Superresolution (SR) phenomena due to Ge2Sb2Te 5 films were examined by combined analysis of the transmission electron microscopy (TEM) microstructures of the laser-irradiated films and the results from dynamic and static tests using blue lasers. A new finding was made that comprises a complementary case of the classical SR readout by Ge 2Sb2Te5 film; an amorphous band instead of a closed aperture of melt in the crystalline background forms behind a moving laser but still produces a high SR signal. A complete carrier-to-noise-ratio curve of a SR-read-only memory employing Ge2Sb2Te 5 may be derived from a nonlinear optical effect, specifically thermally assisted saturable absorption.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)