Energy-assisted magnetic recording head having waveguide capable of providing small beam spots

An energy assisted magnetic recording (EAMR) transducer coupled with a laser for providing energy and having an air-bearing surface (ABS) configured to reside in proximity to a media during use, the EAMR transducer comprising:

• a write pole configured to write to a region of the media;
• at least one coil for energizing the write pole;
• an energy delivery device optically coupled with the laser, the energy delivery device including a Ta2O5 core, a top distal from the ABS, a bottom proximal to the ABS, a first side, a second side opposite to the first side, a first face and a second face opposite and parallel to the first face, the first side having a first apex angle from a normal to the ABS and having a first reflective Au cladding, the second side having a second apex angle from the normal to the ABS and having a second reflective Au cladding, the first apex angle being at least three and not more than twenty-five degrees, the second apex angle being equal to the first apex angle, the first side and the second side converging such that the top is wider than the bottom and such that the energy reflecting between the first side and the second side forms a soliton, wherein the first side and the second side correspond to a cross-track direction on the media and wherein the first face and the second face correspond to a down track direction on the media, the first face and the second face including a cladding having an index of refraction less than a Ta2O5 index of refraction.

An energy assisted magnetic recording (EAMR) disk drive comprising:

• a media for storing data;
• a slider having an air-bearing surface (ABS) configured to reside in proximity to the media during use;
• a laser coupled with the slider for providing energy;
• an EAMR transducer coupled with the slider and including a write pole, at least one coil, and an energy delivery device optically coupled with the laser, the write pole configured to write to a region of the media, the at least one coil for energizing the write pole, the energy delivery device optically coupled with the laser, the energy delivery device including a top distal from the ABS, a bottom proximal to the ABS, a first side and a second side opposite to the first side, the first side having a first apex angle from a normal to the ABS and being reflective, the second side having a second apex angle from the normal to the ABS and being reflective, the first apex angle being at least three and not more than twenty-five degrees, the second apex angle being at least three and not more than twenty-five degrees, the first side and the second side converging such that the top is wider than the bottom and such that the energy reflecting between the first side and the second side forms a soliton substantially at the bottom of the energy delivery device.

An energy assisted magnetic recording (EAMR) disk drive comprising:

• a media for storing data;
• a slider having an air-bearing surface (ABS) configured to reside in proximity to the media during use;
• a laser coupled with the slider for providing energy;
• an EAMR transducer coupled with the slider and including a write pole, at least one coil, and an energy delivery device optically coupled with the laser, the write pole configured to write to a region of the media, the at least one coil for energizing the write pole, the energy delivery device optically coupled with the laser, the energy delivery device including a top distal from the ABS, a bottom proximal to the ABS, a first side and a second side opposite to the first side, the first side having a first apex angle from a normal to the ABS and being reflective, the second side having a second apex angle from the normal to the ABS and being reflective, the first side and the second side converging such that the top is wider than the bottom and such that the energy reflecting between the first side and the second side forms a soliton substantially at the bottom of the energy delivery device, the energy delivery device having a numerical aperture greater than thirty and a length of not more than ten microns in a direction perpendicular to the ABS.