High-density optical data storage with one-photon and two-photon near-field fluorescence microscopy.
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.
Shen
Y
Y
Swiatkiewicz
J
J
Jakubczyk
D
D
Xu
F
F
Prasad
P N
PN
Vaia
R A
RA
Reinhardt
B A
BA