1.5-Mbit/s direct readout of line-and-space patterns using a scanning near-field optical microscopy probe slider with air-bearing control
- 14 February 2000
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 76 (7) , 804-806
- https://doi.org/10.1063/1.125590
Abstract
We have demonstrated 1.5-Mbit/s signal readout of a 0.25 μm line-and-space (L&S) pattern on a rotating disk by using a scanning near-field optical microscopy (SNOM) probe slider with air-bearing control. The light transmittance of the probe was greatly increased through direct irradiation of a focused light to a pyramidal probe tip. The bit rate of the signal was enhanced by two orders of magnitude compared to that of existing SNOM systems that use a tapered-fiber probe. The signal contrast, signal-to-noise ratio, and carrier-to-noise ratio for the 0.25 μm L&S pattern were 19%, 17 dB, and 37 dB, respectively. The estimated resolution limit of the probe corresponded to a L&S width of ∼130 nm.Keywords
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