High-density optical data storage with one-photon and two-photon near-field fluorescence microscopy.
2001
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.
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