公开(公告)号：US20110228420A1

公开(公告)日：2011-09-22

申请号：US12728890

申请日：2010-03-22

申请人： Shinji Hara ,  Tsutomu Chou ,  Kosuke Tanaka ,  Eiji Komura ,  Koji Shimazawa ,  Daisuke Miyauchi ,  Susumu Aoki ,  Takeshi Tsutsumi

发明人： Shinji Hara ,  Tsutomu Chou ,  Kosuke Tanaka ,  Eiji Komura ,  Koji Shimazawa ,  Daisuke Miyauchi ,  Susumu Aoki ,  Takeshi Tsutsumi

IPC分类号： G11B5/02

CPC分类号： G11B5/314 ,  G11B5/3163 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A plasmon generator has an outer surface including a plasmon exciting part, and has a near-field light generating part located in a medium facing surface. The plasmon exciting part faces an evanescent light generating surface of a waveguide's core with a predetermined distance therebetween. The outer surface of the plasmon generator further includes first and second inclined surfaces that are each connected to the plasmon exciting part. The first and second inclined surfaces increase in distance from each other with increasing distance from the plasmon exciting part. The plasmon generator includes a shape changing portion where the angle of inclination of each of the first and second inclined surfaces with respect to the evanescent light generating surface increases continuously with decreasing distance to the medium facing surface.

摘要翻译： 等离子体发生器具有包括等离子体激元部分的外表面，并且具有位于介质面对表面中的近场光产生部分。 等离子激元激发部分面对波导芯的渐逝光产生表面，其间具有预定的距离。 等离子体发生器的外表面还包括各自连接到等离子体激元部分的第一和第二倾斜表面。 第一和第二倾斜表面随距离等离激子激发部分的距离增加而彼此间距离增加。 等离子体发生器包括形状改变部分，其中第一和第二倾斜表面中的每一个相对于ev逝光产生表面的倾斜角度随着到介质面向表面的距离的减小而连续增加。

公开(公告)号：US08547805B1

公开(公告)日：2013-10-01

申请号：US13432245

申请日：2012-03-28

申请人： Eiji Komura ,  Koji Shimazawa ,  Tsutomu Chou ,  Shinji Hara ,  Kosuke Tanaka ,  Ryo Hosoi

发明人： Eiji Komura ,  Koji Shimazawa ,  Tsutomu Chou ,  Shinji Hara ,  Kosuke Tanaka ,  Ryo Hosoi

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/607 ,  G11B2005/0021

摘要： A thermal assisted magnetic recording head includes a dielectric waveguide that is configured to propagate propagation light a metal waveguide that is provided facing the dielectric waveguide and that couples to the propagation light propagating through the dielectric waveguide in a surface plasmon mode, thereby generating and propagating surface plasmon, a near-field light generator that is exposed on an air bearing surface facing a magnetic recording medium either at an end part of the metal waveguide or at a position facing the end part of the metal waveguide, and that generates near-field light from the surface plasmon, a magnetic pole for magnetic recording that is exposed on the air bearing surface, and a temperature sensor that is arranged inside the dielectric waveguide.

摘要翻译： 热辅助磁记录头包括电介质波导，其被配置为传播传播光，所述介质波导设置成面对介质波导并且以表面等离子体模式耦合到传播通过介质波导的传播光，从而产生和传播表面 等离子体激元，近场光发生器，其在面向金属波导的端部的面向磁记录介质的空气轴承表面上或面对金属波导的端部的位置处暴露，并且产生近场光 从表面等离子体激元，暴露在空气轴承表面上的用于磁记录的磁极，以及布置在电介质波导内部的温度传感器。

公开(公告)号：US08363515B1

公开(公告)日：2013-01-29

申请号：US13397041

申请日：2012-02-15

申请人： Tsutomu Chou ,  Koji Shimazawa ,  Shinji Hara ,  Eiji Komura ,  Ryo Hosoi ,  Kosuke Tanaka

发明人： Tsutomu Chou ,  Koji Shimazawa ,  Shinji Hara ,  Eiji Komura ,  Ryo Hosoi ,  Kosuke Tanaka

IPC分类号： G11B11/00

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

摘要： The thermally-assisted magnetic recording head includes: a magnetic pole; a waveguide propagating light in a first direction, the first direction intersecting with an air bearing surface; a plasmon generator having a base and a projection, the base having a surface, and the projection having a top, standing partially on the surface of the base and extending in the first direction. The plasmon generator has a first portion and a second portion, and the first portion and the second portion are provided in this order from the air bearing surface in a direction away from the air bearing surface. Herein, the top of the projection and the surface of the base in the first portion define a first step, and the top of the projection and the surface of the base in the second portion define a second step. The first step is larger than the second step.

摘要翻译： 热辅助磁记录头包括：磁极; 波导在第一方向传播光，所述第一方向与空气轴承表面相交; 具有基部和突起的等离子体发生器，所述基部具有表面，并且所述突起具有顶部，部分地位于所述基部的所述表面上并沿所述第一方向延伸。 等离子体发生器具有第一部分和第二部分，并且第一部分和第二部分沿着远离空气支承表面的方向从空气轴承表面依次设置。 这里，突起的顶部和第一部分中的基部的表面限定第一步骤，并且突起的顶部和第二部分中的基部的表面限定第二步骤。 第一步大于第二步。

公开(公告)号：US08270261B2

公开(公告)日：2012-09-18

申请号：US12683041

申请日：2010-01-06

申请人： Eiji Komura ,  Tsutomu Chou ,  Koji Shimazawa ,  Kosuke Tanaka

发明人： Eiji Komura ,  Tsutomu Chou ,  Koji Shimazawa ,  Kosuke Tanaka

IPC分类号： G11B11/00

CPC分类号： G11B5/3116 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0005 ,  G11B2005/0021

摘要： Provided is a thermally-assisted magnetic recording head comprising a near-field-light-generating (NFL-generating) optical system with an improved light use efficiency. The head comprises a magnetic pole, a waveguide propagating a light for exciting surface plasmon, and a NF-optical device configured to emit NF-light from its end surface located adjacent to the magnetic pole end surface. The waveguide cross-section, taken by a plane perpendicular to a waveguide edge along elongated direction, has substantially a trapezoidal shape in which a longer side of opposed parallel sides is an edge of the cross-section on the NF-optical device side. This configuration enables a coupled portion of the NF-optical device which is coupled with the light to be placed in the effective distribution range of the light seeping from the waveguide. Consequently, there can be realized a sufficiently strong coupling between the light seeping from the waveguide and the NF-optical device.

摘要翻译： 提供了一种热辅助磁记录头，其包括具有改善的光利用效率的近场光产生（NFL生成）光学系统。 头包括磁极，传播用于激发表面等离子体激元的光的波导和被配置为从其邻近磁极端表面的端表面发射NF光的NF光学装置。 波导横截面由沿着细长方向垂直于波导边缘的平面截取，具有基本上梯形的形状，其中相对的平行边的较长边是NF光学器件侧的横截面的边缘。 该配置使得能够将与光耦合的NF光学器件的耦合部分放置在从波导管渗出的光的有效分布范围内。 因此，可以实现从波导管和NF光学器件渗出的光之间的足够强的耦合。

公开(公告)号：US08125858B2

公开(公告)日：2012-02-28

申请号：US12728890

申请日：2010-03-22

申请人： Shinji Hara ,  Tsutomu Chou ,  Kosuke Tanaka ,  Eiji Komura ,  Koji Shimazawa ,  Daisuke Miyauchi ,  Susumu Aoki ,  Takeshi Tsutsumi

发明人： Shinji Hara ,  Tsutomu Chou ,  Kosuke Tanaka ,  Eiji Komura ,  Koji Shimazawa ,  Daisuke Miyauchi ,  Susumu Aoki ,  Takeshi Tsutsumi

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/3163 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A plasmon generator has an outer surface including a plasmon exciting part, and has a near-field light generating part located in a medium facing surface. The plasmon exciting part faces an evanescent light generating surface of a waveguide's core with a predetermined distance therebetween. The outer surface of the plasmon generator further includes first and second inclined surfaces that are each connected to the plasmon exciting part. The first and second inclined surfaces increase in distance from each other with increasing distance from the plasmon exciting part. The plasmon generator includes a shape changing portion where the angle of inclination of each of the first and second inclined surfaces with respect to the evanescent light generating surface increases continuously with decreasing distance to the medium facing surface.

摘要翻译： 等离子体发生器具有包括等离子体激元部分的外表面，并且具有位于介质面对表面中的近场光产生部分。 等离子激元激发部分面对波导芯的渐逝光产生表面，其间具有预定的距离。 等离子体发生器的外表面还包括各自连接到等离子体激元部分的第一和第二倾斜表面。 第一和第二倾斜表面随距离等离激子激发部分的距离增加而彼此间距离增加。 等离子体发生器包括形状改变部分，其中第一和第二倾斜表面中的每一个相对于ev逝光产生表面的倾斜角度随着到介质面向表面的距离的减小而连续增加。

公开(公告)号：US08462593B1

公开(公告)日：2013-06-11

申请号：US13367767

申请日：2012-02-07

申请人： Eiji Komura ,  Koji Shimazawa ,  Tsutomu Chou ,  Shinji Hara ,  Kosuke Tanaka

发明人： Eiji Komura ,  Koji Shimazawa ,  Tsutomu Chou ,  Shinji Hara ,  Kosuke Tanaka

IPC分类号： G11B11/00

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

摘要： A magnetic head includes a dielectric waveguide to propagate propagation light; a metal waveguide facing the dielectric waveguide, coupling to the propagation light propagating through the dielectric waveguide in a surface plasmon mode, generating first surface plasmon with larger wavenumber than that of the propagation light, and propagating the first surface plasmon; a near-field light generating element facing the metal waveguide and extending to ABS, coupling to the first surface plasmon propagating on the metal waveguide in a surface plasmon mode, generating second surface plasmon with wavenumber larger than that of the first surface plasmon, propagating the second surface plasmon to an end part on the ABS side, and generating near-field light at the end part on the ABS side; and a recording magnetic pole provided in the vicinity of the near-field light generating element and having an end part positioned on the ABS.

摘要翻译： 磁头包括传播传播光的电介质波导; 面向电介质波导的金属波导，以表面等离子体模式耦合到通过电介质波导传播的传播光，产生波数比传播光波数大的第一表面等离子体，并传播第一表面等离子体; 面向金属波导并延伸到ABS的近场光产生元件，以表面等离子体模式耦合到在金属波导上传播的第一表面等离子体激元，产生波数大于第一表面等离子体波的第二表面等离子体，传播 第二表面等离子体激元到ABS侧的端部，并且在ABS侧的端部产生近场光; 以及设置在近场光产生元件附近并具有位于ABS上的端部的记录磁极。

公开(公告)号：US08315129B1

公开(公告)日：2012-11-20

申请号：US13297375

申请日：2011-11-16

申请人： Eiji Komura ,  Koji Shimazawa ,  Tsutomu Chou ,  Kosuke Tanaka

发明人： Eiji Komura ,  Koji Shimazawa ,  Tsutomu Chou ,  Kosuke Tanaka

IPC分类号： G11B11/00

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

摘要： A thermally-assisted magnetic recording head that allows even steeper magnetization reversal between adjacent magnetic domains of a magnetic recording medium and that satisfies the demands of high SN ratio and high recording density is provided. A thermally-assisted magnetic recording head includes a pole that generates a writing magnetic field, a waveguide through which light for exciting surface plasmon propagates, and a plasmon generator that generates near-field light. The waveguide is arranged on a back side of the pole, the plasmon generator has a plane part and a projection part that is projected from the plane part to the waveguide side and that opposes the pole and the waveguide with a predetermined gap, and a projection part opposing surface that opposes the projection part in the pole is configured so as to be distant from the projection part as approaching toward the back side.

摘要翻译： 提供一种热辅助磁记录头，其允许在磁记录介质的相邻磁畴之间更加陡峭的磁化反转，并且满足高SN比和高记录密度的要求。 热辅助磁记录头包括产生书写磁场的磁极，用于激发表面等离子体激元传播的光的波导和产生近场光的等离子体发生器。 波导布置在极的背侧，等离子体发生器具有从平面部分到波导侧突出并且以预定间隙与极和波导相对的平面部分和突出部分，以及突出部 与杆的突出部抵接的部分对置面被配置为当朝向后侧接近时远离突出部。

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：US08023225B2

公开(公告)日：2011-09-20

申请号：US12176127

申请日：2008-07-18

申请人： Koji Shimazawa ,  Hiraku Hirabayashi ,  Kosuke Tanaka ,  Eiji Komura

发明人： Koji Shimazawa ,  Hiraku Hirabayashi ,  Kosuke Tanaka ,  Eiji Komura

IPC分类号： G11B7/135

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

摘要： While an emitting position of light from an optical waveguide and a magnetic pole end part are made closer to each other, high-density writing onto a magnetic recording medium is realized.A thermally assisted magnetic head comprises a main magnetic pole layer having a magnetic pole end part exposed at a medium-opposing surface opposing a magnetic disk, and an optical waveguide for deflecting laser light incident thereon into a laminating direction. The main magnetic pole layer is positioned on a side where the light is deflected by the optical waveguide. The magnetic pole end part projects to the side where the light is deflected by the optical waveguide. The optical waveguide projects more than the magnetic pole end part on the medium-opposing surface side.

摘要翻译： 虽然使来自光波导和磁极端部的光的发射位置彼此靠近，但是实现了对磁记录介质的高密度写入。 热辅助磁头包括具有在与磁盘相对的介质相对表面处露出的磁极端部的主磁极层和用于将入射到其上的激光偏转成层叠方向的光波导。 主磁极层位于光被光波导偏转的一侧。 磁极端部突出到光被光波导偏转的一侧。 光波导在介质相对表面侧上突出超过磁极端部。

公开(公告)号：US20110205661A1

公开(公告)日：2011-08-25

申请号：US12659095

申请日：2010-02-25

申请人： Eiji Komura ,  Koji Shimazawa ,  Kosuke Tanaka

发明人： Eiji Komura ,  Koji Shimazawa ,  Kosuke Tanaka

IPC分类号： G11B5/02 ,  G02F1/035 ,  G02B6/00

CPC分类号： G02B6/1226 ,  B82Y20/00 ,  G02B6/1228 ,  G11B5/314 ,  G11B2005/0005 ,  G11B2005/0021

摘要： An optical waveguide of the present invention is an optical waveguide in order to directly introduce light beams emitted from a light emitting element. In a core that is a waveguide through which light propagates, a concave part is formed that is a depression in a light incident end surface that is one side where light enters. Therefore, an optical waveguide is realized that can obtain a large optical coupling efficiency is possible by the operation of phase alignment in the concave part.

摘要翻译： 本发明的光波导是光波导，用于直接引入从发光元件发射的光束。 在作为光传播的波导的芯中，形成作为光入射的一侧的光入射端面的凹部的凹部。 因此，通过在凹部中的相位对准的操作，可以获得可以获得大的光耦合效率的光波导。