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    • 84. 发明授权
    • Multispectral plasmonic crystal sensors
    • 多光谱等离子体晶体传感器
    • US07705280B2
    • 2010-04-27
    • US11782799
    • 2007-07-25
    • Ralph G. NuzzoJohn A. RogersNathan H. MackMatthew StewartViktor MalyarchukJimin Yao
    • Ralph G. NuzzoJohn A. RogersNathan H. MackMatthew StewartViktor MalyarchukJimin Yao
    • H01L27/00
    • G01N21/554
    • The present invention provides plasmonic crystals comprising three-dimensional and quasi comprising three-dimensional distributions of metallic or semiconducting films, including multi-layered crystal structures comprising nanostructured films and film arrays. Plasmonic crystals of the present invention include precisely registered and deterministically selected nonplanar crystal geometries and spatial distributions providing highly coupled, localized plasmonic responses in thin film elements and/or nanostructures of the crystal. Coupling of plasmonic responses provided by three-dimensional and quasi-three dimensional plasmonic crystal geometries and structures of the present invention generates enhanced local plasmonic field distributions useful for detecting small changes in the composition of an external dielectric environment proximate to a sensing surface of the plasmonic crystal. Plasmonic crystal structures of the present invention are also useful for providing highly localized excitation and/or imaging of fluorophores proximate to the crystal surface.
    • 本发明提供包括三维和准包括金属或半导体膜的三维分布的等离子体晶体,包括包含纳米结构膜和膜阵列的多层晶体结构。 本发明的等离子体晶体包括在晶体的薄膜元件和/或纳米结构中提供高度耦合的局部等离子体响应的精确对准和确定性选择的非平面晶体几何形状和空间分布。 通过本发明的三维和三维等离子体晶体几何结构和结构提供的等离子体激发响应的耦合产生增强的局部等离子体激元场分布,其可用于检测接近等离子体激元的感测表面的外部电介质环境的组成的小变化 水晶。 本发明的等离子体晶体结构也可用于提供接近晶体表面的荧光团的高度局部激发和/或成像。
    • 86. 发明授权
    • Transmissive scanning delay line for optical coherence tomography
    • 用于光学相干断层扫描的透射扫描延迟线
    • US07417741B2
    • 2008-08-26
    • US11216403
    • 2005-08-31
    • Adrian Gh. PodoleanuJohn A. Rogers
    • Adrian Gh. PodoleanuJohn A. Rogers
    • G01B9/02
    • A61B3/102G01B9/0201G01B9/02091G01B2290/20G01B2290/35G01B2290/65G01N21/4795G02B17/023G02B26/06
    • A scanningdelay line for use in optical coherence tomography apparatus has a tiltable mirror, and optical convergence means for converging light incident, a dispersive element for dispersing light incident, and an optical-redirector for changing the direction of an icident beam light. The tiltable mirror, optical convergence element, said dispersive element, and optical redirector means are arranged in an optical configuration such that in sequence the dispersive element directs an input beam toward the optical convergence element, the optical convergence element directs the input beam toward the tiltable mirror, the tiltable mirror reflects the input beam as a first return beam toward the optical convergence element, the optical convergence element directs the first return beam toward the dispersive element, the dispersive element directs the first return beam toward the redirector, and the redirector redirects the first return beam toward the tiltable mirror via the optical convergence element in a direction such that the tiltable mirror reflects the first return beam toward the optical convergence optics element as a second return beam and the optical convergence element directs the second return beam toward the output port as part of an output beam bypassing the dispersive element and such that the output beam lies along substantially the same axis regardless of the angle of tilt of said tiltable mirror. The tilting said mirror varies introduces a variable optical delay into said output beam between the input and output pods. The delay line can be used in the transmission one of the arms of OCT interferometers, resulting in reduced walk-off and loss.
    • 用于光学相干断层摄影装置的扫描延髓线具有可倾斜的反射镜,用于会聚入射光的光学会聚装置,用于分散入射的光的分散元件和用于改变激光束光的方向的光学重定向器。 可倾斜反射镜,光学会聚元件,所述色散元件和光学重定向器装置被布置成光学构造,使得分散元件顺序地将输入光束引导到光学会聚元件,光学会聚元件将输入光束引向可倾斜的 反射镜,可倾斜镜将输入光束作为第一返回光束反射到光学会聚元件,光学会聚元件将第一返回光束引导到色散元件,色散元件将第一返回光束引向重定向器,重定向器重定向 所述第一返回光束经由所述光学会聚元件沿着使得所述可倾斜反射镜将所述第一返回光束作为第二返回光束反射到所述光学会聚光学元件的方向朝向所述可倾斜镜,并且所述光学会聚元件将所述第二返回光束引向所述输出 端口作为输出光束的一部分绕过 并且使得输出光束位于基本上相同的轴线上,而与所述可倾斜反射镜的倾斜角度无关。 所述反射镜的倾斜对于输入和输出盒之间的所述输出光束引入可变的光学延迟。 延迟线可用于OCT干涉仪臂之一传输,从而减少了离散和丢失。
    • 88. 发明授权
    • Liquid crystal polarization rotator and method of using same
    • 液晶偏振旋转器及其使用方法
    • US06895688B2
    • 2005-05-24
    • US10651689
    • 2003-08-29
    • Bharat R. AcharyaCheng Cher HuangChristi Kay MadsenJohn A. Rogers
    • Bharat R. AcharyaCheng Cher HuangChristi Kay MadsenJohn A. Rogers
    • G02F1/01F26B3/34
    • G02F1/0136G02F1/134363
    • A liquid crystal polarization rotator device is able to rotate polarization fast enough to compensate polarization mode dispersion. The amount or degree of rotation is rapidly reconfigurable. The device includes a cavity filled with a nematic liquid crystal material. The cavity has electrodes on a first face, e.g., a first substrate, and electrodes on a second face, e.g., a second substrate, opposite the first face. The electrodes are shaped and positioned to produce an electric field across the cavity capable of rotating the alignment direction of the molecules of the liquid crystal material in the cavity. The electrodes are patterned on the ends of optical fibers. Aligning and positioning of the electrodes on the ends of the optical fibers with a predetermined spacing forms the cavity that is filled with the nematic liquid crystal material. The filled cavity is a so-called liquid crystal microcell wave plate. A control system is used to control the “rapid” rotation of the alignment direction of the molecules of the liquid crystal material. The control system receives data regarding the polarization of light entering or leaving the microcell and adjusts the direction of the electric field also using trigger pulses such as to rotate the nematic liquid crystal material molecules by a first predetermined number of degrees greater than a second desired number of degrees of rotation. Then, the trigger pulses for the electric field are stopped after the molecules have rotated by the second desired number of degrees. In this manner, the molecules rotate by the second desired number of degrees much faster than if a pulse had been applied with the same speed to rotate them by the second desired number of degrees in he first place.
    • 液晶偏振旋转器能够快速旋转极化,以补偿偏振模色散。 旋转量或速度可以快速重构。 该装置包括填充向列型液晶材料的空腔。 空腔在第一面上具有电极,例如第一基底,以及与第一面相对的第二面,例如第二基底上的电极。 电极被成形和定位以产生能够旋转空腔中的液晶材料的分子的取向方向的空腔的电场。 电极在光纤的端部被图案化。 电极在光纤端部上以预定间隔的对准和定位形成填充向列型液晶材料的空腔。 填充腔是所谓的液晶微电池波片。 控制系统用于控制液晶材料分子的取向方向的“快速”旋转。 控制系统接收关于进入或离开微电池的光的偏振的数据,并且还使用触发脉冲调节电场的方向,例如使向列型液晶材料分子旋转大于第二所需数量的第一预定数量 的旋转度。 然后,在分子旋转了第二所需数量的度之后,停止用于电场的触发脉冲。 以这种方式,分子以比第一位置以相同速度施加脉冲旋转第二所需数量的速度快得多的第二所需数量的速度快得多。