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公开(公告)号：US10734019B1
公开(公告)日：2020-08-04
申请号：US16528174
申请日：2019-07-31
发明人： Christopher Neil Harvey , Aidan Dominic Goggin , Kelly Elizabeth Callan , John Bernard McGurk , Reyad Mehfuz
IPC分类号： G11B11/105 , G11B5/48 , G02B6/126 , G02B6/136 , G02B6/132 , G02B6/122 , G11B7/1387 , G02B6/27 , G11B5/60 , G11B5/00
摘要： An apparatus includes an input coupler configured to receive light excited by a light source. A near-field transducer (NFT) is positioned at a media-facing surface of a write head. A layered waveguide is positioned between the input coupler and the NFT and configured to receive the light output from the input coupler in a transverse electric (TE) mode and deliver the light to the NFT in a transverse magnetic (TM) mode. The layered waveguide comprises a first layer extending along a light-propagation direction. The first layer is configured to receive light from the input coupler. The first layer tapers from a first cross track width to a second cross track width where the second cross track width is narrower than the first cross track width. The layered waveguide includes a second layer that is disposed on the first layer. The second layer has a cross sectional area in a plane perpendicular to the light propagation direction that increases along the light propagation direction. The cross sectional area of the second layer is smaller proximate to the input coupler and larger proximate to the NFT. The layered waveguide includes an interface between the first layer and the second layer, the interface comprises a curve.
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公开(公告)号：US10269379B1
公开(公告)日：2019-04-23
申请号：US15874353
申请日：2018-01-18
摘要： A recording head has a waveguide core with an input facet at an input surface. The waveguide core extends to a near-field transducer at a media-facing surface of the recording head. First and second cladding regions are co-planar with and on either cross-track side of the waveguide core. First and second pseudo-slab regions are co-planar with and on outer cross-track sides of the respective first and second cladding regions. The first and second pseudo-slab regions have an index of refraction higher than that of the first and second cladding regions. The first and second pseudo-slab regions confine and channel stray light away from the near-field transducer.
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公开(公告)号：US10692525B2
公开(公告)日：2020-06-23
申请号：US16136389
申请日：2018-09-20
发明人： Aidan Dominic Goggin , Mark Anthony Gubbins , Kelly Elizabeth Callan , Reyad Mehfuz , Marcus B. Mooney , Fadi El Hallak , Paula Frances McElhinney
IPC分类号： G11B7/126 , G11B11/105 , G11B5/48 , G11B5/00 , G11B7/1263 , G11B7/1267 , G11B5/60
摘要： An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer that directs energy resulting from plasmonic excitation to a recording medium. A light detector is configured to detect an amount of light. At least one laser heater is disposed proximate the laser. A controller is configured to control current supplied to the at least one heater based on the detected amount of light.
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公开(公告)号：US20200152230A1
公开(公告)日：2020-05-14
申请号：US16714919
申请日：2019-12-16
摘要： An apparatus includes a first waveguide core extending along a light-propagation direction and configured to receive light from a light source at a combined transverse electric (TE) mode and a transverse magnetic (TM) mode. A second waveguide core is spaced apart from the first waveguide core and is configured to couple light at a TM mode to the second waveguide core. A near-field transducer (NFT) is disposed at a media-facing surface of a write head, the NFT receiving the light from the first waveguide core or the second waveguide core and heating a magnetic recording medium in response thereto.
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公开(公告)号：US20200098391A1
公开(公告)日：2020-03-26
申请号：US16136389
申请日：2018-09-20
发明人： Aidan Dominic Goggin , Mark Anthony Gubbins , Kelly Elizabeth Callan , Reyad Mehfuz , Marcus B. Mooney , Fadi El Hallak , Paula Frances McElhinney
摘要： An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer that directs energy resulting from plasmonic excitation to a recording medium. A light detector is configured to detect an amount of light. At least one laser heater is disposed proximate the laser. A controller is configured to control current supplied to the at least one heater based on the detected amount of light.
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公开(公告)号：US10811043B2
公开(公告)日：2020-10-20
申请号：US16714919
申请日：2019-12-16
摘要： An apparatus includes a first waveguide core extending along a light-propagation direction and configured to receive light from a light source at a combined transverse electric (TE) mode and a transverse magnetic (TM) mode. A second waveguide core is spaced apart from the first waveguide core and is configured to couple light at a TM mode to the second waveguide core. A near-field transducer (NFT) is disposed at a media-facing surface of a write head, the NFT receiving the light from the first waveguide core or the second waveguide core and heating a magnetic recording medium in response thereto.
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公开(公告)号：US20200027478A1
公开(公告)日：2020-01-23
申请号：US16446882
申请日：2019-06-20
发明人： Christopher Neil Harvey , Kelly Elizabeth Callan , Aidan Dominic Goggin , John Bernard McGurk , Reyad Mehfuz , Christopher Gerwyn Ward
IPC分类号： G11B5/48
摘要： A recording head has a waveguide core with an input end proximate an energy source at an input surface of the recording head. The waveguide core couples light from the energy source to a near-field transducer that heats a recording medium in response to the light. An input coupler extends along the waveguide core from the input end to a termination region that is away from the input end in a light propagation direction. The input coupler has a first refractive index between that of the waveguide core and a surrounding material. The input coupler is wider than the waveguide core and has a slanted edge at the termination region. The slanted edge crosses the waveguide core such that the input coupler narrows to a neck away from the waveguide core in a crosstrack direction.
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公开(公告)号：US10388310B1
公开(公告)日：2019-08-20
申请号：US16135251
申请日：2018-09-19
发明人： Christopher Neil Harvey , Aidan Dominic Goggin , Kelly Elizabeth Callan , John Bernard McGurk , Reyad Mehfuz
IPC分类号： G11B11/00 , G11B5/48 , G02B6/122 , G11B11/105 , G11B7/1387 , G02B6/126 , G02B6/132 , G02B6/27 , G02B6/136 , G11B5/00 , G11B5/60
摘要： An apparatus includes an input coupler configured to receive light excited by a light source. A near-field transducer (NFT) is positioned at a media-facing surface of a write head. A layered waveguide is positioned between the input coupler and the NFT and configured to receive the light output from the input coupler in a transverse electric (TE) mode and deliver the light to the NFT in a transverse magnetic (TM) mode. The layered waveguide comprises a first layer extending along a light-propagation direction. The first layer is configured to receive light from the input coupler. The first layer tapers from a first cross track width to a second cross track width where the second cross track width is narrower than the first cross track width. The layered waveguide includes a second layer that is disposed on the first layer. The second layer has a cross sectional area in a plane perpendicular to the light propagation direction that increases along the light propagation direction. The cross sectional area of the second layer is smaller proximate to the input coupler and larger proximate to the NFT. The layered waveguide includes an interface between the first layer and the second layer, the interface comprises a curve.
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