Waveguide, recording head, and recording device
AssigneeSharp Kabushiki Kaisha
InventorsTazuko Kitazawa, Noboru Iwata
Life of this patent
Estimating the term…
Abstract
Incident light can be efficiently converted into near-field light whose spot size is small. A waveguide 10 includes: a metallic member 11 made of a metallic material; and a dielectric member 12 made of a dielectric material. The metallic member 11 includes a first interface 16 and a second interface 18 so as to sandwich the dielectric member 12. The first interface and the second interface are provided so that an inter-interface distance therebetween may decrease from ends 16c and 18c to ends 16d and 18d. The first interface 16 and the second interface 18 have flections P16 and P18, respectively.
Claims17
A waveguide for converting incident light into near-field light, comprising:
- a metallic member made of a metallic material;
- and
- a dielectric member made of a dielectric material,
- the metallic member sandwiching the dielectric member in such a manner that a first interface and a second interface between the metallic member and the dielectric member are disposed to have a shorter inter-interface distance therebetween toward first ends from second ends thereof, and
- at least one of the first interface and the second interface including a flection.
Dependencies are inferred from the claim text.