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    Two-dimensional photonic crystal surface emitting laser
    1.
    发明授权
    Two-dimensional photonic crystal surface emitting laser 有权
    二维光子晶体表面发射激光器

    公开(公告)号：US07639720B2

    公开(公告)日：2009-12-29

    申请号：US12076939

    申请日：2008-03-25

    申请人： Susumu Noda ,  Jun-ichi Kashiwagi ,  Dai Ohnishi ,  Wataru Kunishi

    发明人： Susumu Noda ,  Jun-ichi Kashiwagi ,  Dai Ohnishi ,  Wataru Kunishi

    IPC分类号： H01S5/00 ,  H01S3/08

    CPC分类号： H01S5/105 ,  B82Y20/00 ,  H01S5/028 ,  H01S5/0425 ,  H01S5/183 ,  H01S5/2027 ,  H01S5/34306

    摘要： The two-dimensional photonic crystal surface emitting laser according to the present invention includes a semiconductor substrate, a main laser section and a reflection film. The main laser section includes a lower cladding layer, an active layer, a two-dimensional photonic crystal layer, an upper cladding layer and a contact layer, which are all deposited on the semiconductor substrate. The reflection film, which surrounds the entire side surfaces of the main laser section, is made of a thin titanium-gold film deposited by sputtering.

    摘要翻译： 根据本发明的二维光子晶体表面发射激光器包括半导体衬底，主激光部分和反射膜。 主激光部分包括全部沉积在半导体衬底上的下包层，有源层，二维光子晶体层，上覆层和接触层。 围绕主激光部分的整个侧表面的反射膜由通过溅射沉积的薄钛金膜制成。

    Two-dimensional photonic crystal surface-emitting laser
    2.
    发明申请
    Two-dimensional photonic crystal surface-emitting laser 有权
    二维光子晶体表面发射激光器

    公开(公告)号：US20080240193A1

    公开(公告)日：2008-10-02

    申请号：US12076939

    申请日：2008-03-25

    申请人： Susumu Noda ,  Jun-ichi Kashiwagi ,  Dai Ohnishi ,  Wataru Kunishi

    发明人： Susumu Noda ,  Jun-ichi Kashiwagi ,  Dai Ohnishi ,  Wataru Kunishi

    IPC分类号： H01S5/00

    CPC分类号： H01S5/105 ,  B82Y20/00 ,  H01S5/028 ,  H01S5/0425 ,  H01S5/183 ,  H01S5/2027 ,  H01S5/34306

    摘要： The two-dimensional photonic crystal surface emitting laser according to the present invention includes a semiconductor substrate, a main laser section and a reflection film. The main laser section includes a lower cladding layer, an active layer, a two-dimensional photonic crystal layer, an upper cladding layer and a contact layer, which are all deposited on the semiconductor substrate. The reflection film, which surrounds the entire side surfaces of the main laser section, is made of a thin titanium-gold film deposited by sputtering.

    摘要翻译： 根据本发明的二维光子晶体表面发射激光器包括半导体衬底，主激光部分和反射膜。 主激光部分包括全部沉积在半导体衬底上的下包层，有源层，二维光子晶体层，上覆层和接触层。 围绕主激光部分的整个侧表面的反射膜由通过溅射沉积的薄钛金膜制成。

    Two-Dimensional Photonic Crystal Surface Emitting Laser Light Source
    4.
    发明申请
    Two-Dimensional Photonic Crystal Surface Emitting Laser Light Source 有权
    二维光子晶体表面发射激光光源

    公开(公告)号：US20090285255A1

    公开(公告)日：2009-11-19

    申请号：US12225194

    申请日：2007-03-20

    申请人： Kyosuke Sakai ,  Eiji Miyai ,  Susumu Noda ,  Dai Ohnishi ,  Wataru Kunishi

    发明人： Kyosuke Sakai ,  Eiji Miyai ,  Susumu Noda ,  Dai Ohnishi ,  Wataru Kunishi

    IPC分类号： H01S5/183

    CPC分类号： H01S5/18 ,  B82Y20/00 ,  G11B7/127 ,  H01S5/0425 ,  H01S5/105 ,  H01S5/125 ,  H01S5/2027 ,  H01S5/34313 ,  H01S2301/14 ,  H01S2301/18

    摘要： An objective of the present invention is to provide a surface emitting laser capable of selectively generating a laser oscillation in the fundamental mode and thereby emitting a single-wavelength laser light. In a surface emitting laser including an active layer and a two-dimensional photonic crystal provided on one side of the active layer, a reflector 45 or 46 is provided at least at a portion of the circumference of the two-dimensional photonic crystal. The reflector has a reflectance distribution in which the reflectance has a maximum value at a position where the amplitude envelope of the fundamental mode of an internal resonance light created within the two-dimensional photonic crystal. This design strengthens the fundamental mode while suppressing the second mode, thus enabling the laser oscillation in the fundamental mode to be selectively obtained, so that a single-wavelength laser light can be emitted.

    摘要翻译： 本发明的目的是提供一种能够选择性地在基模中产生激光振荡并从而发射单波长激光的表面发射激光器。 在包括有源层和设置在有源层的一侧的二维光子晶体的表面发射激光器中，至少在二维光子晶体的圆周的一部分处提供反射器45或46。 反射器具有反射率分布，其中反射率在二维光子晶体内产生的内部共振光的基模的幅度包络的位置处具有最大值。 该设计在抑制第二模式的同时加强基本模式，从而能够选择性地获得基模中的激光振荡，从而可以发射单波长激光。

    Two-dimensional photonic crystal laser
    5.
    发明授权
    Two-dimensional photonic crystal laser 有权
    二维光子晶体激光器

    公开(公告)号：US08300672B2

    公开(公告)日：2012-10-30

    申请号：US13061337

    申请日：2009-08-18

    申请人： Susumu Noda ,  Seita Iwahashi ,  Yoshitaka Kurosaka ,  Kyosuke Sakai ,  Eiji Miyai ,  Dai Ohnishi ,  Wataru Kunishi

    发明人： Susumu Noda ,  Seita Iwahashi ,  Yoshitaka Kurosaka ,  Kyosuke Sakai ,  Eiji Miyai ,  Dai Ohnishi ,  Wataru Kunishi

    IPC分类号： H01S5/00

    CPC分类号： H01S5/18 ,  H01S5/105 ,  H01S5/187

    摘要： A two-dimensional photonic crystal laser light is provided. The two-dimensional photonic crystal laser includes a two-dimensional photonic crystal made of a plate-shaped member provided with a periodic arrangement of identically-shaped modified refractive index areas having a refractive index different from that of the plate-shaped member; and an active layer provided on one side of the two-dimensional photonic crystal. The modified refractive index areas are arranged at lattice points of a lattice with a same period at least in two directions; each modified refractive index area is shaped so that a feedback strength is different with respect to directions of two primitive lattice vectors of the lattice; the two-dimensional photonic crystal has a periodic structure of a supercell, which contains a plurality of lattice points; and the sum of the feedback strengths by all modified refractive index areas in the supercell is identical in each direction of the two primitive lattice vectors.

    摘要翻译： 提供二维光子晶体激光。 二维光子晶体激光器包括由板状构件制成的二维光子晶体，该二维光子晶体具有折射率不同于板状构件的相同形状的改性折射率区域的周期性布置; 以及设置在二维光子晶体的一侧上的有源层。 修饰的折射率区域至少在两个方向上布置在具有相同周期的格子的格子点处; 每个修改的折射率区域被成形为使得反馈强度相对于晶格的两个原始晶格矢量的方向是不同的; 二维光子晶体具有包含多个格点的超单元的周期性结构; 并且超级单元中的所有修改的折射率区域的反馈强度的总和在两个原始格子向量的每个方向上是相同的。

    TWO-DIMENSIONAL PHOTONIC CRYSTAL LASER
    6.
    发明申请
    TWO-DIMENSIONAL PHOTONIC CRYSTAL LASER 有权
    二维光子晶体激光

    公开(公告)号：US20110188526A1

    公开(公告)日：2011-08-04

    申请号：US13061337

    申请日：2009-08-18

    申请人： Susumu Noda ,  Seita Iwahashi ,  Yoshitaka Kurosaka ,  Kyosuke Sakai ,  Eiji Miyai ,  Dai Ohnishi ,  Wataru Kunishi

    发明人： Susumu Noda ,  Seita Iwahashi ,  Yoshitaka Kurosaka ,  Kyosuke Sakai ,  Eiji Miyai ,  Dai Ohnishi ,  Wataru Kunishi

    IPC分类号： H01S3/16

    CPC分类号： H01S5/18 ,  H01S5/105 ,  H01S5/187

    摘要： A two-dimensional photonic crystal laser light is provided. The two-dimensional photonic crystal laser includes a two-dimensional photonic crystal made of a plate-shaped member provided with a periodic arrangement of identically-shaped modified refractive index areas having a refractive index different from that of the plate-shaped member; and an active layer provided on one side of the two-dimensional photonic crystal. The modified refractive index areas are arranged at lattice points of a lattice with a same period at least in two directions; each modified refractive index area is shaped so that a feedback strength is different with respect to directions of two primitive lattice vectors of the lattice; the two-dimensional photonic crystal has a periodic structure of a supercell, which contains a plurality of lattice points; and the sum of the feedback strengths by all modified refractive index areas in the supercell is identical in each direction of the two primitive lattice vectors.

    摘要翻译： 提供二维光子晶体激光。 二维光子晶体激光器包括由板状构件制成的二维光子晶体，该二维光子晶体具有折射率不同于板状构件的相同形状的改性折射率区域的周期性布置; 以及设置在二维光子晶体的一侧上的有源层。 修饰的折射率区域至少在两个方向上布置在具有相同周期的格子的格子点处; 每个修改的折射率区域被成形为使得反馈强度相对于晶格的两个原始晶格矢量的方向是不同的; 二维光子晶体具有包含多个格点的超单元的周期性结构; 并且超级单元中的所有修改的折射率区域的反馈强度的总和在两个原始格子向量的每个方向上是相同的。

    Two-Dimensional Photonic Crystal Surface Emitting Laser Light Source
    7.
    发明申请
    Two-Dimensional Photonic Crystal Surface Emitting Laser Light Source 有权
    二维光子晶体表面发射激光光源

    公开(公告)号：US20090175304A1

    公开(公告)日：2009-07-09

    申请号：US12225530

    申请日：2007-03-30

    申请人： Susumu Noda ,  Yoshitaka Kurosaka ,  Eiji Miyai ,  Dai Ohnishi ,  Wataru Kunishi

    发明人： Susumu Noda ,  Yoshitaka Kurosaka ,  Eiji Miyai ,  Dai Ohnishi ,  Wataru Kunishi

    IPC分类号： H01S5/00

    CPC分类号： H01S5/183 ,  H01S5/105

    摘要： A two-dimensional photonic crystal surface emitting laser light source according to the present invention includes a two-dimensional photonic crystal made of a plate-shaped body material provided with a periodic arrangement of identically-shaped holes 242A and an active layer provided on one side of the two-dimensional photonic crystal. The hole 242A is not located on a first half-line 251 extending from the gravity center G1 of the hole in a direction within the plane of the two-dimensional photonic crystal, while the hole 242A is located at least on a portion of a second half-line 252 extending from the gravity center G1 in the direction opposite to the first half-line 251. Injecting electric charges into the active layer generates light, which creates an electric field that encircles the gravity center G1 within the two-dimensional photonic crystal. For a given point on the second half-line 252 at which the hole 242A is located, there is no hole at a point that is symmetrical to the aforementioned point with respect to the gravity center G1, so that there is a difference in the refractive index between the two points. Thus, the electric field vectors at the two points are prevented from canceling each other due to destructive interference, so that the resultant laser light is stronger than conventional examples.

    摘要翻译： 根据本发明的二维光子晶体表面发射激光光源包括由板状主体材料制成的二维光子晶体，该二维光子晶体设置有相同形状的孔242A和设置在一侧的活性层的周期性排列 的二维光子晶体。 孔242A不位于从二维光子晶体的平面内的孔的重心G1延伸的第一半线251上，而孔242A至少位于二次光子晶体的一部分上 从重心G1向与第一半线251相反的方向延伸的半线252.向有源层注入电荷产生光，其产生围绕二维光子晶体内的重心G1的电场 。 对于孔242A所在的第二半线252上的给定点，在相对于重心G1与上述点对称的点处没有孔，使得折射率 两点之间的指标。 因此，由于相消干涉，防止两点处的电场矢量彼此抵消，使得所得到的激光比传统例子更强。

    Two-Dimensional Photonic Crystal Surface Emitting Laser
    8.
    发明申请
    Two-Dimensional Photonic Crystal Surface Emitting Laser 审中-公开
    二维光子晶体表面发射激光器

    公开(公告)号：US20090135871A1

    公开(公告)日：2009-05-28

    申请号：US12225169

    申请日：2007-03-20

    申请人： Susumu Noda ,  Eiji Miyai ,  Kyosuke Sakai ,  Dai Ohnishi ,  Wataru Kunishi

    发明人： Susumu Noda ,  Eiji Miyai ,  Kyosuke Sakai ,  Dai Ohnishi ,  Wataru Kunishi

    IPC分类号： H01S5/18

    CPC分类号： H01S5/18355 ,  G11B7/127 ,  H01S5/026 ,  H01S5/105

    摘要： An objective of the present invention is to provide a laser capable of producing a radially polarized laser beam with an annular cross section. A laser oscillator 60 including an active layer 53 and two-dimensional photonic crystal 55 with circular holes 552 arranged in a square lattice pattern is provided between two electrodes 571 and 572. A first polarization control layer 581, which functions as a half-wave plate, and a second polarization control layer 582, which functions as a half-wave plate with a fast axis 592 extending at an angle of 45° to that of the first polarization control layer 581, are located on the laser oscillator 60. When a voltage is applied between the electrodes, a circumferentially polarized annular laser beam is emitted from the laser oscillator 60. When passing through the first polarization control layer 581 and the second polarization control layer 582, the laser beam is converted to a radially polarized beam. The resultant laser beam can be converged by a focusing lens to achieve a diameter smaller than the diffraction limit. Such a narrow beam is suitable for an optical pickup or many other devices.

    摘要翻译： 本发明的目的是提供一种能够制造具有环形横截面的径向偏振激光束的激光器。 在两个电极571和572之间设置包括活性层53和具有以正方形格子图案排列的圆形孔552的二维光子晶体55的激光振荡器60.第一偏振控制层581用作半波片 ，并且作为半波片的第二偏光控制层582位于激光振荡器60上，该半波片具有与第一偏振控制层581成45°角延伸的快轴592。 施加在电极之间，从激光振荡器60发射周向极化的环形激光束。当通过第一偏振控制层581和第二偏振控制层582时，将激光束转换成径向偏振光束。 所得到的激光束可以被聚焦透镜会聚，以获得小于衍射极限的直径。 这种窄光束适用于光学拾取器或许多其他装置。

    Photonic crystal laser
    9.
    发明申请
    Photonic crystal laser 有权
    光子晶体激光器

    公开(公告)号：US20090074024A1

    公开(公告)日：2009-03-19

    申请号：US12230494

    申请日：2008-08-29

    申请人： Susumu Noda ,  Yoshitaka Kurosaka ,  Kyosuke Sakai ,  Eiji Miyai ,  Dai Ohnishi ,  Wataru Kunishi

    发明人： Susumu Noda ,  Yoshitaka Kurosaka ,  Kyosuke Sakai ,  Eiji Miyai ,  Dai Ohnishi ,  Wataru Kunishi

    IPC分类号： H01S5/026

    CPC分类号： H01S5/10 ,  G02B2006/1213 ,  G11B7/0903 ,  G11B7/127 ,  H01S5/105 ,  H01S5/1215 ,  H01S5/1231

    摘要： A laser capable of emitting multiple laser beams is provided. A two-dimensional photonic crystal laser according to the present invention has a laminated structure including an active layer, a first photonic crystal layer having a periodic distribution of refractive index with a first period, and a second photonic crystal layer having a periodic distribution of refractive index with a second period that differs from the first period. This two-dimensional photonic crystal laser can emit a main beam traveling in a direction perpendicular to the two-dimensional photonic crystals and side beams each traveling in a direction inclined with respect to the main beam. These beams can be used, for example, in a recording/reproducing device by means of an optical disk, the main beam being used for recording/reproducing information and the side beams for following up the track.

    摘要翻译： 提供了能够发射多个激光束的激光器。 根据本发明的二维光子晶体激光器具有叠层结构，其包括有源层，具有第一周期的折射率的周期性分布的第一光子晶体层和具有折射率的周期性分布的第二光子晶体层 第二期的指数与第一期不同。 该二维光子晶体激光器可以发射在垂直于二维光子晶体的方向上行进的主光束和每个沿相对于主光束倾斜的方向行进的侧光束。 这些光束例如可以通过光盘用于记录/再现装置中，主光束用于记录/再现信息，并且侧光束用于跟踪轨道。