High-density optical data storage with one-photon and two-photon near-field fluorescence microscopy
- 20 February 2001
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 40 (6), 938-940
- https://doi.org/10.1364/ao.40.000938
Abstract
A spatially localized photochemical reaction induced by near-field femtosecond laser pulses is demonstrated on a nanometer scale and used for high-density optical data storage. Recorded domains down to 120 and 70 nm are obtained with one-photon and two-photon excitation, respectively. It is shown that the local-field confinement that is due to the quadratic dependence of two-photon excitation on light intensity has the potential to increase the near-field optical storage density.Keywords
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