公开(公告)号：US08341825B2

公开(公告)日：2013-01-01

申请号：US12947091

申请日：2010-11-16

申请人： Shinji Hara ,  Koji Shimazawa ,  Eiji Komura ,  Tsutomu Chou ,  Seiichi Takayama

发明人： Shinji Hara ,  Koji Shimazawa ,  Eiji Komura ,  Tsutomu Chou ,  Seiichi Takayama

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/314 ,  G02B6/4202 ,  G11B5/105 ,  G11B5/3116 ,  G11B5/6088 ,  G11B2005/0021 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A thermally-assisted magnetic head includes a slider including an air bearing surface (ABS) and a waveguide with a core that extends from a light entering surface to the ABS, and a laser diode (LD) unit attached to the light entering surface. The LD unit faces the light entering surface, and a photo detector faces the ABS. A polarizer that only transmits light having a polarization component orthogonal to a polarization direction of linearly polarized laser light is disposed between the ABS and the photo detector. An LD of the LD unit is activated, and the linearly polarized laser light enters the core from the light entering surface. Light radiated from the ABS enters the polarizer, and an alignment of the slider and the LD unit is performed while the photo detector detects the light transmitted through the polarizer.

摘要翻译： 热辅助磁头包括滑动件，其包括空气轴承表面（ABS）和具有从光进入表面延伸到ABS的芯的波导和附接到光进入表面的激光二极管（LD）单元。 LD单元面向光入射表面，光检测器面向ABS。 只有透射具有与线偏振激光的偏振方向正交的偏振分量的光的偏振器设置在ABS和光电检测器之间。 LD单元的LD被激活，并且线偏振激光从光入射表面进入芯。 从ABS辐射的光进入偏振器，并且在光电检测器检测透过偏振器的光时，执行滑块和LD单元的对准。

公开(公告)号：US08149654B2

公开(公告)日：2012-04-03

申请号：US12729560

申请日：2010-03-23

申请人： Eiji Komura ,  Shinji Hara ,  Seiichi Takayama ,  Koji Shimazawa

发明人： Eiji Komura ,  Shinji Hara ,  Seiichi Takayama ,  Koji Shimazawa

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/3116 ,  G11B5/6088 ,  G11B2005/0021

摘要： A waveguide has a core through which laser light can propagate in a TM mode, that has a rectangular cross section perpendicular to a propagative direction of the laser light, and through which the laser light can propagate in a fundamental mode in which only one portion exists on the cross section of the core where a light intensity of the laser light becomes maximal, and a higher order mode in which two or more portions exist where the light intensity becomes maximal, a clad surrounding the core, and a light absorbing element in the clad, and wherein a distance between the light absorbing element and the core is shorter than a penetration length of evanescent light in the higher order mode, but is longer than a penetration length of evanescent light in the fundamental mode.

摘要翻译： 波导具有核，激光可以以TM模式传播，其具有与激光的传播方向垂直的矩形横截面，激光可以以仅存在一个部分的基本模式传播 在激光的光强度变得最大的核心的横截面上，以及存在光强度变得最大的两个以上部分的高阶模式，围绕芯的包层，以及光吸收元件 并且其中所述光吸收元件和所述芯之间的距离比所述高阶模式中的渐逝光的穿透长度短，但是比所述基模中的渐逝光的穿透长度更长。

公开(公告)号：US20120117791A1

公开(公告)日：2012-05-17

申请号：US12947091

申请日：2010-11-16

申请人： Shinji HARA ,  Koji Shimazawa ,  Eiji Komura ,  Tsutomu Chou ,  Seiichi Takayama

发明人： Shinji HARA ,  Koji Shimazawa ,  Eiji Komura ,  Tsutomu Chou ,  Seiichi Takayama

IPC分类号： G11B5/127

CPC分类号： G11B5/314 ,  G02B6/4202 ,  G11B5/105 ,  G11B5/3116 ,  G11B5/6088 ,  G11B2005/0021 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： In a method for manufacturing a thermally-assisted magnetic head that includes a slider and an LD unit, the slider including an air bearing surface (ABS) that faces a recording medium and including a waveguide with a core for light propagation that extends from a light entering surface, which is different from the ABS, to the ABS, the LD unit being attached to the light entering surface of the slider, and the thermally-assisted magnetic head performing magnetic recording while heating the recording medium with near-field light that is excited from linearly polarized laser light, the LD unit is disposed in a position facing the light entering surface of the slider, a photo detector is disposed in a position facing the ABS of the slider, and a polarizer transmitting only light having a polarization component that is orthogonal to a polarization direction of the linearly polarized laser light is disposed between the ABS and the photo detector. An LD of the LD unit is activated, and the linearly polarized laser light is enabled to enter into the core from the light entering surface of the slider. Light radiated from the ABS is enabled to enter into the polarizer, and an alignment of the slider and the LD unit is performed while the photo detector detects light that is transmitted through the polarizer.

摘要翻译： 在制造包括滑块和LD单元的热辅助磁头的方法中，滑块包括面向记录介质的空气轴承表面（ABS），该空气轴承表面包括具有从光线延伸的光传播用核心的波导 进入与ABS不同的表面，将LD单元附着到滑块的光进入表面，并且热辅助磁头在用近场光加热记录介质的同时进行磁记录 从线偏振激光激发，LD单元被设置在面向滑块的光进入表面的位置，光电检测器设置在面向滑块的ABS的位置，偏振器仅透射具有偏振分量的光， 与线偏振激光的偏振方向垂直的方式设置在ABS和光电检测器之间。 LD单元的LD被激活，并且线偏振激光能够从滑块的光进入表面进入芯中。 从ABS辐射的光能够进入偏振器，并且当光电检测器检测到透射通过偏振器的光时，执行滑块和LD单元的对准。

公开(公告)号：US08441895B2

公开(公告)日：2013-05-14

申请号：US12622962

申请日：2009-11-20

申请人： Koji Shimazawa ,  Seiichi Takayama ,  Eiji Komura ,  Osamu Shindo ,  Takashi Honda

发明人： Koji Shimazawa ,  Seiichi Takayama ,  Eiji Komura ,  Osamu Shindo ,  Takashi Honda

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A thermally-assisted magnetic recording head is provided, in which the light-source output can be adjusted according to its variation by environmental influences and over time. The head comprises: a light source; a write head element provided in a element-integration surface; an optical system provided in the element-integration surface and configured to guide a light emitted from the light source to the vicinity of one end of the write head element; and a light detector for monitoring the light-source output, provided in the element-integration surface and comprising a light-receiving surface covering an area directly above at least a portion of the optical system. This light detector with such a light-receiving surface can detect a leakage light emitted from the optical system as a monitoring light. Therefore, feedback adjustment of the light-source output can be realized to stabilize the intensity of light for thermal-assist applied to a magnetic recording medium.

摘要翻译： 提供了一种热辅助磁记录头，其中可以根据环境影响和随时间的变化来调节光源输出。 头包括：光源; 设置在元件集成表面中的写入头元件; 光学系统，设置在所述元件一体化表面中并且被配置为将从所述光源发射的光引导到所述写入头元件的一端附近; 以及光检测器，用于监测元件整合表面中的光源输出，并包括覆盖光学系统的至少一部分正上方的区域的光接收表面。 具有这种光接收表面的光检测器可以检测从光学系统发射的泄漏光作为监测光。 因此，可以实现光源输出的反馈调整，以稳定施加到磁记录介质的热辅助的光的强度。

公开(公告)号：US20110026377A1

公开(公告)日：2011-02-03

申请号：US12512249

申请日：2009-07-30

申请人： Koji Shimazawa ,  Seiichi Takayama ,  Tsutomu Chou ,  Eiji Komura

发明人： Koji Shimazawa ,  Seiichi Takayama ,  Tsutomu Chou ,  Eiji Komura

IPC分类号： G11B11/00 ,  G11B5/02

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A thermally-assisted magnetic recording head is provided, in which a light source having sufficiently high output power for performing thermal-assist is disposed in the element-integration surface of the substrate to achieve improved mass-productivity. The head includes: a light source having a multilayered structure including a photonic-band layer and having a light-emitting surface opposed to the element-integration surface; a diffraction optical element that converges the emitted light; a light-path changer that changes the direction of the converged light; a waveguide that propagates the direction-changed light toward the opposed-to-medium surface; and a magnetic pole that generates write field. The surface-emitting type light source includes a photonic-band layer having a periodic structure in which a light from an active region resonates, and thus emits laser light on a quite different principle from a VCSEL. Therefore, the light source can be disposed in the element-integration surface, even though having sufficiently high output power.

摘要翻译： 提供了一种热辅助磁记录头，其中具有足够高输出功率的用于进行热辅助的光源设置在基板的元件集成表面中，以实现提高的批量生产率。 头包括：具有包括光子带层并且具有与元件一体化表面相对的发光表面的多层结构的光源; 会聚发射光的衍射光学元件; 改变会聚光的方向的光路改变器; 波导，其将所述方向改变的光传播到所述相对中介表面; 以及产生写入场的磁极。 表面发射型光源包括具有周期性结构的光子带层，其中来自有源区的光谐振，从而以与VCSEL完全不同的原理发射激光。 因此，即使具有足够高的输出功率，也可以将光源配置在元件一体化表面。

公开(公告)号：US08223596B2

公开(公告)日：2012-07-17

申请号：US12581385

申请日：2009-10-19

申请人： Tsutomu Chou ,  Eiji Komura ,  Koji Shimazawa ,  Seiichi Takayama

发明人： Tsutomu Chou ,  Eiji Komura ,  Koji Shimazawa ,  Seiichi Takayama

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A thermally-assisted magnetic recording head includes a surface-emitting type light source for emitting substantially collimated beam, a first diffraction optical element for focusing the substantially collimated beam emitted from the surface-emitting type light source, a second diffraction optical element for collimating the light beam focused by the first diffraction optical element, a waveguide integrally formed with the second diffraction optical element and made of the material as that of second diffraction optical element, the light beam collimated by the second diffraction optical element being incident to the waveguide, an optical-path direction conversion element for converting a direction of an optical path of the incident light beam to a propagation direction of the waveguide, the propagation direction being toward an opposed-to-medium surface, and a magnetic pole for generating write field from its end face on the opposed-to-medium surface side.

摘要翻译： 热辅助磁记录头包括用于发射基本上准直的光束的表面发射型光源，用于聚焦从表面发射型光源发射的基本上准直的光束的第一衍射光学元件，用于准直 由第一衍射光学元件聚焦的光束，与第二衍射光学元件整体形成并由第二衍射光学元件的材料制成的波导，由第二衍射光学元件准直的光束入射到波导， 光路方向转换元件，用于将入射光束的光路的方向转换为波导的传播方向，传播方向朝向相对中间的表面;以及用于从其产生写入场的磁极 在相对中的表面侧上的端面。

公开(公告)号：US08116172B2

公开(公告)日：2012-02-14

申请号：US12320930

申请日：2009-02-09

申请人： Yasuhiro Ito ,  Seiichi Takayama ,  Eiji Komura ,  Koji Shimazawa ,  Satoshi Tomikawa ,  Shuichi Okawa

发明人： Yasuhiro Ito ,  Seiichi Takayama ,  Eiji Komura ,  Koji Shimazawa ,  Satoshi Tomikawa ,  Shuichi Okawa

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B7/122 ,  G11B7/1387 ,  G11B11/10534 ,  G11B11/1058 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A near-field light generating device includes: a base having a top surface; a waveguide that allows laser light to propagate therethrough and is disposed above the top surface of the base; and a surface plasmon generating element that is disposed above the top surface of the base so as to adjoin the waveguide in a direction parallel to the top surface of the base. The waveguide has a side surface that faces the surface plasmon generating element. The surface plasmon generating element includes: a coupling part that is opposed to a part of the side surface of the waveguide with spacing therebetween and causes excitation of a surface plasmon by coupling with evanescent light occurring from the part of the side surface; and a near-field light generating part that generates near-field light based on the surface plasmon excited at the coupling part.

摘要翻译： 近场光产生装置包括：具有顶表面的底座; 波导，其允许激光通过其传播并设置在基座的顶表面上方; 以及表面等离子体激元产生元件，其设置在所述基座的顶表面之上，以便在与所述基座的顶表面平行的方向上邻接所述波导。 波导具有面向表面等离子体激元产生元件的侧表面。 表面等离子体发生元件包括：耦合部分，其与波导的侧表面的一部分相对，并且通过与从侧表面的部分发生的渐逝光耦合而引起表面等离子体激发; 以及基于在耦合部激发的表面等离子体激元产生近场光的近场光产生部。

公开(公告)号：US08000178B2

公开(公告)日：2011-08-16

申请号：US12260639

申请日：2008-10-29

申请人： Koji Shimazawa ,  Eiji Komura ,  Yasuhiro Ito ,  Seiichi Takayama ,  Satoshi Tomikawa ,  Daisuke Miyauchi ,  Kosuke Tanaka

发明人： Koji Shimazawa ,  Eiji Komura ,  Yasuhiro Ito ,  Seiichi Takayama ,  Satoshi Tomikawa ,  Daisuke Miyauchi ,  Kosuke Tanaka

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  B82Y20/00 ,  G02B6/1226 ,  G11B5/4866 ,  G11B2005/001 ,  G11B2005/0021

摘要： Provided is a surface plasmon antenna that can be set so that the emitting position on the end surface of the plasmon antenna where near-field light is emitted is located sufficiently close to the end of a magnetic pole. The surface plasmon antenna comprises an edge having a portion for coupling with a light in a surface plasmon mode. The edge is provided for propagating surface plasmon excited by the light and extends from the portion to a near-field light generating end surface that emits near-field light. The edge for propagating surface plasmon is a very narrow propagation region. Therefore, the near-field light generating end surface, which appears as a polished surface processed through polishing in the manufacturing of the plasmon antenna, can be made a shape with a very small size, and further can be set so that surface plasmon propagates to reach the end surface reliably.

摘要翻译： 提供了一种表面等离子体激元天线，其可以被设置为使得发射近场光的等离子体激元天线的端面上的发射位置足够靠近磁极的端部。 表面等离子体激元天线包括具有用于与表面等离子体激元模式的光耦合的部分的边缘。 该边缘用于传播由光激发的表面等离子体激元，并从该部分延伸到发射近场光的近场光产生端面。 传播表面等离子体激元的边缘是非常窄的传播区域。 因此，通过在等离子体激元天线的制造中通过研磨处理的抛光面的近场光产生端面可以形成为非常小的形状，并且还可以将表面等离子体激元传播到 可靠地到达端面。

公开(公告)号：US07855937B2

公开(公告)日：2010-12-21

申请号：US12205484

申请日：2008-09-05

申请人： Koji Shimazawa ,  Eiji Komura ,  Yasuhiro Ito ,  Seiichi Takayama ,  Satoshi Tomikawa ,  Daisuke Miyauchi ,  Kosuke Tanaka

发明人： Koji Shimazawa ,  Eiji Komura ,  Yasuhiro Ito ,  Seiichi Takayama ,  Satoshi Tomikawa ,  Daisuke Miyauchi ,  Kosuke Tanaka

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/4866 ,  G11B11/10536 ,  G11B11/1058 ,  G11B2005/0005 ,  G11B2005/0021

摘要： Provided is a near-field light generating element capable of avoiding excessive temperature rise, which comprises a waveguide and a near-field light generating layer. The layer comprises: a propagation surface on which surface plasmon excited by the light propagates; and a near-field light generating end at which near-field light is generated. The end is one end of the propagation surface. And a portion of the side surface of the waveguide is opposed to a portion of the propagation surface of the near-field light generating layer with a predetermined spacing so that the light propagating through the waveguide is coupled with the near-field light generating layer in a surface plasmon mode. The near-field light generating layer is preferably tapered toward the near-field light generating end.

摘要翻译： 本发明提供能够避免温度过高的近场光发生元件，其包括波导管和近场光产生层。 该层包括：由光激发的表面等离子体激发的传播表面; 以及产生近场光的近场光产生端。 最后是传播表面的一端。 并且波导的侧面的一部分与近场光产生层的传播表面的一部分以预定的间隔相对，使得通过波导传播的光与近场光产生层耦合 表面等离子体激元模式。 近场光产生层优选地朝向近场光产生端逐渐变细。

公开(公告)号：US20100079895A1

公开(公告)日：2010-04-01

申请号：US12239141

申请日：2008-09-26

申请人： Seiichi Takayama ,  Eiji Komura ,  Kosuke Tanaka ,  Daisuke Miyauchi ,  Koji Shimazawa

发明人： Seiichi Takayama ,  Eiji Komura ,  Kosuke Tanaka ,  Daisuke Miyauchi ,  Koji Shimazawa

IPC分类号： G11B5/02 ,  G21G4/00 ,  G11B5/48

CPC分类号： G11B5/314 ,  G11B5/3116 ,  G11B7/122 ,  G11B7/1387 ,  G11B11/10536 ,  G11B2005/0005 ,  G11B2005/0021

摘要： Provided is a plasmon antenna in which a near-field light having a sufficient intensity is generated only in a desired location. The plasmon antenna comprises an end surface on a side where a near-field light is generated; the end surface is flat and has a shape with at least three vertexes or rounded corners; and an end surface of the plasmon antenna which is opposite to the flat end surface and receives light, is inclined with respect to the flat end surface so as to become closer to the flat end surface toward one of the at least three vertexes or rounded corners. When the light-receiving end surface of the plasmon antenna is irradiated with the light, a near-field light having a sufficient intensity can be generated at only the vertex or rounded corner toward which the entire plasmon antenna becomes thinner.

摘要翻译： 提供了一种等离子体激元天线，其中仅在期望的位置产生具有足够强度的近场光。 等离子体激元天线包括在产生近场光的一侧上的端面; 端面平坦，具有至少三个顶点或圆角的形状; 以及等离子体激元天线的与平坦端面相对并且接收光的端面相对于平坦端面倾斜，以朝着至少三个顶点或圆角中的一个变得更靠近平坦端面 。 当等离子体激元的光接收端面用光照射时，只能在整个等离子体天线变薄的顶点或圆角处产生具有足够强度的近场光。