Near-Field Radiation from a Ridge Waveguide Transducer in the Vicinity of a Solid Immersion Lens

Details Near-Field Radiation from a Ridge Waveguide Transducer in the Vicinity of a Solid Immersion Lens Near-Field Radiation from a Ridge Waveguide Transducer in the Vicinity of a Solid Immersion Lens

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrvl..94d3901s&link_type=abstract

Physical Review Letters, vol. 94, Issue 4, id. 043901

Physics

19

Optical Waveguides And Couplers

Scientific paper

A near-field optical system is investigated to improve the transmission efficiency of near-field transducers. A ridge waveguide is placed adjacent to a solid immersion lens (SIL) but separated by a low-index dielectric layer. The incident electric field near the focus of the SIL is determined by the Richards-Wolf vector field equations. The finite element method is used to solve Maxwell's equations. A spot size of 31nm is obtained. The maximum value of the absorbed optical power density in the recording medium is 7.51×10-4 mW/nm3 for a 100mW input power.

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