公开(公告)号：US20110122737A1

公开(公告)日：2011-05-26

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 ,  G11B5/02 ,  G11B5/48

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：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：US07821732B2

公开(公告)日：2010-10-26

申请号：US12237810

申请日：2008-09-25

申请人： Eiji Komura ,  Seiichi Takayama ,  Satoshi Tomikawa ,  Kosuke Tanaka ,  Koji Shimazawa

发明人： Eiji Komura ,  Seiichi Takayama ,  Satoshi Tomikawa ,  Kosuke Tanaka ,  Koji Shimazawa

IPC分类号： G11B5/02

CPC分类号： G11B5/314 ,  G11B5/4866 ,  G11B2005/001 ,  G11B2005/0021

摘要： A thermally assisted magnetic head according to the present invention includes: a medium-facing surface, a main magnetic pole provided on the medium-facing surface, and a plasmon antenna provided on the medium-facing surface in the vicinity of the main magnetic pole, wherein the plasmon antenna is shaped as a triangular flat plate having first, second and third corners, such that the distance from the first corner to the main magnetic pole is shorter than the distance from the second corner to the main magnetic pole and the distance from the third corner to the main magnetic pole, and the interior angle α of the first corner, the interior angle β of the second corner and the interior angle γ of the third corner satisfy relationships α

公开(公告)号：US08369203B2

公开(公告)日：2013-02-05

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： G11B7/00

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。

公开(公告)号：US08335052B2

公开(公告)日：2012-12-18

申请号：US12237767

申请日：2008-09-25

申请人： Seiichi Takayama ,  Eiji Komura ,  Yasuhiro Ito ,  Kosuke Tanaka ,  Koji Shimazawa

发明人： Seiichi Takayama ,  Eiji Komura ,  Yasuhiro Ito ,  Kosuke Tanaka ,  Koji Shimazawa

IPC分类号： G11B5/127

CPC分类号： G11B5/314 ,  G11B5/4866 ,  G11B2005/001 ,  G11B2005/0021

摘要： A plasmon antenna of the present invention is used in a thermally assisted magnetic head that includes: a medium-facing surface set, parallel to an XY plane; a magnetic pole for writing, extending toward the medium-facing surface, and a plasmon antenna comprising a pair of small metal bodies irradiated with excitation light for near-field light generation propagating in a Z-axis direction. Respective corners of the small metal bodies are spaced apart opposite each other along a TE mode direction of the excitation light. A distance between the corners gives the shortest distance between the small metal bodies, and a distance from each corner to the leading end of the magnetic pole gives a shortest distance from the small metal bodies to the leading end.

摘要翻译： 本发明的等离子体天线用于热辅助磁头，其包括：平行于XY平面的面向中间的表面组; 用于写入的磁极，朝向介质中的表面延伸;以及等离子体激元，其包括用激励光照射的一对小的金属体，用于沿Z轴方向传播的近场光产生。 小金属体的各个角部沿着激发光的TE模式方向相互间隔开。 拐角之间的距离给出了小金属体之间的最短距离，从磁极的每个拐角到前端的距离从小金属体到前端都具有最短的距离。

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：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：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。

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。