US 11,710,506 B1
Heat-assisted magnetic recording head with a near-field transducer having a multilayer near-field emitter
Chubing Peng, Eden Prairie, MN (US); Tae-Woo Lee, Eden Prairie, MN (US); and Li Wan, Prior Lake, MN (US)
Assigned to SEAGATE TECHNOLOGY LLC, Fremont, CA (US)
Filed by Seagate Technology LLC, Fremont, CA (US)
Filed on Mar. 28, 2022, as Appl. No. 17/656,674.
Int. Cl. G11B 13/08 (2006.01); G11B 5/00 (2006.01)
CPC G11B 13/08 (2013.01) [G11B 2005/0021 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A heat-assisted magnetic recording head comprising a near-field transducer comprising:
a plasmonic disk; and
a multilayer near-field emitter configured to produce a hot spot on a magnetic disk that is proximal to the near-field transducer;
wherein the multilayer near-field emitter is disposed in a down-track direction relative to and coupled to the plasmonic disk, and
wherein the multilayer near-field emitter comprises:
a first layer having a first optical extinction coefficient; and
a second layer coupled to the first layer and haying a second optical extinction coefficient that is different than the first optical extinction coefficient.