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    METHODS AND APPARATUS FOR BROADBAND ANGULAR SELECTIVITY OF ELECTROMAGNETIC WAVES
    6.
    发明申请
    METHODS AND APPARATUS FOR BROADBAND ANGULAR SELECTIVITY OF ELECTROMAGNETIC WAVES 审中-公开
    电磁波宽带选择性的方法与装置

    公开(公告)号：US20160252652A1

    公开(公告)日：2016-09-01

    申请号：US14630080

    申请日：2015-02-24

    申请人： Yichen Shen ,  Dexin Ye ,  Ivan Celanovic ,  Steven G. Johnson ,  John D. Joannopoulos ,  Marin Soljacic

    发明人： Yichen Shen ,  Dexin Ye ,  Ivan Celanovic ,  Steven G. Johnson ,  John D. Joannopoulos ,  Marin Soljacic

    IPC分类号： G02B1/00 ,  G02B5/30 ,  G02F1/01 ,  G02B5/26

    CPC分类号： G02B1/005 ,  G02B5/20 ,  G02B5/26 ,  G02B5/3066 ,  G02B5/3083 ,  G02F1/0131 ,  G02F1/0147

    摘要： A filter to transmit incident radiation at a predetermined incidence angle includes a plurality of photonic crystal structures disposed substantially along a surface normal direction of the filter. The photonic crystal structure includes a multilayer cell that comprises a first layer having a first dielectric permittivity, and a second layer having a second dielectric permittivity different from the first dielectric permittivity. The first layer and the second layer define a Brewster angle substantially equal to the predetermined incidence angle based on the first dielectric permittivity and the second permittivity. Each photonic crystal structure in the plurality of photonic crystal structures defines a respective bandgap, and the respective bandgaps of the plurality of photonic crystal structures, taken together, cover a continuous spectral region of about 50 nm to about 100 mm.

    摘要翻译： 用于以预定入射角透射入射辐射的滤光器包括基本沿着滤光器的表面法线方向设置的多个光子晶体结构。 光子晶体结构包括多层单元，其包括具有第一介电常数的第一层和具有不同于第一介电常数的第二介电常数的第二层。 基于第一介电常数和第二介电常数，第一层和第二层限定基本上等于预定入射角的布鲁斯特角。 多个光子晶体结构中的每个光子晶体结构限定相应的带隙，并且多个光子晶体结构的各个带隙一起覆盖约50nm至约100mm的连续光谱区域。

    Shock-wave modulation and control of electromagnetic radiation
    10.
    发明授权
    Shock-wave modulation and control of electromagnetic radiation 有权
    电波辐射的冲击波调制和控制

    公开(公告)号：US06809856B2

    公开(公告)日：2004-10-26

    申请号：US10412089

    申请日：2003-04-11

    申请人： Evan Reed ,  Marin Soljacic ,  John D. Joannopoulos ,  Steven G. Johnson ,  Maksim Skorobagatiy

    发明人： Evan Reed ,  Marin Soljacic ,  John D. Joannopoulos ,  Steven G. Johnson ,  Maksim Skorobagatiy

    IPC分类号： G02F202

    CPC分类号： B82Y20/00 ,  G02B6/1225 ,  G02F1/11 ,  G02F1/353 ,  G02F2202/32 ,  G02F2203/15

    摘要： Electromagnetic radiation is input into a photonic crystal having a shock wave propagating within, wherein interactions between the shock wave and the incident electromagnetic radiation provide for the modification of frequency and bandwidth associated with input electromagnetic radiation. Modifications in frequency of the electromagnetic radiation are on the order of the gap size with 100% efficiency in some cases. Additionally, the bandwidth associated with the electromagnetic radiation is increased or decreased by orders of magnitude based on such interactions. High amplitudes are trapped at the shock front for a controllable period of time, allowing for the controlled manipulation of pulses of light. Lastly, the incorporation of deliberately designed crystal defects and non-linear materials results in the conversion of all the energy in the defect band upwards in frequency if the highest group velocity is less than the shock wave speed.

    摘要翻译： 将电磁辐射输入到具有在其内部传播的冲击波的光子晶体，其中冲击波和入射电磁辐射之间的相互作用提供与输入电磁辐射相关联的频率和带宽的修改。 在某些情况下，电磁辐射频率的变化在间隙大小的数量级上具有100％的效率。 此外，与电磁辐射相关联的带宽基于这种相互作用增加或减少数量级。 高振幅被捕获在冲击前端一段可控的时间，从而允许对光脉冲的受控操纵。 最后，如果最高组速度小于冲击波速度，故意设计的晶体缺陷和非线性材料的结合导致在缺陷带中的所有能量在频率上向上的转换。