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81. 发明授权

US6101300A High efficiency channel drop filter with absorption induced on/off switching and modulation 失效
公开(公告)号：US6101300A
公开(公告)日：2000-08-08
申请号：US80037
申请日：1998-05-15
申请人： Shanhui Fan , Pierre R. Villeneuve , John D. Joannopoulos , Brent E. Little , Hermann A. Haus
发明人： Shanhui Fan , Pierre R. Villeneuve , John D. Joannopoulos , Brent E. Little , Hermann A. Haus
IPC分类号： G02B6/12 , G02B6/122 , G02F1/01 , G02F1/025 , G02F1/313 , G02F1/365 , G02B6/293
CPC分类号： G02F1/3132 , B82Y20/00 , G02B6/12007 , G02B6/1225 , H04Q3/00 , G02F1/17 , G02F2201/066 , G02F2202/32 , G02F2203/15 , G02F2203/585
摘要： A highly efficient channel drop filter. The filter employs a coupling element including a resonator-system between two waveguides, which contains at least two resonant modes. The resonator-system includes one or more interacting resonant cavities which in addition to being coupled to the waveguides, can also be coupled directly among themselves and indirectly among themselves via the waveguides. Each component of the coupling element can be configured or adjusted individually. The geometry and/or dielectric constant/refractive index of the resonator-system are configured so that the frequencies and decay rates of the resonant modes are made to be substantially the same. The filter can achieve 100% signal transfer between the waveguides at certain frequencies, while completely prohibiting signal transfer at other frequencies. In exemplary embodiments, the filter is configured with photonic crystals. In accordance with alternative embodiments of the invention, the filter is configured as an absorption induced on/off switch and modulator. The switching action is achieved with either electrical or optical absorption.

82. 发明授权

US5990850A Metallodielectric photonic crystal 失效
标题翻译：金属电介质光子晶体
公开(公告)号：US5990850A
公开(公告)日：1999-11-23
申请号：US706542
申请日：1996-09-05
申请人： Elliott R. Brown , John D. Joannopoulos , Shanhui Fan , Pierre R. Villeneuve , Oliver B. McMahon
发明人： Elliott R. Brown , John D. Joannopoulos , Shanhui Fan , Pierre R. Villeneuve , Oliver B. McMahon
IPC分类号： G02B5/20 , G02B6/122 , H01Q15/00 , H01Q15/14 , H01Q15/02
CPC分类号： H01Q15/006 , B82Y20/00 , G02B5/206 , G02B6/1225
摘要： A metallodielectric photonic crystal including a plurality of elements, each having a non-dielectric component, arranged with respect to each other in a three-dimensionally periodic lattice. The non-dielectric components being spatially isolated from one another, the lattice exhibiting a band gap in the spectrum of electromagnetic radiation modes propagating through said lattice. A support structure positions the elements in the three-dimensionally periodic lattice. In an exemplary embodiment, the elements are metallic spheres arranged within dielectric material. The three-dimensionally periodic lattice can include a face-centered-cubic lattice which exhibits a unidirectional photonic band gap, or a diamond lattice which exhibits an omnidirectional photonic band gap. The diamond lattice structure includes a gap width to midgap frequency ratio which can exceed 60%.
摘要翻译：一种金属电介质光子晶体，其包括多个元件，每个元件具有非电介质成分，以三维周期性晶格相对于彼此布置。非介电成分彼此空间隔离，晶格在通过所述晶格传播的电磁辐射模式的光谱中呈现带隙。支撑结构将元件定位在三维周期性晶格中。在示例性实施例中，元件是布置在电介质材料内的金属球体。三维周期性晶格可以包括呈现单向光子带隙的面心立方晶格，或者呈现全向光子带隙的金刚石晶格。金刚石晶格结构包括间隙宽度与中间频率比可超过60％。

83. 发明授权

US5955749A Light emitting device utilizing a periodic dielectric structure 失效
标题翻译：利用周期性电介质结构的发光器件
公开(公告)号：US5955749A
公开(公告)日：1999-09-21
申请号：US758955
申请日：1996-12-02
申请人： John D. Joannopoulos , Shanhui Fan , Pierre R. Villeneuve , E. Frederick Schubert
发明人： John D. Joannopoulos , Shanhui Fan , Pierre R. Villeneuve , E. Frederick Schubert
IPC分类号： G02B6/122 , H01L33/08 , H01L33/24 , H01L33/00
CPC分类号： H01L33/24 , B82Y20/00 , G02B6/1225 , H01L33/08
摘要： 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.
摘要翻译：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。

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