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公开(公告)号：US06388799B1
公开(公告)日：2002-05-14
申请号：US09432762
申请日：1999-11-03
申请人： Donald Dominic Arnone , Andrew James Shields , Richard Andrew Hogg , Craig Michael Ciesla , David Mark Whittaker , Edmund Harold Linfield , Alexander Giles Davies
发明人： Donald Dominic Arnone , Andrew James Shields , Richard Andrew Hogg , Craig Michael Ciesla , David Mark Whittaker , Edmund Harold Linfield , Alexander Giles Davies
IPC分类号： G02F0135
CPC分类号： H01S3/108 , G01N21/3581 , H01S1/02 , H01S3/109 , H01S3/1109
摘要： An optical device for efficient radiation emission having a modulation region with phase matching means (1) for enhancing the phase matching between two different frequency signals propagating in the optical modulation region (1) in response to illumination by at least one incident beam (7, 8), the phase matching means (1), having a spatial variation in its refractive index (5) along the path of the incident radiation beam (7, 8). The device may be configured as a radiation source comprising a frequency conversion member (C2) for emitting a beam of radiation (553) in response to irradiation by one or more input beams (507), the emitted beam (553) having a frequency different to that of the one or more input beams (507), the one or more input beams (507) all being produced within a lasing cavity (defined by M3, M4, M5, M6 and output coupler (523)) and said frequency conversion member (C2) being located within said lasing cavity. The invention also extends to an imaging system using the radiation source.
摘要翻译： 一种用于高效辐射发射的光学装置，其具有带有相位匹配装置（1）的调制区域，用于响应于至少一个入射光束（7,7）的光照而增强在光学调制区域（1）中传播的两个不同频率信号之间的相位匹配， 8），相位匹配装置（1）沿着入射辐射束（7,8）的路径具有其折射率（5）的空间变化。 该装置可以被配置为包括用于响应于一个或多个输入光束（507）的照射而发射辐射束（553）的频率转换部件（C2）的辐射源，发射的光束（553）具有不同的频率 与一个或多个输入光束（507）的输入光束（507）的一个或多个输入光束（507）全部在激光腔（由M3，M4，M5，M6和输出耦合器（523）定义）内产生，并且所述频率转换 构件（C2）位于所述激光腔内。 本发明还延伸到使用辐射源的成像系统。
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公开(公告)号：US07460669B2
公开(公告)日：2008-12-02
申请号：US09983700
申请日：2001-10-25
IPC分类号： H04L9/00
CPC分类号： H04L9/0858 , H04L2209/34
摘要： An encoding method, decoding method and a communication method using single photons where information is directly encoded into each photon. In one embodiment at least two out of the three parameters of phases, polarization, and energy are used to encode information. In another embodiment, three or more non-orthogonal states with respect to each parameter are used. A further embodiment is also described which uses selective grouping of the results in order to more clearly detect the presence of an eavesdropper. Apparatus capable of performing the methods are also provided.
摘要翻译： 使用单个光子的编码方法，解码方法和通信方法，其中信息被直接编码到每个光子中。 在一个实施例中，相位，极化和能量的三个参数中的至少两个被用于对信息进行编码。 在另一个实施例中，使用关于每个参数的三个或更多个非正交状态。 还描述了另一实施例，其使用结果的选择性分组，以便更清楚地检测窃听者的存在。 还提供了能够执行这些方法的装置。
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公开(公告)号：US09401766B2
公开(公告)日：2016-07-26
申请号：US13524698
申请日：2012-06-15
申请人： Zhiliang Yuan , James Dynes , Andrew James Shields
发明人： Zhiliang Yuan , James Dynes , Andrew James Shields
CPC分类号： H04B10/70 , H04J14/0282 , H04L9/0855
摘要： A quantum communication system comprising a receiver and a plurality of transmitters, said receiver comprising a detector sub-system, each of said transmitters being configured to emit pulses of radiation, said detector subsystem comprising at least one detector, said detector being configured to detect said light pulses, the system comprising a timing control module, said timing control module being configured to control the number of light pulses received by the detector sub-system, such that just one light pulse from one transmitter reaches the detector sub-system at any one time, the timing control module also allowing the transmitter which sent said pulse to be identified.
摘要翻译： 一种包括接收机和多个发射机的量子通信系统，所述接收机包括检测器子系统，每个所述发射机被配置为发射辐射脉冲，所述检测器子系统包括至少一个检测器，所述检测器被配置为检测所述 光脉冲，所述系统包括定时控制模块，所述定时控制模块被配置为控制由检测器子系统接收的光脉冲的数量，使得来自一个发射机的仅一个光脉冲在任何一个处到达检测器子系统 时间控制模块还允许发送所述脉冲的发送器被识别。
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公开(公告)号：US08755687B2
公开(公告)日：2014-06-17
申请号：US13476816
申请日：2012-05-21
IPC分类号： H04B10/00
CPC分类号： H04L7/0008 , H04B10/70 , H04L9/0852
摘要： A communication system comprising an emitter of weak light pulses, a detector which is capable of detecting single photons, and a source of a clock signal, wherein said emitter and detector are synchronized using said clock signal, the system further comprising a frequency divider for said clock signal to produce a reduced frequency clock signal and a clock regenerator for regenerating the original clock signal from the reduced frequency clock signal, the system further comprising a communication channel configured to communicate the clock signal between the emitter and detector, the clock signal being reduced before sending through said channel and reconstructed after it has exited said channel.
摘要翻译： 一种包括弱光脉冲发射器，能够检测单个光子的检测器和时钟信号源的通信系统，其中所述发射器和检测器使用所述时钟信号同步，所述系统还包括用于所述时钟信号的分频器 时钟信号以产生降频时钟信号和时钟再生器，用于从降频时钟信号再生原始时钟信号，该系统还包括被配置为在发射极和检测器之间传送时钟信号的通信信道，时钟信号被减少 在通过所述信道发送之后，在已经退出所述信道之后被重构。
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公开(公告)号：US08553884B2
公开(公告)日：2013-10-08
申请号：US13421045
申请日：2012-03-15
IPC分类号： H04K1/00
CPC分类号： H04B10/70
摘要： A quantum communication system including an emitter and a receiver, the emitter including an encoder and at least one photon source and being configured to pass a signal pulse and a reference pulse, which are separated in time, through the encoder and output the signal pulse and the reference pulse. The reference pulse has a higher probability of containing more than one photon than the signal pulse. The receiver includes a decoder and at least one detector for measuring the signal pulse and the reference pulse.
摘要翻译： 一种包括发射器和接收器的量子通信系统，发射器包括编码器和至少一个光子源，并被配置为通过编码器传递在时间上分离的信号脉冲和参考脉冲，并输出信号脉冲和 参考脉冲。 参考脉冲具有比信号脉冲包含多于一个光子的更高概率。 接收机包括解码器和用于测量信号脉冲和参考脉冲的至少一个检测器。
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公开(公告)号：US08461569B2
公开(公告)日：2013-06-11
申请号：US13104368
申请日：2011-05-10
IPC分类号： H01L29/06
CPC分类号： H01L29/125 , B82Y10/00 , H01L33/0062 , H01L33/06 , H01L33/105 , H01L2933/0083 , H01S5/105 , H01S5/183 , H01S5/3412 , H01S2301/173 , H01S2304/04
摘要： A semiconductor device includes a quantum dot and a plurality of layers, wherein said plurality of layers includes: a first layer; a stressor layer; and a patterned layer wherein said stressor layer overlies said first layer and said patterned layer overlies said stressor layer; wherein said stressor layer has a substantially different lattice constant to said first layer and said patterned layer and has a pit provided in said layer; said quantum dot lying above said patterned layer aligned with said pit.
摘要翻译： 半导体器件包括量子点和多个层，其中所述多个层包括：第一层; 压力层; 以及图案化层，其中所述应力层覆盖所述第一层，并且所述图案化层覆盖所述应力层; 其中所述应力层具有与所述第一层和所述图案化层基本不同的晶格常数，并且在所述层中具有凹坑; 所述量子点位于与所述凹坑对准的所述图案化层之上。
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公开(公告)号：US08295485B2
公开(公告)日：2012-10-23
申请号：US11530358
申请日：2006-09-08
IPC分类号： H04K1/00
CPC分类号： H04B10/70 , H04L9/0858
摘要： A measuring unit for determining information from an input signal, the unit comprising a decoder configured to perform a measurement on said input signal using two operators, a first operator configured to distinguish between two orthogonal states of said input signal and a second operator selected from an inverting operator configured to invert the result of the measurement by the first operator and a null operator configured to have a null effect on the result of the measurement by the first operator.
摘要翻译： 一种用于从输入信号确定信息的测量单元，所述单元包括被配置为使用两个运算符对所述输入信号执行测量的解码器，第一运算器，被配置为区分所述输入信号的两个正交状态和从 反转操作器被配置为反转第一操作者的测量结果，以及被配置为对第一操作者对测量结果具有零效果的空操作符。
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公开(公告)号：US20110242632A1
公开(公告)日：2011-10-06
申请号：US13039893
申请日：2011-03-03
CPC分类号： G06N99/002 , B82Y10/00
摘要： A component comprising a qubit and a controller for said qubit, said component comprising a quantum dot and an excitation portion configured to produce a neutral exciton state in said quantum dot to form said qubit, the component further comprising a measuring unit to make an optical measurement relating to the orientation of said state, wherein said controller comprises voltage source coupled to electrical contacts configured to apply a modulated electric field across said quantum dot, wherein the modulation is faster than the decay time of said neutral exciton state.
摘要翻译： 一种包括量子位的组件和用于所述量子位的控制器，所述组件包括量子点和激励部分，其被配置为在所述量子点中产生中性激子状态以形成所述量子位，所述组件还包括测量单元以进行光学测量 涉及所述状态的取向，其中所述控制器包括耦合到电触点的电压源，所述电触点被配置为在所述量子点上施加调制电场，其中所述调制比所述中性激子状态的衰减时间快。
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公开(公告)号：US20100111305A1
公开(公告)日：2010-05-06
申请号：US12529495
申请日：2008-02-29
CPC分类号： G01J1/44 , G01J2001/442 , G01J2001/4466 , H04B10/697
摘要： A photon detection system including a photon detector configured to detect single photons, a signal divider to divide the output signal of the photon detector into a first part and a second part, wherein the first part is substantially identical to the second part, a delay mechanism to delay the second part with respect to the first part, and a combiner to combine the first and delayed second parts of the signal such that the delayed second part is used to cancel periodic variations in the first part of the output signal.
摘要翻译： 一种光子检测系统，包括配置成检测单个光子的光子检测器，用于将光子检测器的输出信号划分成第一部分和第二部分的信号分配器，其中第一部分基本上与第二部分相同;延迟机构 相对于第一部分延迟第二部分，以及组合器，以组合信号的第一和延迟的第二部分，使得延迟的第二部分被用于消除输出信号的第一部分中的周期性变化。
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公开(公告)号：US07132676B2
公开(公告)日：2006-11-07
申请号：US10145140
申请日：2002-05-15
IPC分类号： H01L29/06
CPC分类号： H01S5/10 , B82Y20/00 , H01S5/041 , H01S5/1042 , H01S5/105 , H01S5/3412
摘要： A photon source comprising a quantum dot comprising a confined conduction band energy level capable of being populated with at least one carrier and a confined valence band energy level capable of being populated by at least one carrier is provided, the source further comprises supply means for intermittently supplying at least one carrier to the energy levels to create an exciton in the quantum dot, wherein the supply means are configured to regulate the supply of carriers such that as the exciton decays either a single photon or a plurality of single photons each having different distinct energies are emitted during a predetermined time interval. The source is configured to be able to enhance the production of a desired type of exciton and can also be configured to exploit the use of higher order excitons such as biexcitons.
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