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公开(公告)号：US07122813B2
公开(公告)日：2006-10-17
申请号：US10485252
申请日：2002-08-09
IPC分类号： H01L29/06
摘要： A device for generating terahertz radiation. The device comprising a dipole generating layer, a coupling block and an extraction block. The coupling block is transparent to laser light and is in contact with the surface of the dipole generating layer to couple light from a laser to the surface of the dipole generating layer, when the device is in use. The extraction block is located in contact with the surface of the dipole generating layer to provide an emission extraction surface. The refractive indices of the dipole forming layer, the coupling block and the extraction block are substantially equal. In this way, the dipole which is generated upon illumination of the dipole generating layer by a laser, has an axis which is not perpendicular to the emission.
摘要翻译： 用于产生太赫兹辐射的装置。 该装置包括偶极发生层，耦合块和提取块。 耦合块对于激光是透明的，并且当该器件在使用中时，它与偶极发生层的表面接触以将来自激光器的光耦合到偶极发生层的表面。 提取块位于与偶极发生层的表面接触以提供发射提取表面。 偶极形成层，耦合块和提取块的折射率基本相等。 以这种方式，通过激光照射偶极子产生层时产生的偶极子具有不垂直于发射的轴。
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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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