Towards ultra high density multi-layer disk recording by two-photon absorption

Yi Zhang, Alexandr Dvornikov, Yoshi Taketomi, Edwin P. Walker, Peter Rentzepis, Sadik Esener

Research output: Contribution to journalConference article

12 Scopus citations


The feasibility of ultra high density multi-layer disk recording by two-photon absorption was analyzed. A photochromic doped polymeric Write Once Read Many (WORM) disk media was used for two-photon recording. A high power short pulse laser beam was tightly focused for recording. The recording occurred only within a small volume around the focus of the laser beam due to two-photon absorption, and hence allowed high density recording. The recording response of the material followed the square of the optical system point spread function (PSF) resulting in a recorded bit size that was 30% less than the Rayleigh criterion PSF.

Original languageEnglish (US)
Pages (from-to)1-9
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Aug 16 2004
EventAdvanced Optical and Quantum Memories and Computing - San Jose, CA, United States
Duration: Jan 27 2004Jan 28 2004


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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