Textured optical storage media

H. G. Craighead, R. E. Howard, R. W. Smith, D. A. Snyder

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


A class of optical storage media is described which consists of thin films, microscopically textured by reactive ion etching. These surfaces have random arrays of decoupled columns or cones with cross-sectional dimensions less than 100 nm. This structure yields a spatially varying, graded refractive index resulting in low specular reflectance for visible wavelengths. Reflective spots ~1 μm in diameter have been produced on the surfaces by local melting with a low power laser beam. This has been demonstrated for highly stable materials such as Si and Ge with threshold energies as low as ~1 nJ. The fabrication, microstructure, writing parameters and encapsulation of the media are discussed.

Original languageEnglish (US)
Pages (from-to)202-205
Number of pages4
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - May 27 1982

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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