Rigid bubble pit formation and huge signal enhancement in super-resolution near-field structure disk with platinum-oxide layer

Abstract

Huge signal enhancement was observed by a super-resolution near-field structure disk with a platinum-oxide layer. The carrier-to-noise ratio of 200-nm-mark trains reached 46.1 dB, and 42.3 dB was obtained even at 150-nm-mark trains. The sizes of the marks were one-fifth to one-seventh of the laser spot diameter of the readout system. The cross section of the mark trains was also observed by transmission electron microscopy. It was confirmed that 200-nm-size bubble pits were rigidly formed in good separation and ∼20-nm-platinum particles precipitated inside the bubble. The computer-simulation based on the model supported the huge signal enhancement.

Locally formation of Ag nanoparticles in chalcogenide phase change thin films induced by nanosecond laser pulses

“…The reduction of AgO into Ag 2 O and the decomposition of Ag 2 O into Ag and O 2 take place during laser irradiation. Similar effects can be found in PtePtO x and PdePdO x nanocomposites [10,11].…”

Progress of super-resolution near-field structure in near-field optical storage technology

“…In addition, some other experiments reported that Bi could also be used as the mask material [15] and had similar properties with Sb type Super-RENS. [16]. Moreover, the CNRs of the recording marks with lengths of 200 nm had no changes after running through readout processes 30000 times.…”

Investigation on the static recording characteristic of super-resolution near-field structure with antimony mask layer

“…Through this mask layer, the mark far below the diffraction limit can be recorded and read out. The super-RENS technology has progressed from an original Sb mask type to a AgO x mask type and a PtO x bubble type during the past 6 years [1][2][3][4][5][6] and it is seems that only the PtO x bubble type is the most likely to practical applications [6]. However, the study on the mechanism of the original Sb mask type super-RENS is also important and interesting from the scientific research point of view.…”