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51. 发明授权

US08243559B2 Thermally-assisted magnetic recording head comprising near-field optical device with propagation edge 有权
标题翻译：包括具有传播边缘的近场光学装置的热辅助磁记录头
公开(公告)号：US08243559B2
公开(公告)日：2012-08-14
申请号：US12617853
申请日：2009-11-13
申请人： Eiji Komura , Tsutomu Chou , Koji Shimazawa
发明人： Eiji Komura , Tsutomu Chou , Koji Shimazawa
IPC分类号： G11B11/00
CPC分类号： G11B5/314 , G11B5/1278 , G11B5/6005 , G11B5/6088 , G11B2005/0005 , G11B2005/0021
摘要： There is provided a near-field-light (NFL) generating optical system in which the point where near-field (NF) light is generated can be provided sufficiently close to the end surface of a magnetic pole that generates write field. The optical system comprises: a waveguide through which a light for exciting surface plasmon propagates; and a NF-optical device configured to be coupled with the light in a surface plasmon mode. The NF-optical device comprises: a contact-to-waveguide surface having a contact to the waveguide; and a propagation edge provided on the side opposite to the contact-to-waveguide surface, extending to the NFL-generating end surface of the device, and configured to propagate thereon the surface plasmon excited by the light. In this optical system, the point, where NF-light is generated, of the NFL-generating end surface is reliably located on the side opposite to the waveguide.
摘要翻译：提供了一种产生近场（NF）光的点的近场光（NFL）产生光学系统，其可以充分靠近生成写入场的磁极的端面附近。该光学系统包括：用于激发表面等离子体激元的光传播的波导; 以及配置成以表面等离子体激发模式与光耦合的NF光学装置。 NF光学器件包括：具有与波导的接触的接触到波导表面; 以及设置在与所述接触到所述波导表面相对的一侧的传播边缘，延伸到所述装置的产生NFL的端面，并且被配置为在其上传播由所述光激发的所述表面等离子体。在该光学系统中，NFL产生端面的产生NF光的点可靠地位于与波导相反的一侧。

52. 发明申请

US20120176874A1 LIGHT SOURCE UNIT INCLUDING A PHOTODETECTOR, AND THERMALLY-ASSISTED MAGNETIC RECORDING HEAD 有权
标题翻译：光源单元，包括一个光电转换器和一个辅助磁记录头
公开(公告)号：US20120176874A1
公开(公告)日：2012-07-12
申请号：US12986532
申请日：2011-01-07
申请人： Eiji KOMURA , Tsutomu CHOU , Koji SHIMAZAWA
发明人： Eiji KOMURA , Tsutomu CHOU , Koji SHIMAZAWA
IPC分类号： G11B13/04 , H01L31/0248 , G11B13/08 , G01D5/32
CPC分类号： G11B5/314 , G01D5/34 , G11B5/6088 , G11B2005/0021
摘要： A light source unit includes a light source and a photodetector. The light source has an emission part for emitting light. The photodetector has a light receiving surface for receiving the light emitted from the emission part, and detects the light. The light source unit further includes a grating made of metal and disposed to extend along the light receiving surface. The grating includes a plurality of line-shaped portions that each extend in a direction intersecting the direction of travel of the light and that are located at positions different from each other along the direction of travel of the light.
摘要翻译：光源单元包括光源和光电检测器。光源具有用于发光的发射部分。光电检测器具有用于接收从发射部分发射的光的光接收表面，并检测光。光源单元还包括由金属制成并被设置为沿着光接收表面延伸的光栅。光栅包括多个线状部分，每个线状部分沿着与光的行进方向交叉的方向延伸，并且位于沿着光的行进方向彼此不同的位置。

53. 发明授权

US08194509B2 Thermally-assisted magnetic recording head comprising light source with photonic-band layer 有权
标题翻译：包括具有光子带层的光源的热辅助磁记录头
公开(公告)号：US08194509B2
公开(公告)日：2012-06-05
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
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。

54. 发明申请

US20120082016A1 OPTICAL WAVEGUIDE AND THERMALLY-ASSISTED MAGNETIC RECORDING HEAD THEREWITH 有权
标题翻译：光波导和热辅助磁记录头
公开(公告)号：US20120082016A1
公开(公告)日：2012-04-05
申请号：US12898063
申请日：2010-10-05
申请人： Eiji Komura , Tsutomu Chou
发明人： Eiji Komura , Tsutomu Chou
IPC分类号： G11B13/08 , G02B6/34
CPC分类号： G02B6/1226 , B82Y20/00 , G02B6/1228 , G02B6/4214 , G11B5/3116 , G11B5/314 , G11B5/6088 , G11B2005/0021
摘要： An optical waveguide of the invention includes a core that is a waveguide through which light propagates; and a cladding that surrounds the core. The core has a plate shape and includes a wide core base part onto which the light is incident, a taper part that is connected to the core base part and of which a width is gradually tapered along a propagation direction, and a narrow front end core part that is connected to the taper part and that extends along the propagation direction. A grating is provided on one of planar surfaces of the wide core base part, the grating is formed by engraving a number of concave grooves having a rectangular cross section on the planar surface along a width direction thereof, the grating is formed to be optically coupled with laser light that is incident perpendicularly onto the grating formation surface, a frequency (grating pitch: pitch of the concave grooves) of the grating is smaller than a wavelength (defined as a wavelength in the cladding) of the perpendicularly incident laser light, and a groove depth H1 of the grating is formed with respect to a thickness H2 of the core base part so that a relationship H1=(0.33 to 0.67)×H2 is satisfied.
摘要翻译：本发明的光波导包括：芯，其是光传播的波导; 以及围绕芯的包层。芯具有板状，并且包括光入射的宽核心基部，与芯基部连接并且宽度沿着传播方向逐渐变细的锥形部，并且窄前端芯连接到锥形部分并且沿着传播方向延伸的部分。光栅设置在宽核心基部的一个平面表面上，光栅通过沿平面的宽度方向雕刻多个具有矩形横截面的凹槽而形成，光栅形成为光耦合利用垂直于光栅形成面入射的激光，光栅的频率（光栅间距：凹槽的间距）小于垂直入射的激光的波长（被定义为包层的波长）），并且相对于芯基部的厚度H2形成光栅的槽深H1，使得满足关系H1 =（0.33〜0.67）×H2。

55. 发明授权

US08149654B2 Wave guide that attenuates evanescent light of higher order TM mode 有权
标题翻译：波导可以衰减高阶TM模式的渐逝光
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。

56. 发明授权

US08116175B2 Heat-assisted magnetic recording head including plasmon generator 有权
标题翻译：热辅助磁记录头包括等离子体发生器
公开(公告)号：US08116175B2
公开(公告)日：2012-02-14
申请号：US12719496
申请日：2010-03-08
申请人： Tsutomu Chou , Eiji Komura , Koji Shimazawa , Shinji Hara
发明人： Tsutomu Chou , Eiji Komura , Koji Shimazawa , Shinji Hara
IPC分类号： G11B11/00
CPC分类号： G11B11/00 , G11B5/02
摘要： A plasmon generator has a near-field light generating part located in a medium facing surface. The plasmon generator has an outer surface including a plasmon exciting surface and a plasmon propagating surface that face toward opposite directions. The plasmon exciting surface is substantially in contact with an evanescent light generating surface of a waveguide's core. The plasmon propagating surface is in contact with a dielectric layer that has a refractive index lower than that of the core. The plasmon exciting surface includes a first width changing portion. The plasmon propagating surface includes a second width changing portion. Each of the first and second width changing portions has a width that decreases with decreasing distance to the medium facing surface, the width being in a direction parallel to the medium facing surface and the evanescent light generating surface.
摘要翻译：等离子体发生器具有位于介质面对表面中的近场光产生部分。等离子体发生器具有外表面，其包括面向相反方向的等离子体激元表面和等离子体激元传播表面。等离子体激元表面基本上与波导芯的瞬逝光产生表面接触。等离子体激元传播表面与折射率低于芯的折射率的电介质层接触。等离子体激元表面包括第一宽度改变部分。等离子体激元传播表面包括第二宽度改变部分。第一和第二宽度改变部分中的每一个具有随着到介质面对表面的距离的减小而减小的宽度，宽度在平行于介质面向表面和渐逝光产生表面的方向上。

57. 发明授权

US08107325B2 Near-field light generating element comprising surface plasmon antenna with surface or edge opposed to waveguide 有权
标题翻译：近场光产生元件包括具有与波导相对的表面或边缘的表面等离子体天线
公开(公告)号：US08107325B2
公开(公告)日：2012-01-31
申请号：US12335943
申请日：2008-12-16
申请人： Eiji Komura , Koji Shimazawa , Daisuke Miyauchi
发明人： Eiji Komura , Koji Shimazawa , Daisuke Miyauchi
IPC分类号： G11B11/00
CPC分类号： G11B5/314 , G11B5/4866 , G11B5/6088 , G11B7/1387 , G11B2005/001 , G11B2005/0021
摘要： Provided is a near-field light generating element in which reduced is the propagation loss of excited surface plasmon that propagates to the near-field light generating end. The element comprises: a waveguide through which light for exciting surface plasmon propagates; and a plasmon antenna comprising a near-field light generating end and a propagation surface or edge. The propagation surface or edge extends to the near-field light generating end, and causes surface plasmon excited by the light to propagate thereon. Further, a portion of the side surface on the near-field light generating end side is opposed to the propagation surface or edge with a predetermined distance so as for the light to be coupled with the plasmon antenna in a surface plasmon mode. In this configuration, surface plasmon can propagates without significantly changing its wavenumber, which leads to a less propagation loss, and to an improved light use efficiency.
摘要翻译：提供了一种近场光产生元件，其中传播到近场光产生端的被激发的表面等离子体激元的传播损耗减小。该元件包括：用于激发表面等离子体激元的光传播的波导; 以及包括近场光产生端和传播表面或边缘的等离子体激元天线。传播表面或边缘延伸到近场光产生端，并且使由光激发的表面等离子体激发在其上。此外，近场光产生端侧的侧面的一部分与传播面或边缘以预定距离相对，以便以等离子体激元模式与等离子体激元天线耦合的光。在这种配置中，表面等离子体激元可以传播而不会明显地改变其波数，这导致较少的传播损耗，并提高光的使用效率。

58. 发明授权

US08098547B2 Optical waveguide and thermal assist magnetic recording head therewith 有权
标题翻译：光波导和热辅助磁记录头
公开(公告)号：US08098547B2
公开(公告)日：2012-01-17
申请号：US12720083
申请日：2010-03-09
申请人： Eiji Komura , Tsutomu Chou , Koji Shimazawa , Seiichi Takayama
发明人： Eiji Komura , Tsutomu Chou , Koji Shimazawa , Seiichi Takayama
IPC分类号： G11B11/00
CPC分类号： G02B6/1228 , B82Y20/00 , G02B6/1226 , G11B5/314 , G11B5/6088 , G11B2005/0021
摘要： An optical waveguide, on account of its ability to apply phase resonance of a wavelength and of a first and second triangular plate-like spot size converter members formed of the same material as a core material and being arranged and formed in a substantially symmetrical structure, can promote shortening of the waveguide length and contrive to reduce the size of the optical waveguide itself. Further, an optical waveguide having excellent spot size conversion efficiency can be obtained even in a reduced size.
摘要翻译：光波导由于其施加波长的相位谐振的能力以及由与芯材相同的材料形成并以基本对称的结构形式构成的第一和第二三角形板状光斑尺寸转换器部件，可以促进波导长度的缩短并且有助于减小光波导本身的尺寸。此外，即使在减小的尺寸的情况下也可以获得具有优异的光斑尺寸转换效率的光波导。

59. 发明授权

US08089831B2 Heat-assisted magnetic recording head including plasmon generator 有权
标题翻译：热辅助磁记录头包括等离子体发生器
公开(公告)号：US08089831B2
公开(公告)日：2012-01-03
申请号：US12710129
申请日：2010-02-22
申请人： Tsutomu Chou , Eiji Komura , Koji Shimazawa , Kosuke Tanaka , Daisuke Miyauchi
发明人： Tsutomu Chou , Eiji Komura , Koji Shimazawa , Kosuke Tanaka , Daisuke Miyauchi
IPC分类号： G11B11/00
CPC分类号： G11B5/314 , G11B5/6088 , G11B2005/001 , G11B2005/0021
摘要： A plasmon generator has an outer surface including a surface plasmon exciting surface, and has a near-field light generating part located in a medium facing surface. The surface plasmon exciting surface is a flat surface that faces an evanescent light generating surface of a waveguide with a predetermined distance therebetween. The surface plasmon exciting surface includes a width changing portion. The width of the width changing portion in a direction parallel to the medium facing surface and the evanescent light generating surface decreases with decreasing distance to the medium facing surface. A magnetic pole is located at such a position that the plasmon generator is interposed between the magnetic pole and the waveguide. The outer surface of the plasmon generator includes a pole contact surface that is in contact with the magnetic pole.
摘要翻译：等离子体发生器具有包括表面等离子体激元表面的外表面，并且具有位于介质面对表面中的近场光产生部。表面等离子体激元表面是面对波导的ev逝光产生表面的平坦表面，其间具有预定的距离。表面等离子体激元表面包括宽度改变部分。宽度改变部分在与面向介质的表面和ev逝光产生表面平行的方向上的宽度随着与面向介质的表面的距离的减小而减小。磁极位于这样的位置，等离子体发生器插入在磁极和波导之间。等离子体发生器的外表面包括与磁极接触的极接触表面。

60. 发明授权

US08077556B2 Thermally assisted magnetic head, head gimbal assembly, and hard disk drive 有权
标题翻译：热辅助磁头，磁头万向节组件和硬盘驱动器
公开(公告)号：US08077556B2
公开(公告)日：2011-12-13
申请号：US12034401
申请日：2008-02-20
申请人： Eiji Komura , Koji Shimazawa , Kosuke Tanaka
发明人： Eiji Komura , Koji Shimazawa , Kosuke Tanaka
IPC分类号： G11B11/24
CPC分类号： G11B5/314 , G11B2005/0021
摘要： A thermally assisted magnetic head has a medium-facing surface facing a magnetic recording medium; a near-field light generator disposed on a light exit face in the medium-facing surface; a magnetic recording element located adjacent to the near-field light generator; and a light emitting element disposed so that emitted light thereof reaches the near-field light generator; the near-field light generator is comprised of a cusp portion and a base portion; when λin represents a wavelength of the emitted light from the light emitting element immediately before the emitted light reaches the near-field light generator, an intensity of near-field light generated when the material forming the cusp portion is irradiated with the light of the wavelength λin is stronger than an intensity of near-field light generated when the material forming the base portion is irradiated with the light of the wavelength λin.
摘要翻译：热辅助磁头具有面向磁记录介质的中等面向表面; 近场光发生器，其布置在所述介质面向表面中的光出射面上; 与所述近场光发生器相邻的磁记录元件; 以及发光元件，其发射光到达近场光发生器; 近场光发生器由尖部和基部构成; 当λin表示在发射光到达近场光发生器之前来自发光元件的发射光的波长时，当形成尖端部分的材料被波长的光照射时产生的近场光的强度当用波长λin的光照射形成基部的材料时，λin比产生的近场光的强度强。

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