Patent ID: 9087531
Filing Date: 2015-07-21
Classification: G11B

Abstract:
1. A magnetic recording head comprising: a magnetic pole that applies a recording magnetic field to a recording medium; a light generating element configured to generate light to heat a recording surface of the recording medium; and a waveguide on a leading side of the light generating element to guide an incident light to the light generating element, wherein the waveguide includes: a first waveguide having an incident surface into which the light enters, and a second waveguide having a first surface facing the first waveguide, through which the light from the first waveguide enters, and a second surface facing the light generating element and extending substantially perpendicular to the recording surface of the recording medium, through which the light entering the light generating element passes, a refractive index of the second waveguide being different from a refractive index of the first waveguide.