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    • 12. 发明申请
    • Massive parallel generation of nonclassical photons via polaritonic superfluid to mott- insulator quantum phase transition
    • 通过极化超声波大规模平行生成非经典光子到动力学绝缘体量子相变
    • US20100258746A1
    • 2010-10-14
    • US12798751
    • 2010-04-08
    • Yun-Chung NaYoshihisa Yamamoto
    • Yun-Chung NaYoshihisa Yamamoto
    • G21G7/00
    • B82Y10/00G06N10/00
    • Deterministic generation of nonclassical photons by producing a dilute gas of exciton-polaritons in a solid-state microcavity that includes a periodic array of potential well traps. A photon-exciton frequency detuning is modulated in the microcavity to produce a polaritonic quantum phase transition from a superfluid state to a Mott-insulator state. The nonclassical photons are then generated simultaneously by radiative decay of exciton-polaritons in the microcavity. The nonclassical photons may be indistinguishable single photons, in which case the dilute gas of exciton-polaritons is produced such that on to average there is one polariton per potential well trap. Alternatively, the generated nonclassical photons may be polarization-entangled photon pairs, in which case the dilute gas of exciton-polaritons is produced such that on average there are two polaritons per potential well trap.
    • 通过在固态微腔中产生激子 - 极化子的稀释气体来确定性地产生非经典光子,其包括潜在阱阱的周期性阵列。 在微腔中调制光子 - 激子频率失谐以产生从超流体状态到Mott绝缘体状态的极化量子相变。 然后通过微腔中的激子 - 极化子的辐射衰减同时产生非经典光子。 非经典光子可能是不可区分的单个光子,在这种情况下,产生激子 - 极化子的稀释气体,使得平均每个潜在的阱陷阱有一个极化子。 或者,所生成的非经典光子可以是偏振纠缠的光子对,在这种情况下,产生激子 - 极化子的稀释气体,使得每个势阱陷阱平均有两个极化子。
    • 15. 发明授权
    • Fuel injection device of internal combustion engine
    • 内燃机燃油喷射装置
    • US07398765B2
    • 2008-07-15
    • US11446967
    • 2006-06-06
    • Yoshihisa Yamamoto
    • Yoshihisa Yamamoto
    • F02M47/02
    • F02M63/0047F02M57/025F02M59/366F02M63/0007F02M63/0029F02M63/0049
    • A fuel injection device has a two-way control valve driven by a two-position actuator. The control valve directly controls oil pressure in a back pressure chamber to control an injection operation of an injection nozzle. A two-position three-way flow passage switching valve operated by control pressure of the control valve selectively connects a control chamber of a pressure intensifier with a fuel supply passage leading to a pressure accumulator or a pressure release passage leading to a low-pressure system to indirectly control oil pressure in the control chamber. The flow passage switching valve starts a pressure intensifying operation in retard of the injection operation. When pressure is supplied to the control chamber, stoppage of the pressure intensification operation and returning operation of the pressure intensifier do not lag behind the injection operation.
    • 燃料喷射装置具有由两位置致动器驱动的双向控制阀。 控制阀直接控制背压室中的油压,以控制喷射喷嘴的喷射操作。 通过控制阀的控制压力操作的两位三通流路切换阀选择性地将增压器的控制室与通向压力蓄能器的通道或通向低压系统的压力释放通道 以间接控制控制室内的油压。 流路切换阀在喷射操作的延迟中开始压力增加动作。 当向控制室供给压力时,加压增压器的停止和增压器的返回动作不落后于喷射动作。
    • 16. 发明申请
    • Half-wavelength micropost microcavity with electric field maximum in the high-refractive-index material
    • 在高折射率材料中具有最大电场的半波长微孔微腔
    • US20070183471A1
    • 2007-08-09
    • US10631665
    • 2003-07-30
    • Jelena VuckovicYoshihisa Yamamoto
    • Jelena VuckovicYoshihisa Yamamoto
    • H01S5/00H01S3/08H01S3/04
    • G06N99/002B82Y10/00B82Y20/00H01S5/1042H01S5/18358H01S5/3412
    • A micropost microcavity device has a maximum field intensity at the center of a high-index spacer as well as a small mode volume. The device has an approximately half-wavelength thick low-index spacer [400] sandwiched between two quarter wave stacks [410, 420]. The low-index spacer has a high-index subspacer layer [470] positioned at its center. The subspacer layer has a thickness smaller than a quarter wavelength. As a result, the electric field intensity remains a maximum at the center of the spacer where the high-index subspacer is positioned. A quantum dot or other active region [480] may be embedded within the subspacer [470]. The microcavity devices provide, for example, single photon sources, single dot lasers, low-threshold quantum dot or quantum well lasers, or devices for strong coupling between a single quantum dot and the cavity field which can be used as components of photonic integrated circuits, quantum computers, quantum networks, or quantum cryptographic systems.
    • 微孔微腔装置在高折射率间隔物的中心处具有最大场强以及小模量体积。 器件具有夹在两个四分之一波长叠层[410,420]之间的大约半波长的低折射率间隔物[400]。 低折射率间隔物具有位于其中心的高折射率子间隔层[470]。 子间隔层具有小于四分之一波长的厚度。 结果,电场强度在高折射率子间隔物定位的间隔物的中心处保持最大。 量子点或其他有源区域[480]可嵌入在子间隔区[470]内。 微腔装置提供例如单光子源,单点激光器,低阈值量子点或量子阱激光器,或用于单个量子点和腔场之间的强耦合的装置,其可以用作光子集成电路的组件 量子计算机,量子网络或量子密码系统。
    • 18. 发明授权
    • Quantum-dot triggered photon and triggered photon pair
    • 量子点触发光子和触发光子对
    • US06956330B2
    • 2005-10-18
    • US10450336
    • 2001-09-13
    • Charles SantoriMatthew PeltonYoshihisa Yamamoto
    • Charles SantoriMatthew PeltonYoshihisa Yamamoto
    • H01S3/102G06N99/00H01S3/06H01S3/094H01S5/34H01J7/24H01S3/10
    • G06N99/002B82Y10/00H04B10/70
    • A device including a photon emitter, a light source, and a filter with a corresponding method for producing triggered single photons and triggered pairs of polarization-entangled photons are provided. The light source delivers a pulse to a photon emitter and generates pairs of electrons and holes to emit photons. The light source includes a mechanism to tune a pulse wavelength to an excited state-absorption resonance of the photon emitter. The light source could also include a device to selectively choose a polarization to create the pairs of electrons and holes of a particular spin. A filter isolates the last and single photon. Optionally, a micro-cavity is included to direct the emitted photons and couple to one or more optical elements. When the device or the method is used to produce triggered pairs of polarization-entangled photons, it works almost the same as for the single photons, except for modifications to the way the light source excites the photon emitter and how emission filtering is performed.
    • 提供了包括光子发射器,光源和具有用于产生触发的单个光子和触发的偏振纠缠的光子对的相应方法的滤光器的装置。 光源向光子发射器提供脉冲并产生成对的电子和空穴以发射光子。 光源包括将脉冲波长调谐到光子发射器的激发态吸收共振的机构。 光源还可以包括选择性地选择极化以产生特定旋转的电子和空穴对的装置。 滤波器隔离最后一个光子和单个光子。 可选地,包括微腔以引导发射的光子并耦合到一个或多个光学元件。 当器件或方法用于产生触发的偏振纠缠光子对时,除了对光源激发光子发射器的方式进行修改以及如何执行发射滤波之外,它与单个光子几乎相同。