Two-photon readout of three-dimensional memory in silica
- 28 June 2000
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 77 (1), 13-15
- https://doi.org/10.1063/1.126861
Abstract
We report the readout of three-dimensional (3D) optical memory in silica by detecting the photoluminescence (PL) of the bits (voxels). A broad defect-related PL band at 400–700 nm was excited by two-photon absorption of femtosecond (pulse duration of 120 fs) illumination at 795 nm. We employed a simple reflection-type scanning readout without the use of a confocal detection scheme to read 3D memory by recording the PL of the bits (the same objective lens was used for the excitation and the collection of the PL). Bit plane separation as small as 3 μm was resolved without cross talk, when the theoretical limit of the axial resolution evaluated as a full-width at half maximum measure of a bit size was 1.4 μm at the fabrication conditions employed.Keywords
This publication has 12 references indexed in Scilit:
- Optically induced defects in vitreous silicaApplied Surface Science, 2000
- Oxygen-Related Intrinsic Defects in Glassy: Interstitial Ozone MoleculesPhysical Review Letters, 2000
- Luminescence and defect formation by visible and near-infrared irradiation of vitreous silicaPhysical Review B, 1999
- Transmission and photoluminescence images of three-dimensional memory in vitreous silicaApplied Physics Letters, 1999
- Anomalous Anisotropic Light Scattering in Ge-Doped Silica GlassPhysical Review Letters, 1999
- Three-Dimensional Optical Data Storage in Vitreous SilicaJapanese Journal of Applied Physics, 1998
- Ultrafast-laser driven micro-explosions in transparent materialsApplied Physics Letters, 1997
- Comparison of recording densities in three-dimensional optical storage systems: multilayered bit recording versus angularly multiplexed holographic recordingJournal of the Optical Society of America A, 1996
- Two-Photon Laser Scanning Fluorescence MicroscopyScience, 1990
- Three-Dimensional Optical Storage MemoryScience, 1989