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。

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。

公开(公告)号：US08045422B2

公开(公告)日：2011-10-25

申请号：US12349956

申请日：2009-01-07

申请人： Eiji Komura ,  Koji Shimazawa

发明人： Eiji Komura ,  Koji Shimazawa

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  B82Y10/00 ,  G11B5/4866 ,  G11B5/6088 ,  G11B5/743 ,  G11B2005/001 ,  G11B2005/0021

摘要： Provided is a near-field light generating element in which as much amount as possible of waveguide light can be coupled with a plasmon antenna. The element comprises a light waveguide and a plasmon antenna comprising a surface or edge for propagating surface plasmon excited by waveguide light, extending to a near-field light generating end. A groove is formed in a waveguide side surface. And at least a portion of the surface or edge is embedded in the groove or located directly above the groove, being opposed to a wall or bottom surface of the groove with a predetermined distance, so as for waveguide light to be coupled with the plasmon antenna in surface plasmon mode. This configuration enables the surface or edge to be located at the position in which the surface or edge can be coupled with more amount of light, thereby to improve the light use efficiency.

摘要翻译： 提供了一种近场光产生元件，其中尽可能多的波导光可以与等离子体激元天线耦合。 元件包括光波导和等离子体激元，其包括用于传播由波导光激发的表面等离子体激元的表面或边缘，延伸到近场光产生端。 在波导侧面形成有槽。 并且所述表面或边缘的至少一部分嵌入在所述凹槽中或者位于所述凹槽的正上方，与所述凹槽的壁或底表面相隔预定距离，以便与所述等离子体天线耦合的波导光 在表面等离子体激元模式。 这种构造使得表面或边缘能够位于表面或边缘可以与更多量的光耦合的位置，从而提高光的使用效率。

公开(公告)号：US08437237B2

公开(公告)日：2013-05-07

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： G11B7/00

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。

公开(公告)号：US08243558B2

公开(公告)日：2012-08-14

申请号：US12363053

申请日：2009-01-30

申请人： Eiji Komura ,  Koji Shimazawa

发明人： Eiji Komura ,  Koji Shimazawa

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/102 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A thermally assisted magnetic head includes a main magnetic pole for writing and a near-field light generator provided near the main magnetic pole, the near-field light generator having a non-magnetic base metal layer, a non-magnetic upper metal layer, an intermediate insulating layer interposed between the base metal layer and the upper metal layer, and the base metal layer having a V-shaped groove and also the upper metal layer having a projection facing the deepest part in the groove of the base metal layer, in a vertical cross-section parallel to a medium facing surface.

摘要翻译： 热辅助磁头包括用于写入的主磁极和设置在主磁极附近的近场光发生器，具有非磁性基底金属层的近场光发生器，非磁性上金属层， 介于基底金属层和上部金属层之间的中间绝缘层，以及具有V形槽的基底金属层，以及具有与基底金属层的沟槽中的最深部分相对的突起的上部金属层， 垂直横截面平行于面向介质的表面。

公开(公告)号：US08130599B2

公开(公告)日：2012-03-06

申请号：US12616924

申请日：2009-11-12

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 ,  G11B5/6088 ,  G11B2005/001 ,  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: an opposed-to-waveguide surface opposed to the waveguide with a predetermined distance; and a propagation edge provided on the side opposite to the opposed-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 can be 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型光学器件包括：与波导相对的与波导相对的预定距离的相对的波导表面; 以及设置在与所述相对的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表面等离子体。 在该光学系统中，产生NFL的点的产生NFL的端面可以位于与波导相对的一侧。

公开(公告)号：US20120026846A1

公开(公告)日：2012-02-02

申请号：US12848422

申请日：2010-08-02

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 ,  G11B5/6088 ,  G11B2005/0005 ,  G11B2005/0021

摘要： Provided is a thermally-assisted magnetic recording head with improved light density of near-field light (NF-light) with which a medium is irradiated. The head comprises: a magnetic pole; a waveguide for propagating light for exciting surface plasmon; a surface plasmon generator provided between the magnetic pole and the waveguide, coupled with the light in a surface plasmon mode, and emitting NF-light; and a clad portion provided at least between the waveguide and the surface plasmon generator and comprising a transition region in which a refractive index decreases along a direction from the waveguide toward the magnetic pole. The provision of the clad portion including the transition region enables improvement of the light density of NF-light due to the convergence of surface plasmon excited in the surface plasmon generator to predetermined locations, while avoiding the problem of temperature rise due to reduction of the volume of surface plasmon generator.

摘要翻译： 提供了一种具有改善的照射介质的近场光（NF光）的光密度的热辅助磁记录头。 磁头包括：磁极; 用于传播激发表面等离子体激元的光的波导; 设置在磁极和波导之间的表面等离子体发生器，与表面等离子体模式的光耦合，并发射NF光; 以及至少在波导管和表面等离子体激元发生器之间设置的包层部分，并且包括其中折射率沿着从波导到磁极的方向减小的过渡区域。 提供包括过渡区域的包层部分能够改善由于在表面等离子体发生器中激发的表面等离子体激元的会聚而导致的NF光的光密度到预定位置，同时避免由于体积的减小导致的温度上升的问题 的表面等离子体发生器。

公开(公告)号：US20110110202A1

公开(公告)日：2011-05-12

申请号：US12616924

申请日：2009-11-12

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 ,  G11B5/6088 ,  G11B2005/001 ,  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: an opposed-to-waveguide surface opposed to the waveguide with a predetermined distance; and a propagation edge provided on the side opposite to the opposed-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 can be 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型光学器件包括：与波导相对的与波导相对的预定距离的相对的波导表面; 以及设置在与所述相对的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表面等离子体。 在该光学系统中，产生NFL的点的产生NFL的端面可以位于与波导相对的一侧。

公开(公告)号：US08089830B2

公开(公告)日：2012-01-03

申请号：US12453508

申请日：2009-05-13

申请人： Makoto Isogai ,  Susumu Aoki ,  Daisuke Miyauchi ,  Eiji Komura ,  Seiichi Takayama

发明人： Makoto Isogai ,  Susumu Aoki ,  Daisuke Miyauchi ,  Eiji Komura ,  Seiichi Takayama

IPC分类号： G11B11/00 ,  G11B5/02 ,  G11B5/48 ,  C23C16/06

CPC分类号： G11B5/314 ,  G11B5/4826 ,  G11B5/6005 ,  G11B2005/001 ,  G11B2005/0021

摘要： A near-field light generating device includes: a waveguide having a groove that opens in the top surface; a clad layer disposed on the top surface of the waveguide and having an opening that is contiguous to the groove; a near-field light generating element accommodated in the opening; and a buffer layer interposed between the near-field light generating element and each of the waveguide and the clad layer in the groove and the opening. The near-field light generating element includes: first and second side surfaces that decrease in distance from each other toward the groove; an edge part that connects the first and second side surfaces to each other and is opposed to the groove with the buffer layer therebetween; and a near-field light generating part that lies at one end of the edge part and generates near-field light.

摘要翻译： 近场光产生装置包括：具有在顶面开口的槽的波导; 包层，设置在波导的顶表面上，并且具有与槽邻接的开口; 容纳在所述开口中的近场光产生元件; 以及介于所述近场光产生元件与所述槽和所述开口中的所述波导和所述包覆层中的每一个之间的缓冲层。 近场光产生元件包括：相对于凹槽彼此间隔距离减小的第一和第二侧表面; 边缘部分，其将所述第一和第二侧表面彼此连接并且与所述凹槽相对，其间具有缓冲层; 以及位于边缘部的一端的近场光产生部，产生近场光。

公开(公告)号：US08295003B2

公开(公告)日：2012-10-23

申请号：US12786915

申请日：2010-05-25

申请人： Tsutomu Chou ,  Seiichi Takayama ,  Eiji Komura

发明人： Tsutomu Chou ,  Seiichi Takayama ,  Eiji Komura

IPC分类号： G11B5/02 ,  G02B6/26 ,  G02B6/42 ,  G02B6/10

CPC分类号： G11B5/314 ,  G02B6/107 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A curved waveguide is a curved waveguide that propagates laser light entering from the laser diode as propagating light. The curved waveguide includes a core that is curved in one direction where the propagating light can be propagated and that includes outer surfaces along a propagating direction of the propagating light defined by four surfaces including first and second planar surfaces that curve in respective planar surfaces and that are positioned to face each other, and inside and outside curved surfaces that connect the first and second planar surfaces: an outside metal cladding that is positioned in a direction orthogonal to an oscillation direction of an electric field of the propagating light in a cross section orthogonal to the propagating direction of the propagating light and along the outside curved surface of the core, that is made of gold, silver, copper or aluminum, or that is primarily composed of one component of these materials; and a cladding layer that covers the first and second planar surfaces and the outside metal clad.

摘要翻译： 弯曲波导是将从激光二极管进入的激光传播成传播光的弯曲波导。 弯曲波导包括在传播光可以传播的一个方向上弯曲的芯，并且包括沿着由四个表面限定的传播光的传播方向的外表面，该四个表面包括在相应的平面中曲线的第一和第二平面表面，并且 定位成彼此面对，以及连接第一和第二平面的内表面和外表面：外侧金属包层，其在与正交于横截面正交的传播光的电场的振荡方向正交的方向上 传播光的传播方向和沿金属，银，铜或铝制成的芯的外部弯曲表面，或主要由这些材料的一种组分组成; 以及覆盖第一和第二平坦表面和外部金属包层的包覆层。