TEXTURED SURFACES: OPTICAL STORAGE AND OTHER APPLICATIONS.

Harold G. Craighead, R. E. Howard, J. E. Sweeney, D. M. Tennant

Research output: Contribution to journalConference articlepeer-review

34 Scopus citations

Abstract

Textured surfaces consisting of submicron columns or cones have been formed in a variety of surfaces using reactive ion etching. On metals, insulators, and semiconductors this texturing forms a graded index matching layer which reduces reflection of visible light to as low as 0. 1%. The optical properties can be permanently altered on an approximately 1 mu m size scale by irradiation with a low power laser beam and this has been explored as a new optical storage medium. The light energy transforms the optically absorbing textured surface to a nonabsorbing smooth one by melting. Reflectance changes of greater than a factor of 100 have been demonstrated at approximately 10 mw light power. The textured surfaces have also been used with dielectric materials to create high transparency optical elements. Highly absorbing films of Ge and Si have been studied as optical storage media.

Original languageEnglish (US)
Pages (from-to)316-319
Number of pages4
JournalJournal of vacuum science & technology
Volume20
Issue number3
DOIs
StatePublished - Jan 1 1981
EventProc of the Natl Symp of the Am Vac Soc, Pt 1 - Anaheim, Calif, USA
Duration: Nov 2 1981Nov 6 1981

ASJC Scopus subject areas

  • Engineering(all)

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