Near field light generating device and heat assisted magnetic recording head with the same
First Claim
1. A near field light generating device comprising:
- a light source;
a waveguide core which transmits light emitted from the light source; and
a solid immersion mirror which generates near field light, comprising;
an upper transmission surface through which light from the waveguide core is transmitted into the solid immersion mirror;
a lower reflection surface, opposite the upper transmission surface, which reflects light incident thereon;
lateral reflection surfaces, facing each other at sides of the solid immersion mirror, which reflect light incident thereon; and
a lower transmission region disposed at a center of the lower reflection surface;
wherein light reflected from the lateral reflection surfaces forms a light spot on the lower transmission region,wherein the waveguide core is a flat panel type;
wherein the solid immersion mirror is a flat panel type;
wherein the effective refractive index of the solid immersion mirror is greater than the effective refractive index of the waveguide core; and
wherein the thickness of the solid immersion mirror is greater than the thickness of the waveguide core.
3 Assignments
0 Petitions
Accused Products
Abstract
A near field light generating device generating near field light from incident light by using a solid immersion mirror and a heat assisted magnetic recording head with the same are provided. The near field light generating device includes a light source; a waveguide core which transmits light; and a solid immersion mirror, which generates near field light, including an upper transmission surface through which light from the waveguide core is transmitted into the solid immersion mirror, a lower reflection surface, opposite the upper transmission surface, which reflections light incident thereon, lateral reflection surfaces, facing each other at sides of the solid immersion mirror, which reflect light incident thereon, and a lower transmission region disposed at a center of the lower reflection surface. Light reflected from the lateral reflection surfaces forms a light spot on the lower transmission region.
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Citations
26 Claims
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1. A near field light generating device comprising:
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a light source; a waveguide core which transmits light emitted from the light source; and a solid immersion mirror which generates near field light, comprising; an upper transmission surface through which light from the waveguide core is transmitted into the solid immersion mirror; a lower reflection surface, opposite the upper transmission surface, which reflects light incident thereon; lateral reflection surfaces, facing each other at sides of the solid immersion mirror, which reflect light incident thereon; and a lower transmission region disposed at a center of the lower reflection surface; wherein light reflected from the lateral reflection surfaces forms a light spot on the lower transmission region, wherein the waveguide core is a flat panel type; wherein the solid immersion mirror is a flat panel type; wherein the effective refractive index of the solid immersion mirror is greater than the effective refractive index of the waveguide core; and wherein the thickness of the solid immersion mirror is greater than the thickness of the waveguide core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A heat assisted magnetic recording head, comprising:
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a recording pole which generates magnetic flux leakage for magnetic recording on a recording medium; and a near field light generating device, adjacent to the recording pole, which irradiates light onto the recording medium prior to the magnetic flux leakage, wherein the near field light generating device comprises; a light source a waveguide core which transmits light emitted form the light source; and a solid immersion mirror which generates near field light, comprising; an upper transmission surface through which light from the waveguide core is transmitted into the solid immersion mirror; a lower reflection surface, opposite the upper transmission surface, which reflects light incident thereon; lateral reflection surfaces, facing each other at sides of the solid immersion mirror, which reflect light incident thereon; and a lower transmission region disposed at a center of the lower reflection surface; wherein light reflected from the lateral reflection surfaces forms a light spot on the lower transmission region, wherein the waveguide core is a flat panel type; wherein the solid immersion mirror is a flat panel type; wherein the effective refractive index of the solid immersion mirror is greater than the effective refractive index of the wave guide core; and wherein the thickness of the solid immersion mirror is greater than the thickness of the waveguide core. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification