公开(公告)号：US07158545B2

公开(公告)日：2007-01-02

申请号：US10661831

申请日：2003-09-12

申请人： Qing Hu ,  Benjamin S. Williams

发明人： Qing Hu ,  Benjamin S. Williams

IPC分类号： H01S5/00

CPC分类号： H01S5/30 ,  H01S5/005 ,  H01S5/0655 ,  H01S5/22 ,  H01S5/3086 ,  H01S2301/173 ,  H01S2302/02

摘要： The present invention provides quantum cascade lasers and amplifier that operate in a frequency range of about 1 Terahertz to about 10 Terahertz. In one aspect, a quantum cascade laser of the invention includes a semiconductor heterostructure that provides a plurality of lasing modules connected in series. Each lasing module includes a plurality of quantum well structure that collectively generate at least an upper lasing state, a lower lasing state, and a relaxation state such that the upper and the lower lasing states are separated by an energy corresponding to an optical frequency in a range of about 1 to about 10 Terahertz. The lower lasing state is selectively depopulated via resonant LO-phonon scattering of electrons into the relaxation state.

摘要翻译： 本发明提供了在约1兆赫兹至约10兆赫兹的频率范围内工作的量子级联激光器和放大器。 在一个方面，本发明的量子级联激光器包括提供串联连接的多个激光模块的半导体异质结构。 每个激光模块包括多个量子阱结构，其共同地产生至少上激光状态，下激光状态和弛豫状态，使得上激光和下激光状态被分开与 范围约1至约10太赫兹。 通过电子的谐振LO-声子散射到弛豫状态，选择性地使较低的激光状态衰减。

公开(公告)号：US08541333B2

公开(公告)日：2013-09-24

申请号：US12856175

申请日：2010-08-13

申请人： Lunjia Xie ,  Yongtai Ling ,  Yu Tian ,  Zaixing Feng ,  Siyuan Zhao ,  Qing Hu ,  Zhufang Sun ,  Yu Kang

发明人： Lunjia Xie ,  Yongtai Ling ,  Yu Tian ,  Zaixing Feng ,  Siyuan Zhao ,  Qing Hu ,  Zhufang Sun ,  Yu Kang

IPC分类号： B01J31/00 ,  C08F4/02 ,  C08F4/44 ,  C08F4/06 ,  C08F2/00 ,  C08F4/00

CPC分类号： C08F10/06 ,  B01J27/135 ,  B01J27/138 ,  B01J31/0201 ,  B01J31/0255 ,  B01J31/0272 ,  B01J31/143 ,  B01J31/38 ,  C08F110/06 ,  C08F4/651 ,  C08F2500/15 ,  C08F2500/12 ,  C08F2500/04

摘要： A catalyst component for olefin polymerization comprising an α-cyanosuccinate compound as an internal electron donor, a catalyst comprising the catalyst component, and use of the catalyst in olefin polymerization. When used in propylene polymerization, the catalyst can exhibit good catalytic activity and good hydrogen response, and the resulting polymer can have a good isotacticity and a good molecular weight distribution.

摘要翻译： 一种用于烯烃聚合的催化剂组分，其包含作为内部电子给体的α-氰基琥珀酸盐化合物，包含催化剂组分的催化剂，以及在烯烃聚合中使用该催化剂。 当用于丙烯聚合时，该催化剂可表现出良好的催化活性和良好的氢响应，所得聚合物可具有良好的全同立构规整度和良好的分子量分布。

公开(公告)号：US08532152B2

公开(公告)日：2013-09-10

申请号：US12818337

申请日：2010-06-18

申请人： Qing Hu

发明人： Qing Hu

IPC分类号： H01S3/10

CPC分类号： H01S3/1003 ,  H01S3/106 ,  H01S5/02252 ,  H01S5/0607 ,  H01S5/0655 ,  H01S5/1032 ,  H01S5/1237 ,  H01S5/14 ,  H01S5/22 ,  H01S5/3402 ,  H01S2301/18 ,  H01S2302/02

摘要： The present invention provides frequency tunable solid-state radiation-generating devices, such as lasers and amplifiers, whose active medium has a size in at least one transverse dimension (e.g., its width) that is much smaller than the wavelength of radiation generated and/or amplified within the active medium. In such devices, a fraction of radiation travels as an evanescent propagating mode outside the active medium. It has been discovered that in such devices the radiation frequency can be tuned by the interaction of a tuning mechanism with the propagating evanescent mode.

摘要翻译： 本发明提供了频率可调固态辐射产生装置，例如激光器和放大器，其活性介质具有至少一个横向尺寸（例如，其宽度）的尺寸，该尺寸远小于产生的辐射的波长和/ 或在活性培养基内放大。 在这样的装置中，一部分辐射在活性介质外部作为消逝传播模式行进。 已经发现，在这种装置中，辐射频率可以通过调谐机构与传播的消逝模式的相互作用来调节。

公开(公告)号：US20100002739A1

公开(公告)日：2010-01-07

申请号：US12437818

申请日：2009-05-08

申请人： Qing Hu ,  Alan W. Lee

发明人： Qing Hu ,  Alan W. Lee

IPC分类号： H01S5/34 ,  H01S5/02 ,  H01S5/30

CPC分类号： H01S5/3402 ,  B82Y20/00 ,  H01S1/02 ,  H01S5/02288 ,  H01S5/14 ,  H01S5/141 ,  H01S5/3432 ,  H01S5/4087 ,  H01S2302/02

摘要： Terahertz quantum cascade (QC) devices are disclosed that can operate, e.g., in a range of about 1 THz to about 10 THz. In some embodiments, QC lasers are disclosed in which an optical element (e.g., a lens) is coupled to an output facet of the laser's active region to enhance coupling of the lasing radiation from the active region to an external environment. In other embodiments, terahertz amplifier and tunable terahertz QC lasers are disclosed.

摘要翻译： 公开了可以在例如约1THz至约10THz的范围内操作的太赫兹量子级联（QC）装置。 在一些实施例中，公开了一种QC激光器，其中光学元件（例如，透镜）耦合到激光器的有源区域的输出端面，以增强激活辐射从有源区域到外部环境的耦合。 在其他实施例中，公开了太赫兹放大器和可调谐太赫兹QC激光器。

公开(公告)号：US08619832B2

公开(公告)日：2013-12-31

申请号：US12437818

申请日：2009-05-08

申请人： Qing Hu ,  Alan Wei Min Lee

发明人： Qing Hu ,  Alan Wei Min Lee

IPC分类号： H01S5/00

CPC分类号： H01S5/3402 ,  B82Y20/00 ,  H01S1/02 ,  H01S5/02288 ,  H01S5/14 ,  H01S5/141 ,  H01S5/3432 ,  H01S5/4087 ,  H01S2302/02

摘要： Terahertz quantum cascade (QC) devices are disclosed that can operate, e.g., in a range of about 1 THz to about 10 THz. In some embodiments, QC lasers are disclosed in which an optical element (e.g., a lens) is coupled to an output facet of the laser's active region to enhance coupling of the lasing radiation from the active region to an external environment. In other embodiments, terahertz amplifier and tunable terahertz QC lasers are disclosed.

摘要翻译： 公开了可以在例如约1THz至约10THz的范围内操作的太赫兹量子级联（QC）装置。 在一些实施例中，公开了一种QC激光器，其中光学元件（例如，透镜）耦合到激光器的有源区域的输出端面，以增强激活辐射从有源区域到外部环境的耦合。 在其他实施例中，公开了太赫兹放大器和可调谐太赫兹QC激光器。

公开(公告)号：US07548566B2

公开(公告)日：2009-06-16

申请号：US11619025

申请日：2007-01-02

申请人： Qing Hu ,  Benjamin S. Williams

发明人： Qing Hu ,  Benjamin S. Williams

IPC分类号： H01S3/30

CPC分类号： H01S5/30 ,  H01S5/005 ,  H01S5/0655 ,  H01S5/22 ,  H01S5/3086 ,  H01S2301/173 ,  H01S2302/02

摘要： The present invention provides quantum cascade lasers and amplifier that operate in a frequency range of about 1 Terahertz to about 10 Terahertz. In one aspect, a quantum cascade laser of the invention includes a semiconductor heterostructure that provides a plurality of lasing modules connected in series. Each lasing module includes a plurality of quantum well structure that collectively generate at least an upper lasing state, a lower lasing state, and a relaxation state such that the upper and the lower lasing states are separated by an energy corresponding to an optical frequency in a range of about 1 to about 10 Terahertz. The lower lasing state is selectively depopulated via resonant LO-phonon scattering of electrons into the relaxation state.

摘要翻译： 本发明提供了在约1兆赫兹至约10兆赫兹的频率范围内工作的量子级联激光器和放大器。 在一个方面，本发明的量子级联激光器包括提供串联连接的多个激光模块的半导体异质结构。 每个激光模块包括多个量子阱结构，其共同地产生至少上激光状态，下激光状态和弛豫状态，使得上激光和下激光状态被分开与 范围约1至约10太赫兹。 通过电子的谐振LO-声子散射到弛豫状态，选择性地使较低的激光状态衰减。

公开(公告)号：US5900624A

公开(公告)日：1999-05-04

申请号：US654642

申请日：1996-05-29

申请人： Simon Verghese ,  Elliott R. Brown ,  Qing Hu

发明人： Simon Verghese ,  Elliott R. Brown ,  Qing Hu

IPC分类号： G06E3/00 ,  H01J40/14

CPC分类号： G06E3/005

摘要： An optical correlator for correlating incident optical signals is described. The correlator comprises a transmission line in close juxtaposition to a photoconductor. The photoconductor may be positioned within the transmission line. The transmission line and the photoconductor may be monolithically integrated on a substrate. The optical correlator has an electrical non-linear response to the incident optical signals that results from a voltage divider formed from the combination of the transmission line and the photoconductor. The electrical non-linear response is proportional to a second-order intensity autocorrelation function g.sup.(2) (.tau.). The response time of the electrical nonlinear response is less than the width of the narrowest pulse of the optical signals and may be less than twenty picoseconds.

摘要翻译： 描述了用于相关入射光信号的光相关器。 相关器包括与光电导体紧密并置的传输线。 光电导体可以位于传输线内。 传输线和光电导体可以单片集成在基板上。 光学相关器对由传输线和感光体的组合形成的分压器产生的入射光信号具有电非线性响应。 电非线性响应与二阶强度自相关函数g（2）（τ）成比例。 电子非线性响应的响应时间小于光信号最窄脉冲的宽度，可能小于二十皮秒。

公开(公告)号：US20110101250A1

公开(公告)日：2011-05-05

申请号：US12818337

申请日：2010-06-18

申请人： Qing Hu

发明人： Qing Hu

IPC分类号： G21G4/00 ,  H01S3/10

CPC分类号： H01S3/1003 ,  H01S3/106 ,  H01S5/02252 ,  H01S5/0607 ,  H01S5/0655 ,  H01S5/1032 ,  H01S5/1237 ,  H01S5/14 ,  H01S5/22 ,  H01S5/3402 ,  H01S2301/18 ,  H01S2302/02

摘要： The present invention provides frequency tunable solid-state radiation-generating devices, such as lasers and amplifiers, whose active medium has a size in at least one transverse dimension (e.g., its width) that is much smaller than the wavelength of radiation generated and/or amplified within the active medium. In such devices, a fraction of radiation travels as an evanescent propagating mode outside the active medium. It has been discovered that in such devices the radiation frequency can be tuned by the interaction of a tuning mechanism with the propagating evanescent mode.

摘要翻译： 本发明提供了频率可调固态辐射产生装置，例如激光器和放大器，其活性介质具有至少一个横向尺寸（例如，其宽度）的尺寸，该尺寸远小于产生的辐射的波长和/ 或在活性培养基内放大。 在这样的装置中，一部分辐射在活性介质外部作为消逝传播模式行进。 已经发现，在这种装置中，辐射频率可以通过调谐机构与传播的消逝模式的相互作用来调节。

公开(公告)号：US07692147B2

公开(公告)日：2010-04-06

申请号：US11385039

申请日：2006-03-20

申请人： Qing Hu ,  Alan W. Min Lee

发明人： Qing Hu ,  Alan W. Min Lee

IPC分类号： G01N21/35

CPC分类号： G01N21/3581 ,  G01N21/3151 ,  G01N21/3563

摘要： The present invention generally provides a terahertz (THz) imaging system that includes a source for generating radiation (e.g., a quantum cascade laser) having one or more frequencies in a range of about 0.1 THz to about 10 THz, and a two-dimensional detector array comprising a plurality of radiation detecting elements that are capable of detecting radiation in that frequency range. An optical system directs radiation from the source to an object to be imaged. The detector array detects at least a portion of the radiation transmitted through the object (or reflected by the object) so as to form a THz image of that object.

摘要翻译： 本发明通常提供一种太赫兹（THz）成像系统，其包括用于产生辐射的源（例如，量子级联激光器），其具有在约0.1THz至约10THz范围内的一个或多个频率，以及二维检测器 阵列包括能够检测该频率范围内的辐射的多个辐射检测元件。 光学系统将来自源的辐射引导到要成像的物体。 检测器阵列检测透过物体（或物体反射）的辐射的至少一部分，以形成该物体的太赫兹图像。

公开(公告)号：US20050058168A1

公开(公告)日：2005-03-17

申请号：US10661831

申请日：2003-09-12

申请人： Qing Hu ,  Benjamin Williams

发明人： Qing Hu ,  Benjamin Williams

IPC分类号： H01S5/00 ,  H01S5/22 ,  H01S5/30

CPC分类号： H01S5/30 ,  H01S5/005 ,  H01S5/0655 ,  H01S5/22 ,  H01S5/3086 ,  H01S2301/173 ,  H01S2302/02

摘要： The present invention provides quantum cascade lasers and amplifier that operate in a frequency range of about 1 Terahertz to about 10 Terahertz. In one aspect, a quantum cascade laser of the invention includes a semiconductor heterostructure that provides a plurality of lasing modules connected in series. Each lasing module includes a plurality of quantum well structure that collectively generate at least an upper lasing state, a lower lasing state, and a relaxation state such that the upper and the lower lasing states are separated by an energy corresponding to an optical frequency in a range of about 1 to about 10 Terahertz. The lower lasing state is selectively depopulated via resonant LO-phonon scattering of electrons into the relaxation state.

摘要翻译： 本发明提供了在约1兆赫兹至约10兆赫兹的频率范围内工作的量子级联激光器和放大器。 在一个方面，本发明的量子级联激光器包括提供串联连接的多个激光模块的半导体异质结构。 每个激光模块包括多个量子阱结构，其共同地产生至少上激光状态，下激光状态和弛豫状态，使得上激光和下激光状态被分开与 范围约1至约10太赫兹。 通过电子的谐振LO-声子散射到弛豫状态，选择性地使较低的激光状态衰减。