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    • 54. 发明授权
    • Light emitting device utilizing a periodic dielectric structure
    • 利用周期性电介质结构的发光器件
    • US5955749A
    • 1999-09-21
    • US758955
    • 1996-12-02
    • John D. JoannopoulosShanhui FanPierre R. VilleneuveE. Frederick Schubert
    • John D. JoannopoulosShanhui FanPierre R. VilleneuveE. Frederick Schubert
    • G02B6/122H01L33/08H01L33/24H01L33/00
    • H01L33/24B82Y20/00G02B6/1225H01L33/08
    • A light emitting device comprising a substrate and a dielectric structure having at least a two-dimensionally periodic variation of dielectric constant which exhibits a spectrum of electromagnetic modes including guided modes of frequencies below a predetermined frequency cutoff and radiation modes of frequencies above and below said predetermined frequency cutoff, the two-dimensionally periodic variation of dielectric constant of the dielectric structure introducing a band gap between the guided modes. A radiation source, such as a quantum well, is associated with said structure, and generates electromagnetic radiation which couples to the radiation modes resulting in radiation extraction from the structure. The band gap allows the radiation to couple to radiation modes rather than to guided modes resulting in radiation extraction from the structure. The structure can be fabricated such that a radiation reflector is disposed between the structure and the substrate.
    • 一种发光器件,包括具有至少二维周期性介电常数变化的介质结构和电介质结构,所述介电常数表现出包括低于预定频率截止频率的导频模式的电磁模式谱,以及高于和低于所述预定频率的辐射模式 频率截止,介电结构的介电常数的二维周期性变化引入引导模式之间的带隙。 诸如量子阱的辐射源与所述结构相关联,并且产生耦合到辐射模式的电磁辐射,从而导致来自结构的辐射提取。 带隙允许辐射耦合到辐射模式,而不是引导模式,从而导致从结构的辐射提取。 该结构可以被制造成使得辐射反射器设置在结构和衬底之间。
    • 55. 发明授权
    • Three-dimensional periodic dielectric structures having photonic Dirac points
    • 具有光狄拉克点的三维周期介电结构
    • US09046647B2
    • 2015-06-02
    • US13769954
    • 2013-02-19
    • Jorge Bravo-AbadJohn D. JoannopoulosMarin Soljacic
    • Jorge Bravo-AbadJohn D. JoannopoulosMarin Soljacic
    • G02B6/12G02B6/122G02B1/00
    • G02B6/1225G02B1/005G02B2006/1213
    • The dielectric, three-dimensional photonic materials disclosed herein feature Dirac-like dispersion in quasi-two-dimensional systems. Embodiments include a face-centered cubic (fcc) structure formed by alternating layers of dielectric rods and dielectric slabs patterned with holes on respective triangular lattices. This fcc structure also includes a defect layer, which may comprise either dielectric rods or a dielectric slab with patterned with holes. This defect layer introduces Dirac cone dispersion into the fcc structure's photonic band structure. Examples of these fcc structures enable enhancement of the spontaneous emission coupling efficiency (the β-factor) over large areas, contrary to the conventional wisdom that the β-factor degrades as the system's size increases. These results enable large-area, low-threshold lasers; single-photon sources; quantum information processing devices; and energy harvesting systems.
    • 本文公开的电介质三维光子材料在准二维体系中表现出狄拉克色散。 实施例包括通过在相应的三角形格子上用孔图案化的介电棒和介电板的交替层形成的面心立方(fcc)结构。 该fcc结构还包括缺陷层,其可以包括介质棒或具有图案化孔的电介质板。 该缺陷层将狄拉克锥体色散引入到fcc结构的光子带结构中。 这些fcc结构的实例使得能够在大面积上增强自发发射耦合效率(“因子”),这与传统的智慧一样,随着系统尺寸的增加,该因素降低。 这些结果可以实现大面积,低阈值的激光器; 单光源; 量子信息处理设备; 和能量收集系统。
    • 56. 发明申请
    • THREE-DIMENSIONAL PERIODIC DIELECTRIC STRUCTURES HAVING PHOTONIC DIRAC POINTS
    • 具有光子DIRAC点的三维周期性电介质结构
    • US20130279850A1
    • 2013-10-24
    • US13769954
    • 2013-02-19
    • Jorge Bravo-AbadJohn D. JoannopoulosMarin Soljacic
    • Jorge Bravo-AbadJohn D. JoannopoulosMarin Soljacic
    • G02B6/122
    • G02B6/1225G02B1/005G02B2006/1213
    • The dielectric, three-dimensional photonic materials disclosed herein feature Dirac-like dispersion in quasi-two-dimensional systems. Embodiments include a face-centered cubic (fcc) structure formed by alternating layers of dielectric rods and dielectric slabs patterned with holes on respective triangular lattices. This fcc structure also includes a defect layer, which may comprise either dielectric rods or a dielectric slab with patterned with holes. This defect layer introduces Dirac cone dispersion into the fcc structure's photonic band structure. Examples of these fcc structures enable enhancement of the spontaneous emission coupling efficiency (the β-factor) over large areas, contrary to the conventional wisdom that the β-factor degrades as the system's size increases. These results enable large-area, low-threshold lasers; single-photon sources; quantum information processing devices; and energy harvesting systems.
    • 本文公开的电介质三维光子材料在准二维体系中表现出狄拉克色散。 实施例包括通过在相应的三角形格子上用孔图案化的介电棒和介电板的交替层形成的面心立方(fcc)结构。 该fcc结构还包括缺陷层,其可以包括介质棒或具有图案化孔的电介质板。 该缺陷层将狄拉克锥体色散引入到fcc结构的光子带结构中。 这些fcc结构的实例使得能够在大面积上增强自发发射耦合效率(β因子),这与传统的智慧相反,β因子随着系统尺寸的增加而降低。 这些结果可以实现大面积,低阈值的激光器; 单光源; 量子信息处理设备; 和能量收集系统。