şendur
J. Opt. Soc. Am. B 35(8) 1845-1853 (2018)

Interference Fringes with Cylindrically Curved Thin Films

N. Barakat
J. Opt. Soc. Am. 48(2) 92-94 (1958)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription