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20 条记录 (耗时 0.013 秒)

    Optical reflector structure, device, method of fabrication, and communications method
    1.
    发明授权
    Optical reflector structure, device, method of fabrication, and communications method 失效
    光反射器结构，器件，制造方法和通信方法

    公开(公告)号：US5172267A

    公开(公告)日：1992-12-15

    申请号：US633405

    申请日：1990-12-21

    申请人： Eli Yablonovitch

    发明人： Eli Yablonovitch

    IPC分类号： G02B5/08 ,  G02B6/122 ,  H01S5/183

    CPC分类号： B82Y20/00 ,  G02B5/08 ,  G02B6/1225 ,  H01S5/18361 ,  Y10S359/90

    摘要： An omnidirectional optical reflector structure (41, 52, 61) is made by forming a plurality of holes in a solid body (11) so as to result in a face-centered cubic lattice. Conventiently, the desired structure can be made by three successive steps of microfabrication, e.g., in the presence of a mask layer (12). Preferred reflector structures can be used, e.g., as external mirrors as filters, and as cavity materials of communications lasers with improved signal-to-noise ratio.

    摘要翻译： 通过在固体（11）中形成多个孔来制造全向光学反射器结构（41,42,61），以产生面心立方晶格。 有利地，可以通过微加工的三个连续步骤，例如在掩模层（12）的存在下进行所需的结构。 可以使用优选的反射器结构，例如作为过滤器的外部反射镜，以及具有改善的信噪比的通信激光器的腔体材料。

    Short laser pulse generation by gas breakdown switching and highly selective spectral filtering
    2.
    发明授权
    Short laser pulse generation by gas breakdown switching and highly selective spectral filtering 失效
    通过气体击穿切换和高选择性光谱过滤产生短脉冲

    公开(公告)号：US3979694A

    公开(公告)日：1976-09-07

    申请号：US485361

    申请日：1974-07-03

    申请人： Julius Goldhar ,  Eli Yablonovitch

    发明人： Julius Goldhar ,  Eli Yablonovitch

    IPC分类号： G01J3/00 ,  G01J3/18 ,  H01S3/00 ,  H01S3/23 ,  H05H1/22 ,  H01S3/101

    CPC分类号： G01J3/18 ,  G21B1/23 ,  H01S3/0057 ,  H01S3/073 ,  G01J3/0229

    摘要： In a laser pulse generator, short pulses adjustable in the range between about 0.1 and 0.5 nanoseconds are produced by improved spectral filtering of the output of a gas breakdown switch. The spectral filter in one embodiment is a hot, linearly absorbing gas cell that passes both sidebands of the radiation producing the gas breakdown in the switch and that linearly absorbs the center frequency. A second embodiment uses a tandem dual-slit monochromator as the spectral filter in order to pass both sidebands. The hot gas cell is simpler, cheaper and characterized by a higher rejection ratio than any other alternative to date. It yields very clean pulses with a steeper leading edge than prior techniques. The leading edge is highly reproducible, as needed for nuclear fusion work. The advantage over prior pulsed CO.sub.2 lasers for nuclear fusion work is substantial, since those prior lasers have not achieved pulse durations less than one nanosecond.

    摘要翻译： 在激光脉冲发生器中，通过对气体击穿开关的输出进行改进的频谱滤波来产生可在约0.1和0.5纳秒之间范围内调节的短脉冲。 一个实施例中的光谱滤波器是热的线性吸收气室，其通过辐射的两个边带，产生开关中的气体击穿并且线性吸收中心频率。 第二实施例使用串联双缝单色仪作为频谱滤波器，以通过两个边带。 热气单元比迄今为止任何其他替代方案更简单，便宜并且具有更高的抑制率。 它产生非常干净的脉冲，具有比现有技术更陡的前沿。 根据核聚变工作的需要，前沿是高度可重复的。 与现有的用于核聚变工作的脉冲二氧化碳激光器相比，优点在于现有的激光器未达到小于1纳秒的脉冲持续时间。

    Magnetic dipole antenna structure and method
    4.
    发明授权
    Magnetic dipole antenna structure and method 有权
    磁偶极天线结构及方法

    公开(公告)号：US06567053B1

    公开(公告)日：2003-05-20

    申请号：US09781720

    申请日：2001-02-12

    申请人： Eli Yablonovitch ,  Laurent Desclos ,  Sebastian Rowson

    发明人： Eli Yablonovitch ,  Laurent Desclos ,  Sebastian Rowson

    IPC分类号： H01Q1310

    CPC分类号： H01Q13/22 ,  H01Q5/35 ,  H01Q5/378 ,  H01Q13/12

    摘要： The spiral sheet antenna allows a small efficient antenna structure that is much smaller than the electromagnetic wavelength. It achieves the small size by introducing a high effective dielectric constant through geometry rather than through a special high dielectric constant material. It typically includes a rectangular cylinder-like shape, with a seam. The edges of the seam can overlap to make a high capacitance, or they can make a high capacitance by simply having the edges of the seam very close to each other. The high capacitance serves the same role as a high dielectric constant material in a conventional compact antenna.

    摘要翻译： 螺旋片天线允许比电磁波长小得多的小型有效天线结构。 它通过几何形状引入高有效介电常数而不是通过特殊的高介电常数材料来实现小尺寸。 它通常包括具有矩形圆柱形形状，具有接缝。 接缝的边缘可以重叠以产生高电容，或者它们可以通过简单地使接缝的边缘非常接近而产生高电容。 高电容与常规小型天线中的高介电常数材料具有相同的作用。

    Circuit and method for eliminating surface currents on metals
    5.
    发明授权
    Circuit and method for eliminating surface currents on metals 有权
    消除金属表面电流的电路和方法

    公开(公告)号：US06262495B1

    公开(公告)日：2001-07-17

    申请号：US09255832

    申请日：1999-02-23

    申请人： Eli Yablonovitch ,  Dan Sievenpiper

    发明人： Eli Yablonovitch ,  Dan Sievenpiper

    IPC分类号： H01Q138

    CPC分类号： H01Q15/008 ,  H01Q1/48 ,  H01Q1/52

    摘要： A two dimensional periodic pattern of capacitive and inductive elements defined in the surface of a metal sheet are provided by a plurality of conductive patches each connected to a conductive back plane sheet between which an insulating dielectric is disposed. The elements acts to suppress surface currents in the surface defined by them. In particular, the array forms a ground plane mesh for use in combination with an antenna. The performance of a ground plane mesh is characterized by a frequency band within which no substantial surface currents are able to propagate along the ground plane mesh. Use of such a ground plane in aircraft or other metallic vehicles thereby prevents radiation from the antenna from propagating along the metallic skin of the aircraft or vehicle. This eliminates surface currents between the antenna and the ground plane thereby reducing power loss and unwanted coupling between neighboring antennae. The surface also reflects electromagnetic waves without the phase shift that occurs on a normal metal surface. This allows antennas to be constructed that were previously impractical.

    摘要翻译： 限定在金属片表面的电容和感应元件的二维周期性图案由多个导电贴片提供，每个导电贴片均连接到导电背板片上，绝缘电介质设置在导电背板之间。 这些元件用于抑制由它们定义的表面中的表面电流。 特别地，该阵列形成与天线组合使用的接地平面网格。 地平面网格的性能的特征在于其中没有实质的表面电流能够沿着地平面网格传播的频带。 在飞机或其他金属车辆中使用这种接地平面，从而防止来自天线的辐射沿着飞机或车辆的金属皮肤传播。 这消除了天线和接地平面之间的表面电流，从而减少了相邻天线之间的功率损耗和不期望的耦合。 该表面也反映了在正常金属表面上发生的没有相移的电磁波。 这样就可以构建以前不可行的天线。

    Method of making a DH laser with strained layers by MBE
    6.
    发明授权
    Method of making a DH laser with strained layers by MBE 失效
    通过MBE制作具有应变层的DH激光器的方法

    公开(公告)号：US4804639A

    公开(公告)日：1989-02-14

    申请号：US117289

    申请日：1987-11-04

    申请人： Eli Yablonovitch

    发明人： Eli Yablonovitch

    IPC分类号： H01S5/32 ,  H01S5/343 ,  H01L21/306

    CPC分类号： B82Y20/00 ,  H01S5/32 ,  H01S5/34313 ,  H01S5/34306 ,  Y10S148/072 ,  Y10S148/095 ,  Y10S148/097 ,  Y10S148/169 ,  Y10S438/938

    摘要： A method of making a semiconductor laser from a gallium arsenide substrate of a first conductivity type by depositing a first layer of semiconductor material having the composition Al.sub.x Ga.sub.1-x As of first conductivity type on the substrate and a thin second layer of semiconductor material for quantum confinement having the composition In.sub.y Ga.sub.1-y As on the first layer. This layer experiences sufficient strain in the semiconductor structure so as to minimize the threshold current density. The device is completed by depositing a third layer of semiconductor material having the composition Al.sub.x Ga.sub.1-x As and of second conductivity type on the second layer, and depositing a fourth layer of semiconductor material having the composition GaAs and of second conductivity type on the third layer.

    摘要翻译： 一种通过在衬底上沉积具有第一导电类型的组成Al x Ga 1-x As的第一半导体材料层和用于量子限制的薄的第二半导体材料层来制造具有第一导电类型的砷化镓衬底的半导体激光器的方法， 组成InyGa1-yAs在第一层。 该层在半导体结构中经历足够的应变，以便使阈值电流密度最小化。 通过在第二层上沉积具有组成Al x Ga 1-x As和第二导电类型的第三层半导体材料并在第三层上沉积具有组成GaAs和第二导电类型的第四层半导体材料来完成该器件。

    Inverted, optically enhanced solar cell
    7.
    发明授权
    Inverted, optically enhanced solar cell 失效
    倒置，光学增强太阳能电池

    公开(公告)号：US4525593A

    公开(公告)日：1985-06-25

    申请号：US601080

    申请日：1984-04-16

    申请人： Eli Yablonovitch

    发明人： Eli Yablonovitch

    IPC分类号： H01L31/0224 ,  H01L31/042 ,  H01L31/074 ,  H01L31/06

    CPC分类号： H01L31/074 ,  H01L31/022425 ,  H01L31/03682 ,  H01L31/0504 ,  Y02E10/52 ,  Y02E10/546

    摘要： An ultra-high efficiency inverted solar cell structure is disclosed. At the rear of the cell is a high performance heterocontact made of SIPOS (a mixture of micro-crystalline silicon and silicon dioxide). At the edge of the cell, the opposite contact is of conventional heavily doped silicon. The edge contact is kept in the dark at least one diffusion length or one-third mm laterally displaced away from both the active illuminated region and from the active heterocontact.

    摘要翻译： 公开了一种超高效率反向太阳能电池结构。 在电池的后面是由SIPOS（微晶硅和二氧化硅的混合物）制成的高性能异质接触。 在电池的边缘，相反的接触是常规的重掺杂硅。 边缘接触在黑暗中保持至少一个扩散长度或三分之一毫米，横向移动远离有源照明区域和主动异质接触。