Information media and method and apparatus for writing and reproducing information using the same

摘要

Provided are a method and an apparatus for reproducing information using a semiconductor probe. The apparatus comprises a storage media including a ferroelectric recording layer in which information is stored by arranging the polarization direction of polarization domains of the ferroelectric recording layer and a physical recording layer which is formed on the ferroelectric recording layer and on which information is written by forming pits in the physical recoding layer, a semiconductor probe generating a composite signal including an electric field signal generated by an electric field variation of the ferroelectric recording layer of the storage media and a thermal signal generated by a temperature variation generated due to a variation in the shape of the physical recording layer, a signal detector detecting the composite signal from the semiconductor probe, and a demodulator demodulating the composite signal from the signal detector and extracting the electric field signal and the thermal signal from the composite signal. A signal generated by a field variation and a signal generated by a thermal variation are separated from each other by modulation and an effective information signal is detected such that a signal-to-noise ratio (SNR) is improved and the information signal can be stably reproduced even with the presence of a thermal noise.