公开(公告)号：US20230110250A1

公开(公告)日：2023-04-13

申请号：US18081527

申请日：2022-12-14

Applicant: Seagate Technology LLC

Inventor： Helene Parwana Habibi ,  Simon Bance ,  Martin Liam McGarry ,  Raul Horacio Andruet ,  Martin Giles Blaber ,  Weibin Chen ,  John Charles Duda ,  Mark Anthony Gubbins ,  Erik Jon Hutchinson ,  Vivek Krishnamurthy ,  Michael Allen Seigler ,  Chen Wang

IPC: G11B11/105 ,  G11B11/24 ,  G11B5/40 ,  G11B5/187 ,  G11B5/31 ,  G11B13/08

Abstract: A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.

公开(公告)号：US11120824B1

公开(公告)日：2021-09-14

申请号：US17003355

申请日：2020-08-26

Applicant: Seagate Technology LLC

Inventor： Chubing Peng ,  Vivek Krishnamurthy ,  Nils Jan Gokemeijer

IPC: G11B11/105 ,  G11B5/48 ,  G11B5/60 ,  G11B5/00

Abstract: An apparatus comprises a slider configured for heat-assisted magnetic recording comprising an air bearing surface (ABS). The slider comprises a write pole at or near the ABS, and a near-field transducer (NFT) at or near the ABS and proximate the write pole. A main waveguide is configured to receive light from a laser source and communicate the light to the NFT. An optical power sensor comprises a tap waveguide optically coupled to the main waveguide and comprising a first end and an opposing second end. The optical power sensor also comprises a bolometer optically coupled to the tap waveguide and configured to receive a portion of the light extracted from the main waveguide by the tap waveguide.

公开(公告)号：US10186292B1

公开(公告)日：2019-01-22

申请号：US15966170

申请日：2018-04-30

Applicant: Seagate Technology LLC

Inventor： Vivek Krishnamurthy ,  Tae-Woo Lee ,  Michael Allen Seigler ,  Peng Zhang

IPC: G11B7/00 ,  G11B5/60 ,  G11B5/31 ,  G11B5/48 ,  G11B5/00

Abstract: A recording head has a waveguide core layer that delivers light from a light source to a region proximate a magnetic write pole. A near-field transducer is formed of a thin film of Rh or Ir deposited over the waveguide core layer. The near-field transducer includes an enlarged part with two straight edges facing a media-facing surface and at obtuse angles relative to the media-facing surface. A peg extends from the enlarged part towards the media-facing surface. The waveguide core layer has a terminating end with terminating edges that align with the two straight edges of the near-field transducer.

公开(公告)号：US20240336966A1

公开(公告)日：2024-10-10

申请号：US18607991

申请日：2024-03-18

Applicant: Seagate Technology LLC

Inventor： Vivek Krishnamurthy ,  Aditya Jain ,  Gemma Mendonsa ,  Anil J. Reddy

IPC: C12Q1/6869

CPC classification number: C12Q1/6869

Abstract: A laser-based molecular sequencing system includes a two-dimensional photonic crystal surface emitting laser (PCSEL) array including a plurality of PCSEL devices located in a first layer, each PCSEL device oriented in a direction perpendicular to the first layer. The system also includes a controller configured to modulate a bias on at least one PCSEL device of the plurality of PCSEL devices, the modulation configured to selectively operate each PCSEL device as an emitter or detector at a point in time based on the bias.

公开(公告)号：US11774366B2

公开(公告)日：2023-10-03

申请号：US16986108

申请日：2020-08-05

Applicant: Seagate Technology LLC

Inventor： Gemma Mendonsa ,  Eric K. Wadleigh ,  Vivek Krishnamurthy ,  Riyan A. Mendonsa ,  Martin G. Blaber ,  Krishnan Subramanian

IPC: C12Q1/6869 ,  G01N21/65 ,  C12N9/12 ,  G01N27/447 ,  B82Y30/00

CPC classification number: G01N21/658 ,  C12N9/1252 ,  C12Q1/6869 ,  G01N27/44786 ,  B82Y30/00

Abstract: A Surface-Enhanced Raman Spectroscopy (SERS) device to perform accurate label-free long-read DNA sequencing. A Raman sensor has a hot spot defined by plasmonic nanostructures and excited by at least one laser. An immobilized DNA polymerase can be used to pull a DNA template strand to be sequenced through the hot spot.

公开(公告)号：US11437068B1

公开(公告)日：2022-09-06

申请号：US16943124

申请日：2020-07-30

Applicant: Seagate Technology LLC

Inventor： Vivek Krishnamurthy ,  Scott Eugene Olson ,  Tyler Lenn Perry ,  John Charles Duda

IPC: G11B5/39 ,  G11B13/08 ,  H01S5/028 ,  H01S5/12 ,  H01S5/0683 ,  H01S5/14 ,  G11B5/00

Abstract: A recording head includes an external cavity laser with an externally mounted part having an active region. The external cavity laser also includes a channel waveguide that delivers light towards a media-facing surface. A near-field transducer functions as a reflector, either alone or in combination with a Bragg grating in the channel waveguide. A reflective back facet of the externally mounted part and the reflector define a resonator of the external cavity laser.

公开(公告)号：US11011201B2

公开(公告)日：2021-05-18

申请号：US16520629

申请日：2019-07-24

Applicant: Seagate Technology LLC

Inventor： Helene Parwana Habibi ,  Simon Bance ,  Martin Liam McGarry ,  Raul Horacio Andruet ,  Martin Giles Blaber ,  Weibin Chen ,  John Charles Duda ,  Mark Anthony Gubbins ,  Erik Jon Hutchinson ,  Vivek Krishnamurthy ,  Michael Allen Seigler ,  Chen Wang

IPC: G11B5/31 ,  G11B11/105 ,  G11B11/24 ,  G11B5/40 ,  G11B5/187 ,  G11B13/08 ,  G11B5/00

Abstract: A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.