Photosensitive polymeric materials for two-photon 3D WORM optical data storage systems

Ciceron O. Yanez, Carolina D. Andrade, Sheng Yao, Gheorghe Luchita, Mykhailo V. Bondar, Kevin D. Belfield

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


We report the photochemistry and development of a fluorescence readout-based, nonlinear absorption, three-dimensional optical data storage system. In this system, writing was achieved by acid generation upon two-photon absorption (2PA) of a photoacid generator (PAG; at 710 or 730 nm). Readout was then performed by interrogating two-photon-absorbing dyes, after protonation, at 860 nm. Linear and nonlinear photophysical characterization of 2PA PAGs and acid-sensitive fluorescent dyes demonstrates good spectral resolution between the PAG and protonated 2PA dye and relatively high two-photon absorptivity. Solution spectroscopic studies confirm photoacid generation and dye protonation. Two-photon recording and readout of voxels were demonstrated in five and eight consecutive, crosstalk-free layers within a polymer matrix, generating a data storage capacity of up to 1.8 × 10 13 bits/cm 3.

Original languageEnglish (US)
Pages (from-to)2219-2229
Number of pages11
JournalACS Applied Materials and Interfaces
Issue number10
StatePublished - Oct 28 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science


  • PAGs
  • fluorescence
  • optical data storage
  • photoacid generators
  • two photon
  • two-photon absorption


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