NEAR-FIELD LIGHT GENERATING ELEMENT, MAGNETIC FIELD GENERATING ELEMENT, LIGHT IRRADIATION DEVICE, RECORDING AND REPRODUCING DEVICE, IRRADIATION CONTROL PROGRAM, COMPUTER READABLE RECORDING MEDIUM WITH THE PROGRAM RECORDED, AND IRRADIATION CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To prevent near-field light assist magnetic recording or near-field light recording from being performed simultaneously at two adjacent places to an information recording medium.

SOLUTION: A first thin film 102 and a second thin film 103 are formed oppositely in the in-plane direction of a substrate across a gap part, and a real part coefficient of permittivity in the side 105 of the vicinity of at least an out-going terminal plane of the first thin film 102 is different from a real part coefficient of permittivity in the side 106 of the vicinity of at least an out-going terminal plane of the second thin film 103.

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