公开(公告)号：US08248890B2

公开(公告)日：2012-08-21

申请号：US12946196

申请日：2010-11-15

申请人： Eiji Komura ,  Tsutomu Chou ,  Koji Shimazawa

发明人： Eiji Komura ,  Tsutomu Chou ,  Koji Shimazawa

IPC分类号： G11B7/00 ,  G11B7/08

CPC分类号： G11B5/314 ,  B82Y20/00 ,  G02B6/1226 ,  G11B5/105 ,  G11B5/3116 ,  G11B5/6088 ,  G11B2005/0021

摘要： Provided is a surface plasmon resonating optical system emitting near-field light (NF-light) with a higher light density. The system comprises: a waveguide through which a light for exciting surface plasmon propagates; a plasmon generator that couples with the light in a surface plasmon mode and emits NF-light from its NF-light generating end surface; and a resonator mirror that reflects the excited surface plasmon, provided on the side of the plasmon generator opposite to the NF-light generating end surface. In the system, the excited surface plasmon can be amplified by using a resonator structure while reducing the length of the plasmon generator to reduce absorption of surface plasmon and prevent overheating of the plasmon generator.

摘要翻译： 提供了具有较高光密度的发射近场光（NF-光）的表面等离子体共振光学系统。 该系统包括：用于激发表面等离子体激元的光传播的波导; 等离子体发生器，其以表面等离子体模式耦合光并从其NF光产生端表面发射NF光; 以及反射激发的表面等离子体的谐振镜，设置在等离子体发生器的与NF发光端面相对的一侧。 在该系统中，可以通过使用谐振器结构来放大激发的表面等离子体激元，同时减少等离子体发生器的长度以减少表面等离子体的吸收并防止等离子体发生器的过热。

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。

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：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。

公开(公告)号：US20110292772A1

公开(公告)日：2011-12-01

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： G11B11/00 ,  G02B6/036

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。

公开(公告)号：US08400886B2

公开(公告)日：2013-03-19

申请号：US13204026

申请日：2011-08-05

申请人： Shinji Hara ,  Tsutomu Chou ,  Eiji Komura

发明人： Shinji Hara ,  Tsutomu Chou ,  Eiji Komura

IPC分类号： G11B11/00

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

摘要： A thermally-assisted magnetic recording head that includes a pole that generates a writing magnetic field, a waveguide through which light propagates, a plasmon generator that surface-evanescent-couples with the light propagating through the waveguide, wherein the plasmon generator includes a portion where a cross-sectional area gradually decreases as going toward a depth side from an air bearing surface when being observed from a cross section parallel to the air bearing surface. The volume of the plasmon generator can be decreased and an exposed area of a front surface on the air bearing surface can be increased. When a thermal expansion from the temperature increase occurs in the plasmon generator, a rate that the plasmon generator projects from the air bearing surface is suppressed to extremely low levels. Accordingly, a chronological degradation of output can be suppressed and thermally-assisted recording having a high and long-term reliability is achieved.

摘要翻译： 一种热辅助磁记录头，其包括产生写入磁场的极，光传播的波导，与通过波导传播的光表面衰减耦合的等离子体发生器，其中等离子体激元发生器包括 当从平行于空气轴承表面的横截面观察时，横截面积随着从空气轴承表面的深度侧逐渐减小。 可以减小等离子体发生器的体积，并且可以增加空气轴承表面上的前表面的暴露面积。 当在等离子体发生器中发生温度升高的热膨胀时，等离子体发生器从空气轴承表面突出的速率被抑制到极低的水平。 因此，可以抑制输出的时间性降低，并且实现具有高和长期可靠性的热辅助记录。

公开(公告)号：US08351308B2

公开(公告)日：2013-01-08

申请号：US12892540

申请日：2010-09-28

申请人： Tsutomu Chou ,  Eiji Komura ,  Shinji Hara ,  Kosuke Tanaka ,  Daisuke Miyauchi

发明人： Tsutomu Chou ,  Eiji Komura ,  Shinji Hara ,  Kosuke Tanaka ,  Daisuke Miyauchi

IPC分类号： G11B11/00

CPC分类号： G11B5/3116 ,  G02B5/008 ,  G11B5/314 ,  G11B5/3163 ,  G11B2005/0021

摘要： A thermally assisted magnetic head includes a magnetic pole that generates a writing magnetic field from an air bearing surface (ABS); a waveguide through which light propagates; and a plasmon generator generating near-field light from a near-field light generating end surface by coupling the light thereto in a surface plasmon mode. The magnetic pole includes a convex part protruding in a substantially V-shape along a light propagation direction of the waveguide. The plasmon generator includes a substantially V-shaped part contacting the convex part, and as seen from a side of the ABS, a thickness of the plasmon generator in a direction perpendicular to convex part contacting sides gradually increases from an end in a direction away from the waveguide, the convex part contacting sides being linear sides that form the substantially V-shaped part of the plasmon generator and contacting the convex part.

摘要翻译： 热辅助磁头包括从空气轴承表面（ABS）产生书写磁场的磁极; 光传播的波导; 以及等离子体发生器，其通过以表面等离子体激发模式将光耦合到其上，从近场光产生端面产生近场光。 磁极包括沿波导的光传播方向大致V形突出的凸部。 等离子体发生器包括接触凸部的大致V形部分，并且从ABS的侧面看，等离子体发生器在与凸部接触的方向垂直的方向上的厚度从远离方向的端部逐渐增加 所述波导，所述凸部接触侧为直线侧，其形成所述等离子体发生器的大致V形部分并接触所述凸部。

公开(公告)号：US20120075967A1

公开(公告)日：2012-03-29

申请号：US12892540

申请日：2010-09-28

申请人： Tsutomu Chou ,  Eiji Komura ,  Shinji Hara ,  Kosuke Tanaka ,  Daisuke Miyauchi

发明人： Tsutomu Chou ,  Eiji Komura ,  Shinji Hara ,  Kosuke Tanaka ,  Daisuke Miyauchi

IPC分类号： G11B11/24

CPC分类号： G11B5/3116 ,  G02B5/008 ,  G11B5/314 ,  G11B5/3163 ,  G11B2005/0021

摘要： A thermally assisted magnetic head includes a magnetic pole that generates a writing magnetic field from an air bearing surface (ABS); a waveguide through which light propagates; and a plasmon generator generating near-field light from a near-field light generating end surface by coupling the light thereto in a surface plasmon mode. The magnetic pole includes a convex part protruding in a substantially V-shape along a light propagation direction of the waveguide. The plasmon generator includes a substantially V-shaped part contacting the convex part, and as seen from a side of the ABS, a thickness of the plasmon generator in a direction perpendicular to convex part contacting sides gradually increases from an end in a direction away from the waveguide, the convex part contacting sides being linear sides that form the substantially V-shaped part of the plasmon generator and contacting the convex part.

摘要翻译： 热辅助磁头包括从空气轴承表面（ABS）产生书写磁场的磁极; 光传播的波导; 以及等离子体发生器，其通过以表面等离子体激发模式将光耦合到其上，从近场光产生端面产生近场光。 磁极包括沿波导的光传播方向大致V形突出的凸部。 等离子体发生器包括接触凸部的大致V形部分，并且从ABS的侧面看，等离子体发生器在与凸部接触的方向垂直的方向上的厚度从远离方向的端部逐渐增加 所述波导，所述凸部接触侧为直线侧，其形成所述等离子体发生器的大致V形部分并接触所述凸部。

公开(公告)号：US20110228419A1

公开(公告)日：2011-09-22

申请号：US12728600

申请日：2010-03-22

申请人： Kosuke Tanaka ,  Daisuke Miyauchi ,  Susumu Aoki ,  Tetsuya Roppongi ,  Tsutomu Chou ,  Shinji Hara ,  Eiji Komura

发明人： Kosuke Tanaka ,  Daisuke Miyauchi ,  Susumu Aoki ,  Tetsuya Roppongi ,  Tsutomu Chou ,  Shinji Hara ,  Eiji Komura

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 propagation edge, and has a near-field light generating part lying at an end of the propagation edge and located in a medium facing surface. The propagation edge faces an evanescent light generating surface of a waveguide's core with a predetermined distance therebetween and extends in a direction perpendicular to the medium facing surface. The propagation edge is arc-shaped in a cross section parallel to the medium facing surface. The plasmon generator includes a shape changing portion in which a radius of curvature of the propagation edge in the cross section parallel to the medium facing surface continuously decreases with decreasing distance to the medium facing surface.

摘要翻译： 等离子体发生器具有包括传播边缘的外表面，并且具有位于传播边缘的末端并位于面向介质的表面中的近场光产生部分。 传播边缘面向波导芯的ev逝光产生表面，其间具有预定距离，并且在垂直于介质面向表面的方向上延伸。 传播边缘在平行于面向介质的表面的横截面中是弧形的。 等离子体发生器包括形状改变部分，其中平面于介质面向表面的横截面中的传播边缘的曲率半径随着到面向介质的表面的距离的减小而连续地减小。

公开(公告)号：US08264920B1

公开(公告)日：2012-09-11

申请号：US13191913

申请日：2011-07-27

申请人： Tsutomu Chou ,  Eiji Komura ,  Shinji Hara ,  Daisuke Miyauchi ,  Kosuke Tanaka

发明人： Tsutomu Chou ,  Eiji Komura ,  Shinji Hara ,  Daisuke Miyauchi ,  Kosuke Tanaka

IPC分类号： G11B11/00 ,  G11B7/135

CPC分类号： G11B5/314 ,  B82Y20/00 ,  G02B6/1226 ,  G11B5/3116 ,  G11B5/6088 ,  G11B2005/0021

摘要： A near-field light generator includes a waveguide, a plasmon generator, and a metal layer. The waveguide includes a core having an evanescent light generating surface. The plasmon generator includes a base part, and a protruding part that protrudes from the base part toward the evanescent light generating surface. The protruding part has: a front end face located at an end in a direction parallel to the evanescent light generating surface; a band-shaped flat surface facing toward the evanescent light generating surface; and two side surfaces connected to the flat surface. In at least a portion of the protruding part, the distance between the two side surfaces increases with increasing distance from the evanescent light generating surface. The flat surface includes a first portion contiguous with the front end face, and a second portion that is located farther from the front end face than is the first portion. The metal layer has an end face facing the first portion. The evanescent light generating surface faces the second portion.

摘要翻译： 近场光发生器包括波导管，等离子体激元发生器和金属层。 波导包括具有ev逝光产生表面的芯。 等离子体发生器包括基部和从基部朝向渐逝光产生表面突出的突出部分。 所述突出部具有：前端面，其位于与所述ev逝光生成面平行的方向的端部; 面向渐逝光产生表面的带状平坦表面; 以及连接到平坦表面的两个侧表面。 在突出部分的至少一部分中，两个侧表面之间的距离随着与渐消光产生表面的距离的增加而增加。 平坦表面包括与前端面相邻的第一部分，以及比第一部分更远离前端面的第二部分。 金属层具有面向第一部分的端面。 渐逝光产生表面面向第二部分。