Data storage in ferroelectrical films by near-field optical probe

We suggest that a near-field optical probe be used to store data in ferroelectric films. The near-field optical probe has a light focusing effect, the focused spot being as small as the subnanometer scale depending on the apex size of the probe. It is not limited by the diffraction principle. The data storage rate increases by at least 20 times. This is near the scale of the smallest ferroelectric domain in the films.