公开(公告)号：US20240310866A1

公开(公告)日：2024-09-19

申请号：US18603512

申请日：2024-03-13

Applicant: Seagate Technology LLC

Inventor： Vivek Krishnamurthy ,  Aditya Jain ,  Richard Charles Alexander Pitwon ,  Anil J. Reddy

IPC: G06E3/00 ,  G02B1/00

CPC classification number: G06E3/00 ,  G02B1/005

Abstract: A laser-based computing system includes a two-dimensional photonic crystal surface emitting laser (PCSEL) array including a plurality of PCSEL emitters located in a first layer, each emitter oriented in a direction perpendicular to a plane formed by the first layer, where the plurality of PCSEL emitters form a preset pattern within the first layer, and a controller operatively connected to the plurality of PCSEL emitters, the controller configured to modulate phase and/or amplitude of a beam emitted by a PCSEL emitter of the plurality of PCSEL emitters.

公开(公告)号：US11538496B2

公开(公告)日：2022-12-27

申请号：US17319444

申请日：2021-05-13

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 ,  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.

公开(公告)号：US20210027809A1

公开(公告)日：2021-01-28

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: G11B11/105 ,  G11B11/24

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：US10714137B1

公开(公告)日：2020-07-14

申请号：US16353237

申请日：2019-03-14

Applicant: Seagate Technology LLC

Inventor： Vivek Krishnamurthy ,  TaeWoo Lee ,  Michael Allen Seigler ,  Peng Zhang ,  Martin Giles Blaber

IPC: G11B11/105 ,  G11B5/60 ,  G11B5/31 ,  G11B5/00 ,  G11B5/48

Abstract: A recording head includes a waveguide core layer that delivers light from a light source to a region proximate a magnetic write pole. A near-field transducer that is formed of a thin metal film is 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 near-field transducer includes a metal aperture plate at the media-facing surface. The metal aperture plate surrounds at least three sides of the end of the peg.

公开(公告)号：US11823708B1

公开(公告)日：2023-11-21

申请号：US17877478

申请日：2022-07-29

Applicant: Seagate Technology LLC.

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

IPC: G11B11/105 ,  G11B5/00 ,  G11B13/08 ,  H01S5/14 ,  H01S5/028 ,  H01S5/0683 ,  H01S5/12

CPC classification number: G11B13/08 ,  H01S5/028 ,  H01S5/06837 ,  H01S5/1215 ,  H01S5/141 ,  G11B2005/0021

Abstract: An external cavity laser of a recording head includes a channel waveguide that delivers light towards a media-facing surface of the recording head. The laser includes an externally mounted part with an active region having a longitudinal axis corresponding to a light propagation direction of the channel waveguide. The externally mounted part has a reflective back facet and anti-reflective front facet. The laser includes a near-field transducer at an end of the channel waveguide proximate the media facing surface. The reflective back facet and the near-field transducer define a resonator of the external cavity laser.

公开(公告)号：US11574648B2

公开(公告)日：2023-02-07

申请号：US17400570

申请日：2021-08-12

Applicant: Seagate Technology LLC

Inventor： Chubing Peng ,  Vivek Krishnamurthy ,  Nils Jan Gokemeijer

IPC: G11B5/31 ,  G11B5/48 ,  G11B5/60 ,  G11B5/187 ,  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：US20220068301A1

公开(公告)日：2022-03-03

申请号：US17400570

申请日：2021-08-12

Applicant: Seagate Technology LLC

Inventor： Chubing Peng ,  Vivek Krishnamurthy ,  Nils Jan Gokemeijer

IPC: G11B5/48 ,  G11B5/60

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：US20210366515A1

公开(公告)日：2021-11-25

申请号：US17319444

申请日：2021-05-13

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：US20210148828A1

公开(公告)日：2021-05-20

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: G01N21/65 ,  C12N9/12 ,  C12Q1/6869 ,  G01N27/447

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：US12094491B2

公开(公告)日：2024-09-17

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 ,  G11B5/187 ,  G11B5/31 ,  G11B5/40 ,  G11B11/24 ,  G11B13/08 ,  G11B5/00

CPC classification number: G11B11/10536 ,  G11B5/187 ,  G11B5/3106 ,  G11B5/3116 ,  G11B5/3133 ,  G11B5/3136 ,  G11B5/314 ,  G11B5/40 ,  G11B11/24 ,  G11B13/08 ,  G11B2005/0021

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.