Journal
APPLIED PHYSICS LETTERS
Volume 81, Issue 25, Pages 4697-4699Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1529078
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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 similar to20-nm-platinum particles precipitated inside the bubble. The computer-simulation based on the model supported the huge signal enhancement. (C) 2002 American Institute of Physics.
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