Of Near-Field Transducers

In this section the results of the previous two sections are combined to compare several NFT designs that have been suggested for use in data storage. In particular, the triangle antenna and the bow-tie antenna are compared with the circular aperture, the tapered rectangular aperture, the bow-tie aperture, and the C aperture. All NFTs are illuminated by a highly focused beam using a SIL with a refractive index of 1.5 to obtain an optical spot size with dimensions 

DS1-10 Peak Field Intensity in Gap 650 nm. DS1b-10b Peak Field Intensity in Gap 525 nm 

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Summary of near-field transducer NFT) performance. The peak E intensity is normalized by that of the incident beam. 

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