Plasmon generator with metallic waveguide blocker for TAMR

A TAMR (thermally assisted magnetic recording) write head comprising:

• an induction type magnetic writer having a main write pole emerging at a distal ABS (air-bearing surface);
• a waveguide, having a dielectric core, formed adjacent to said main write pole for directing electromagnetic radiation at a plasmon generator;
• said plasmon generator formed alongside and adjacent to said waveguide and beneath said main pole and said plasmon generator being electromagnetically coupled to said waveguide at a distal end of said waveguide, whereby plasmon modes are excited within said plasmon generator due to mode beating, said modes having near-field energy that is directed at a confined region of a recording medium immediately adjacent to said ABS of said main write pole within which confined region said near fields produce Joule heating;
• a scalable, bottom tapered metallic peg emerging distally from said plasmon generator for further concentrating said near-field plasmon energy at said confined region of said recording medium;
• a waveguide blocker formed on a heat sink layer and abutting against said distal end of said waveguide and configured to prevent radiative energy emitted from a distal end of said waveguide from being transferred to said confined region of said recording medium and its surroundings;
• wherein
• said waveguide blocker is of triangular cross-section, having a horizontal base that physically and thermally contacts said heat sink layer and wherein said waveguide blocker has a planar tapered side that is formed at a blocker angle, BWA, to said horizontal base, wherein said planar tapered side is adjacent to and conformal with a similarly tapered side formed on said distal end of said waveguide and separated from said distal end by a dielectric filled uniform gap said dielectric having a smaller refractive index than a dielectric index of said waveguide core.