Re-Writable Two-Photon Three Dimensional Optical Memory
Abstract
Using a polymer block, doped with a highly efficient two-photon dye, we have achieved a high density data-storage with gray-scale control in multiple planes as stacked Compact Disks (CDs) at a separation of 10 micron m. The absorption and fluorescence of the dye at the written spot shift to a longer wavelength, permitting an easy fluorescence mode readout with a linear excitation using an inexpensive laser source. The storage capacity in this case is estimated to be 10 to the 12th power bits/cm3. To demonstrate the practical use of this technology, a three dimensional barcode writer/reader system was developed. We were able to write multiple layers of barcodes in a dye doped polymer media using highly localized two-photon process and were able to read the barcodes using a scanning laser beam coupled with confocal detection of single photon fluorescence.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2001
- Accession Number
- ADA387315
Entities
People
- Paras Nath Prasad
Organizations
- State University of New York at Albany