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    • 31. 发明授权
    • Binary arrays of nanoparticles for nano-enhanced Raman scattering molecular sensors
    • 用于纳米增强拉曼散射分子传感器的二元纳米颗粒阵列
    • US07292334B1
    • 2007-11-06
    • US11090352
    • 2005-03-25
    • Alexandre M. BratkovskiTheodore I. Kamins
    • Alexandre M. BratkovskiTheodore I. Kamins
    • G01J3/44
    • G01N21/658
    • A nano-enhanced Raman scattering (NERS)-active structure includes a substrate, a monolayer of nanoparticles disposed on a surface of the substrate, and a spacer material surrounding each nanoparticle in the monolayer of nanoparticles. The monolayer of nanoparticles includes a first plurality of nanoparticles and a second plurality of nanoparticles. The nanoparticles of the second plurality are interspersed among the first plurality and exhibit a plasmon frequency that differs from any plasmon frequency exhibited by the first plurality. Also described are a method for forming such a NERS-active structure and a NERS system that includes a NERS-active structure, an excitation radiation source, and a detector for detecting Raman scattered radiation.
    • 纳米增强拉曼散射(NERS)活性结构包括底物,设置在基底表面上的单层纳米颗粒,以及围绕纳米颗粒单层中的每个纳米颗粒的间隔物。 纳米颗粒的单层包括第一多个纳米颗粒和第二多个纳米颗粒。 第二多个纳米颗粒散布在第一多个中,并且表现出与第一多个表现出的任何等离子体频率不同的等离子体激元频率。 还描述了形成这样的NERS-活性结构的方法和包括NERS-活性结构,激发辐射源和用于检测拉曼散射辐射的检测器的NERS系统。
    • 32. 发明授权
    • Polarized radiation source using spin extraction/injection
    • 使用旋转萃取/注射的极化辐射源
    • US07208775B2
    • 2007-04-24
    • US11061060
    • 2005-02-18
    • Viatcheslav V. OsipovAlexandre M. Bratkovski
    • Viatcheslav V. OsipovAlexandre M. Bratkovski
    • H01L33/00
    • H01L33/02H01L33/0004H01S5/04H01S5/32
    • Spin-polarized electrons can be efficiently extracted from an n-doped semiconductor layer (n-S) by forming a modified Schottky contact with a ferromagnetic material (FM) and a δ-doped layer at an interface under forward bias voltage conditions. Due to spin-selection property of the FM-S junction, spin-polarized carriers appear in the n-doped semiconductor layer near the FM-S interface. If a FM-n-n′-p heterostructure is formed, where the n′ region is a narrower gap semiconductor, polarized electrons from the n-S region and holes from the p-S region can diffuse into the n′-S region under the influence of independent voltages applied between the FM and n′ regions and the n′ and p regions. The polarized electrons and holes recombine in the n′-S region and produce polarized light. The polarization can be controlled and modulated by controlling the applied voltages.
    • 通过在正向偏压条件下在界面处形成与铁磁材料(FM)和δ掺杂层的改性肖特基接触,可以从n掺杂半导体层(n-S)有效地提取自旋极化电子。 由于FM-S结的自旋选择性质,自旋极化载流子出现在FM-S界面附近的n掺杂半导体层中。 如果形成FM-n-n'-p异质结构,其中n'区域是较窄的间隙半导体,则来自nS区域的极化电子和来自pS区域的空穴可以扩散到n'-S区域的影响下 在FM和n'区域以及n'和p区域之间施加独立电压。 极化的电子和空穴在n'-S区域复合并产生偏振光。 可以通过控制施加的电压来控制和调制极化。