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1. 发明授权

US07783139B2 Polarized light mode converter 有权
标题翻译：极化光模式转换器
公开(公告)号：US07783139B2
公开(公告)日：2010-08-24
申请号：US11886502
申请日：2006-03-07
申请人： Susumu Noda , Takashi Asano , Yoshinori Tanaka , Seiichi Takayama
发明人： Susumu Noda , Takashi Asano , Yoshinori Tanaka , Seiichi Takayama
IPC分类号： G02B6/00
CPC分类号： B82Y20/00 , G02B6/1225 , G02B6/126 , G02B6/14
摘要： The present invention provides a polarized light mode converter which can be provided within a two-dimensional photonic crystal or can be smoothly connected to a two-dimensional photonic crystal. In a two-dimensional photonic crystal made of a slab-like main body provided with a plurality of different refractive index regions (for example, holes 22) arranged in a lattice in the main body, where the different refractive index regions have a refractive index different from that of the main body, a polarized light conversion waveguide 23 is formed which is comprised of defects of the different refractive index regions arranged linearly whose a cross-sectional shape is asymmetrical in a vertical and in a horizontal direction. The polarized light conversion waveguide 23 can be, for example, realized by providing, on a side of the waveguide, holes 221 and 222 extending in a direction oblique to a the main body surface. TE polarized light propagating through the polarized light conversion waveguide 23 is partially converted into TM polarized light due to the asymmetry of the cross-sectional shape of the waveguide. Since the polarized light mode converter is made of a two-dimensional photonic crystal, it can be provided within a two-dimensional photonic crystal or can be smoothly connected to a two-dimensional photonic crystal.
摘要翻译：本发明提供一种可以设置在二维光子晶体内或者可以平滑地连接到二维光子晶体的偏振光模式转换器。在由板状主体构成的二维光子晶体中，其具有在主体中以格子排列的多个不同的折射率区域（例如，孔22），其中不同的折射率区域具有折射率与主体不同的是，形成偏振光转换波导23，该偏振光转换波导23由横截面形状在垂直方向和水平方向上不对称的直线布置的不同折射率区域的缺陷构成。例如，偏振光转换波导23可以通过在波导侧设置沿着与主体表面倾斜的方向延伸的孔221和222来实现。由于波导的横截面形状的不对称性，通过偏振光转换波导23传播的TE偏振光被部分地转换为TM偏振光。由于偏振光模式转换器由二维光子晶体制成，所以它可以设置在二维光子晶体内，或者可以平滑地连接到二维光子晶体。

2. 发明申请

US20090232441A1 Polarized Light Mode Converter 有权
标题翻译：极化光模式转换器
公开(公告)号：US20090232441A1
公开(公告)日：2009-09-17
申请号：US11886502
申请日：2006-03-07
申请人： Susumu Noda , Takashi Asano , Yoshinori Tanaka , Seiichi Takayama
发明人： Susumu Noda , Takashi Asano , Yoshinori Tanaka , Seiichi Takayama
IPC分类号： G02B6/00
CPC分类号： B82Y20/00 , G02B6/1225 , G02B6/126 , G02B6/14
摘要： The present invention provides a polarized light mode converter which can be provided within a two-dimensional photonic crystal or can be smoothly connected to a two-dimensional photonic crystal. In a two-dimensional photonic crystal made of a slab-like main body provided with a plurality of different refractive index regions (for example, holes 22) arranged in a lattice in the main body, where the different refractive index regions have a refractive index different from that of the main body, a polarized light conversion waveguide 23 is formed which is comprised of defects of the different refractive index regions arranged linearly whose a cross-sectional shape is asymmetrical in a vertical and in a horizontal direction. The polarized light conversion waveguide 23 can be, for example, realized by providing, on a side of the waveguide, holes 221 and 222 extending in a direction oblique to a the main body surface. TE polarized light propagating through the polarized light conversion waveguide 23 is partially converted into TM polarized light due to the asymmetry of the cross-sectional shape of the waveguide. Since the polarized light mode converter is made of a two-dimensional photonic crystal, it can be provided within a two-dimensional photonic crystal or can be smoothly connected to a two-dimensional photonic crystal.
摘要翻译：本发明提供一种可以设置在二维光子晶体内或者可以平滑地连接到二维光子晶体的偏振光模式转换器。在由板状主体构成的二维光子晶体中，其具有在主体中以格子排列的多个不同的折射率区域（例如，孔22），其中不同的折射率区域具有折射率与主体不同的是，形成偏振光转换波导23，该偏振光转换波导23由横截面形状在垂直方向和水平方向上不对称的直线布置的不同折射率区域的缺陷构成。例如，偏振光转换波导23可以通过在波导侧设置沿着与主体表面倾斜的方向延伸的孔221和222来实现。由于波导的横截面形状的不对称性，通过偏振光转换波导23传播的TE偏振光被部分地转换为TM偏振光。由于偏振光模式转换器由二维光子晶体制成，所以它可以设置在二维光子晶体内，或者可以平滑地连接到二维光子晶体。

3. 发明申请

US20090175572A1 Photonic crystal having heterostructure and optical device using the photonic crystal 有权
标题翻译：具有异质结构的光子晶体和使用光子晶体的光学器件
公开(公告)号：US20090175572A1
公开(公告)日：2009-07-09
申请号：US10584942
申请日：2005-03-24
申请人： Susumu Noda , Takashi Asano , Seiichi Takayama
发明人： Susumu Noda , Takashi Asano , Seiichi Takayama
IPC分类号： G02B6/12
CPC分类号： B82Y20/00 , G02B6/12004 , G02B6/1225
摘要： The present invention has been made for providing a photonic crystal capable of multiplexing or demultiplexing light within a wavelength band having a certain width. It includes a slab-shaped body 21 provided with plural forbidden band zones 211 and 212, and holes 221 and 222 having different sizes are arranged in the forbidden band zones with different cycles, respectively. Also formed are a trunk waveguide 24 extending along the direction inclined by +30 degrees from a perpendicular of the boundary 23 between the forbidden-band zones 211 and 212, and a branch waveguide 25 extending along the direction inclined by −30 degrees. A ray of light within the multiplexed/demultiplexed wavelength band, which is excluded from the transmission wavelength band of the trunk waveguide 24 in the forbidden band zone 212 and included in the transmission wavelength band of the trunk waveguide 24 in the forbidden band zone 211, is reflected by the boundary 23 and thereby demultiplexed from the trunk waveguide 24 into the branch waveguide 25. Thus, all the rays of light whose wavelengths are within the multiplexed/demultiplexed wavelength band having a certain width are demultiplexed into the branch waveguide 25. Therefore, even if the wavelength of the optical signal is deviated due to some error, the light can be demultiplexed. This is also true for the multiplexing operation.
摘要翻译：本发明是为了提供能够在具有一定宽度的波长带内复用或分离光的光子晶体。它包括设置有多个禁带区211和212的板状主体21，并且具有不同尺寸的孔221和222分别布置在不同周期的禁带区中。还形成有从沿禁带区211和212之间的边界23的垂直方向倾斜+30度的方向延伸的主干波导24和沿着倾斜-30度的方向延伸的分支波导25。在禁带区域212中被包含在主干波导24的传输波长带中的禁带区域211中从干线波导24的传输波长带排除的复用/解复用波长带内的光线，由边界23反射，从而从主干波导24分离成分支波导25.因此，波长在具有一定宽度的复用/解复用波长带内的所有光线被解复用到分支波导25中。因此即使光信号的波长由于一些误差而偏离，也可以将光解复用。这对于多路复用操作也是如此。

4. 发明授权

US07853111B2 Two-dimensional photonic crystal 有权
标题翻译：二维光子晶体
公开(公告)号：US07853111B2
公开(公告)日：2010-12-14
申请号：US10591299
申请日：2005-03-04
申请人： Susumu Noda , Takashi Asano , Seiichi Takayama , Hitoshi Kitagawa
发明人： Susumu Noda , Takashi Asano , Seiichi Takayama , Hitoshi Kitagawa
IPC分类号： G02B6/10
CPC分类号： B82Y20/00 , G02B6/1225 , G02B6/29325 , G02B6/2938
摘要： The present invention provides a two-dimensional photonic crystal in which an absolute photonic band gap (PBG), i.e. a photonic band gap that is effective for both the TE-polarized light and the TM-polarized light within a predetermined wavelength range, is created with an adequate bandwidth. The body 21 is provided with holes 22 arranged in a triangular lattice pattern, where the basic shape of the hole is an equilateral triangle. This shaping and arranging of the holes creates an absolute PBG. Each corner of the equilateral triangle is cut along an arc to leave an adequate distance between the neighboring holes (i.e. an adequate width of the connecting portion of the body). This design makes it possible to enlarge each hole 22 while ensuring an adequate strength of the two-dimensional photonic crystal. This construction creates an absolute PBG having a large width.
摘要翻译：本发明提供一种二维光子晶体，其中产生绝对光子带隙（PBG），即对预定波长范围内的TE偏振光和TM偏振光有效的光子带隙，具有足够的带宽。主体21设置有以三角形格子图案布置的孔22，其中孔的基本形状为等边三角形。这种孔的形成和排列创建了绝对的PBG。等边三角形的每个角都沿弧线切割，以在相邻的孔之间留下足够的距离（即，身体的连接部分的适当宽度）。该设计使得可以在确保二维光子晶体的足够强度的同时放大每个孔22。这种结构创建了宽度大的绝对PBG。

5. 发明授权

US07738749B2 Photonic crystal having heterostructure and optical device using the photonic crystal 有权
标题翻译：具有异质结构的光子晶体和使用光子晶体的光学器件
公开(公告)号：US07738749B2
公开(公告)日：2010-06-15
申请号：US10584942
申请日：2005-03-24
申请人： Susumu Noda , Takashi Asano , Seiichi Takayama
发明人： Susumu Noda , Takashi Asano , Seiichi Takayama
IPC分类号： G02B6/28 , G02B6/26 , G02B6/42 , G02B6/032
CPC分类号： B82Y20/00 , G02B6/12004 , G02B6/1225
摘要： The present invention has been made for providing a photonic crystal capable of multiplexing or demultiplexing light within a wavelength band having a certain width. It includes a slab-shaped body 21 provided with plural forbidden band zones 211 and 212, and holes 221 and 222 having different sizes are arranged in the forbidden band zones with different cycles, respectively. Also formed are a trunk waveguide 24 extending along the direction inclined by +30 degrees from a perpendicular of the boundary 23 between the forbidden band zones 211 and 212, and a branch waveguide 25 extending along the direction inclined by −30 degrees. A ray of light within the multiplexed/demultiplexed wavelength band, which is excluded from the transmission wavelength band of the trunk waveguide 24 in the forbidden band zone 212 and included in the transmission wavelength band of the trunk waveguide 24 in the forbidden band zone 211, is reflected by the boundary 23 and thereby demultiplexed from the trunk waveguide 24 into the branch waveguide 25. Thus, all the rays of light whose wavelengths are within the multiplexed/demultiplexed wavelength band having a certain width are demultiplexed into the branch waveguide 25. Therefore, even if the wavelength of the optical signal is deviated due to some error, the light can be demultiplexed. This is also true for the multiplexing operation.
摘要翻译：本发明是为了提供能够在具有一定宽度的波长带内复用或分离光的光子晶体。它包括设置有多个禁带区211和212的板状主体21，并且具有不同尺寸的孔221和222分别布置在不同周期的禁带区中。还形成有沿着从禁带区211和212之间的边界23的垂直方向倾斜±30度的方向延伸的主干波导24和沿着倾斜-30度的方向延伸的分支波导25。在禁带区域212中被包含在主干波导24的传输波长带中的禁带区域211中从干线波导24的传输波长带排除的复用/解复用波长带内的光线，由边界23反射，从而从主干波导24分离成分支波导25.因此，波长在具有一定宽度的复用/解复用波长带内的所有光线被解复用到分支波导25中。因此即使光信号的波长由于一些误差而偏离，也可以将光解复用。这对于多路复用操作也是如此。

6. 发明授权

US07711228B2 Two-dimensional photonic crystal and optical device using the crystal 有权
标题翻译：二维光子晶体和使用晶体的光学器件
公开(公告)号：US07711228B2
公开(公告)日：2010-05-04
申请号：US11661232
申请日：2005-08-30
申请人： Susumu Noda , Takashi Asano , Hitoshi Kitagawa , Seiichi Takayama
发明人： Susumu Noda , Takashi Asano , Hitoshi Kitagawa , Seiichi Takayama
IPC分类号： G02B6/10
CPC分类号： G02B6/1225 , B82Y20/00
摘要： The present invention intends to provide a two-dimensional photonic crystal having a wide photonic band gap (PBG). In a slab-shaped body 31, a number of holes 32, whose sectional shape on a plane parallel to the slab surface is an equilateral triangle, are periodically arranged in a triangular lattice pattern. The upper and lower sides of the holes 32 are covered with the material of the body 31. The aforementioned sectional shape is uneven along the direction perpendicular to the slab surface. This construction expands the PBG for TM-polarized light and thereby increases its energy region overlapping with the PBG for TE-polarized light. This overlapping section is the complete PBG. If a ray of light whose wavelength corresponds to an energy level within the complete PBG, neither the TE-polarized nor TM-polarized component of the light can be propagated through the photonic crystal. Therefore, even if a waveguide and/or a resonator is provided in the photonic crystal, the light having the aforementioned wavelength will never leak from the waveguide or resonator into the photonic crystal.
摘要翻译：本发明旨在提供具有宽光子带隙（PBG）的二维光子晶体。在板状主体31中，在与平板面平行的平面上的截面形状为等边三角形的多个孔32周期性地排列成三角形格子状。孔32的上侧和下侧被主体31的材料覆盖。上述截面形状沿着与板坯表面垂直的方向不均匀。这种结构扩展了TM偏振光的PBG，从而增加了其与TE偏振光的PBG重叠的能量区域。这个重叠部分是完整的PBG。如果其波长对应于完整PBG内的能级的光线，则光的TE偏振和TM偏振分量都不能通过光子晶体传播。因此，即使在光子晶体中设置波导和/或谐振器，具有上述波长的光也不会从波导或谐振器泄漏到光子晶体中。

7. 发明申请

US20080013902A1 Two-Dimensional Photonic Crystal and Optical Device Using the Crystal 有权
标题翻译：二维光子晶体和使用晶体的光学器件
公开(公告)号：US20080013902A1
公开(公告)日：2008-01-17
申请号：US11661232
申请日：2005-08-30
申请人： Susumu Noda , Takashi Asano , Hitoshi Kitagawa , Seiichi Takayama
发明人： Susumu Noda , Takashi Asano , Hitoshi Kitagawa , Seiichi Takayama
IPC分类号： G02B6/02 , G02B6/10
CPC分类号： G02B6/1225 , B82Y20/00
摘要： The present invention intends to provide a two-dimensional photonic crystal having a wide photonic band gap (PBG). In a slab-shaped body 31, a number of holes 32, whose sectional shape on a plane parallel to the slab surface is an equilateral triangle, are periodically arranged in a triangular lattice pattern. The upper and lower sides of the holes 32 are covered with the material of the body 31. The aforementioned sectional shape is uneven along the direction perpendicular to the slab surface. This construction expands the PBG for TM-polarized light and thereby increases its energy region overlapping with the PBG for TE-polarized light. This overlapping section is the complete PBG. If a ray of light whose wavelength corresponds to an energy level within the complete PBG, neither the TE-polarized nor TM-polarized component of the light can be propagated through the photonic crystal. Therefore, even if a waveguide and/or a resonator is provided in the photonic crystal, the light having the aforementioned wavelength will never leak from the waveguide or resonator into the photonic crystal.
摘要翻译：本发明旨在提供具有宽光子带隙（PBG）的二维光子晶体。在板状主体31中，在与平板面平行的平面上的截面形状为等边三角形的多个孔32周期性地排列成三角形格子状。孔32的上侧和下侧被主体31的材料覆盖。上述截面形状沿与板坯表面垂直的方向不均匀。这种结构扩展了TM偏振光的PBG，从而增加了其与TE偏振光的PBG重叠的能量区域。这个重叠部分是完整的PBG。如果其波长对应于完整PBG内的能级的光线，则光的TE偏振和TM偏振分量都不能通过光子晶体传播。因此，即使在光子晶体中设置波导和/或谐振器，具有上述波长的光也不会从波导或谐振器泄漏到光子晶体中。

8. 发明授权

US07428352B2 Two-dimensional photonic crystal and optical function element using the same 有权
标题翻译：二维光子晶体和光学功能元件使用相同
公开(公告)号：US07428352B2
公开(公告)日：2008-09-23
申请号：US11794121
申请日：2005-12-28
申请人： Susumu Noda , Takashi Asano , Bong-Shik Song , Seiichi Takayama
发明人： Susumu Noda , Takashi Asano , Bong-Shik Song , Seiichi Takayama
IPC分类号： G02B6/26 , G02B6/42 , G02B6/10
CPC分类号： G02F1/313 , B82Y20/00 , G02B6/1225 , G02F2202/32
摘要： An object of the present invention is to provide a two-dimensional photonic crystal which can be used for optical path changeover switches or the like to allow switching of a path. A first area 121 and a second area 122 provided with holes 131 and 132 having a difference in the period and size are created on a body 11, and a main waveguide 15 is formed to obliquely cross a boundary 14 between these areas. A branch waveguide 17 branched from the main waveguide 15 into the first area 121 side is also formed by using a crossing point between the main waveguide 15 and the boundary 14 as a starting point. The second area 122 is heated to change a refractive index of the body within the area, so that a frequency band which can be passed through the main waveguide 15 of the second area 122 is changed. Light having a specific frequency and propagated through the main waveguide 15 from the first area 121 side is switched to be extracted from the main waveguide 15 on the second area 122 side or to be extracted from the branch waveguide 17 without propagating the main waveguide 15 on the second area 122, in response to whether or not the heating is performed.
摘要翻译：本发明的目的是提供一种二维光子晶体，其可以用于光路切换开关等，以允许路径的切换。在主体11上形成有具有周期和尺寸差异的孔131和132的第一区域121和第二区域122，并且主波导15形成为跨越这些区域之间的边界14。从主波导15分支到第一区域121侧的分支波导管17也通过以主波导15和边界14之间的交叉点为起点形成。第二区域122被加热以改变该区域内的物体的折射率，使得能够通过第二区域122的主波导15的频带发生变化。具有特定频率并且从第一区域121侧通过主波导15传播的光被切换为从第二区域122侧的主波导15中提取或者从分支波导17提取而不将主波导15传播响应于是否执行加热，第二区域122。

9. 发明申请

US20080112679A1 Two-Dimensional Photonic Crystal 有权
标题翻译：二维光子晶体
公开(公告)号：US20080112679A1
公开(公告)日：2008-05-15
申请号：US11795991
申请日：2006-01-31
申请人： Susumu Noda , Takashi Asano , Seiichi Takayama , Ranko Hatsuda
发明人： Susumu Noda , Takashi Asano , Seiichi Takayama , Ranko Hatsuda
IPC分类号： G02B6/10
CPC分类号： B82Y20/00 , G02B6/1225
摘要： An objective of the present invention is to provide a two-dimensional photonic crystal in which a complete photonic band gap (PBG), i.e. a photonic band gap that is effective for both a TE-polarized light and a TM-polarized light within a predetermined wavelength range, is created and an adequate width of the complete PBG can be ensured. A slab-shaped body 21 consisting of a birefringent material is provided with holes 22 periodically arranged in a triangular lattice pattern, where a plane shape of the hole is an equilateral triangle. The PBG for the TE-polarized light and the PBG for the TM-polarized light can be independently set by adjusting anisotropy in the refractive index of the body 21, i.e. a refractive index in a direction vertical to the body 21 and a refractive index in a direction parallel to the body 21. This construction makes it possible to ensure an adequate width of the complete PBG.
摘要翻译：本发明的目的是提供一种二维光子晶体，其中完整的光子带隙（PBG），即对预定的TE偏振光和TM偏振光两者都有效的光子带隙波长范围，并且可以确保完整PBG的足够宽度。由双折射材料构成的板状体21设置有以三角形格子图案周期性排列的孔22，孔的平面形状为等边三角形。用于TE偏振光的PBG和用于TM偏振光的PBG可以通过调节主体21的折射率的各向异性，即垂直于主体21的方向上的折射率和折射率，独立地设定平行于主体21的方向。这种结构使得可以确保完整的PBG的宽度。

10. 发明授权

US07912335B2 Two-dimensional photonic crystal and optical device using the same 有权
标题翻译：二维光子晶体和光学器件使用相同
公开(公告)号：US07912335B2
公开(公告)日：2011-03-22
申请号：US11794192
申请日：2005-12-28
申请人： Susumu Noda , Takashi Asano , Seiichi Takayama
发明人： Susumu Noda , Takashi Asano , Seiichi Takayama
IPC分类号： G02B6/10
CPC分类号： B82Y20/00 , G02B6/12007 , G02B6/1225
摘要： An object of the present invention is to provide a two-dimensional photonic crystal in which conditions for both the TE-polarized light and the TM-polarized light can be easily satisfied. A body includes a first area having a triangular lattice pattern arrangement of a circular hole and a second area having a triangular lattice pattern arrangement of an equilateral triangular holes. Therefore, the TE-PBG which is a photonic band gap (PBG) for the TE-polarized light is created in the first area, and the TM-PBG which is a PBG for the TM-polarized light is created in the second area. Parameters such as the period and size of the holes can be independently set for the first area and the second area, so that an energy region common to the TE-PBG and the TM-PBG (i.e. absolute PBG) can be made larger and easily created. Forming a waveguide and resonators and or the like corresponding to an energy within the absolute PBG allows formation of a polarized light multiplexer/demultiplexer and a frequency (wavelength) multiplexer/demultiplexer without depending on polarized light or the like.
摘要翻译：本发明的目的是提供二维光子晶体，其中可以容易地满足TE偏振光和TM偏振光两者的条件。主体包括具有圆形孔的三角形格子图案布置的第一区域和具有等边三角形孔的三角形格子图案布置的第二区域。因此，在第一区域中产生作为TE偏振光的光子带隙（PBG）的TE-PBG，在第二区域中产生作为TM偏振光的PBG的TM-PBG。诸如孔的周期和尺寸的参数可以独立地设置为第一区域和第二区域，使得TE-PBG和TM-PBG（即绝对PBG）共有的能量区域可以变得更大和容易创建。对应于绝对PBG内的能量的波导和谐振器等形成偏振光多路复用器/解复用器和频率（波长）复用器/解复用器，而不依赖于偏振光等。

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