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公开(公告)号：EP2038971A2
公开(公告)日：2009-03-25
申请号：EP07840153.6
申请日：2007-04-24
IPC分类号： H01S5/00
CPC分类号： H01S1/02
摘要： A method of THz photon generation comprising: providing a magnon gain medium; wherein the magnon gain medium supports generation of nonequilibrium magnons; and injecting nonequilibrium electrons into the magnon gain medium. Propagation of nonequilibrium electrons in the magnon gain medium causes generation of nonequilibrium magnons. Interaction between nonequilibrium magnons causes generation of THz photons.
摘要翻译： 一种太赫兹光子生成方法，包括：提供磁能增益介质; 其中所述磁能增益介质支持产生非平衡磁子; 并将非平衡电子注入到磁子增益介质中。 在非磁性增益介质中非平衡电子的传播导致产生非平衡磁子。 非平衡磁体之间的相互作用导致产生太赫兹光子。
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92.发明公开TERAHERTZ RADIATING DEVICE BASED ON SEMICONDUCTOR COUPLED QUANTUM WELLS 审中-公开太赫兹辐射加速器的基于半导体耦合量子MULDEN
公开(公告)号：EP1842242A2
公开(公告)日：2007-10-10
申请号：EP05703116.3
申请日：2005-01-20
CPC分类号： H01S1/02 , B82Y20/00 , H01L33/06 , H01S5/34 , H01S5/3419 , H01S5/3422 , H01S2302/02
摘要： A semiconductor device and method of its fabrication are provided to enable the device operation in a THz spectral range. The device comprises a heterostructure including at least first (12) and second (13) semiconductor layers. The first and second layers are made of materials providing a quantum mechanical coupling between an electron quantum well (EQW) in the first layer and a hole quantum well (HQW) in the second layer, and providing an overlap between the valence band of the material of the second layer and the conduction band of the material of the first layer. A layout of the layers is selected so as to provide a predetermined dispersion of energy subbands in the conduction band of the first layer and the valence band of the second layer. An application of an external bias field across the first and second layers causes THz radiation originating from radiative transitions of non-equilibrium carriers between at least one of the following: neighboring energy subbands of the EQW, neighboring energy subbands of the HQW, and ground energy subbands of the EQW and HQW.
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93.发明公开
公开(公告)号：EP1804347A1
公开(公告)日：2007-07-04
申请号：EP05774908.7
申请日：2005-08-23
IPC分类号： H01S1/02
CPC分类号： H01S1/02 , G02F1/3534 , G02F2203/13 , H01L31/0224 , H01L31/02327 , H01L31/09 , H01S2302/02
摘要： The present invention improves the efficiency of conversion from a non-radiation two-dimensional electron plasmon wave into a radiation electromagnetic wave, and realizes a wide-band characteristic. A terahertz electromagnetic wave radiation element of the present invention comprises a semiinsulating semiconductor bulk layer, a two-dimensional electron layer formed directly above the semiconductor bulk layer by a semiconductor heterojunction structure, source and drain electrodes electrically connected to two opposed sides of the two-dimensional electron layer, a double gate electrode grating which is provided in the vicinity of and parallel to the upper surface of the two-dimensional electron layer and for which two different dc bias potentials can be alternately set, and a transparent metal mirror provided in contact with the lower surface of the semiconductor bulk layer, formed into a film shape, functioning as a reflecting mirror in the terahertz band, and being transparent in the light wave band. Two light waves are caused to enter from the lower surface of the transparent metal mirror, and two different dc bias potentials are alternately applied to the double gate electrode grating so as to periodically modulate the electron density of the two-dimensional electron layer in accordance with the configuration of the double gate electrode grating.
摘要翻译： 本发明改善的转化从非辐射的二维电子等离子体波成辐射电磁波的效率，并实现宽带特性。 本发明的太赫兹波的电磁波辐射元件包括半绝缘半导体本体层，由半导体异质结结构，源的半导体本体层的上方直接形成和二维电子层漏电极电连接到所述双的两个相对侧 维电子层，这是在附近，并且平行地设置于二维电子层和用于两个不同的直流偏置电位上表面上的双栅极电极光栅所有可以交替地设置，并且在接触的方式设置的透明金属镜 与半导体本体层的下表面，形成为膜形状，如在太赫兹频带反射镜的作用，并且是在光波段透明的。 两个光波被使得从所述透明的金属反射镜的下表面进入，和两个不同的直流偏置电势被交替地施加到双栅电极光栅以与周期性调制雅舞蹈的二维电子层的电子密度 双栅电极光栅的配置。
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94.发明授权
公开(公告)号：EP1479137B1
公开(公告)日：2006-11-02
申请号：EP03704092.0
申请日：2003-02-18
IPC分类号： H01S3/108
CPC分类号： H01S3/1112 , H01S1/02 , H01S3/08036 , H01S3/0811 , H01S3/0816 , H01S3/1625 , H01S3/1636
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95.发明公开Method for generating a coherent electromagnetic radiation of a frequency comprised between 1 GHz and 10THz and device for implementation thereof 有权10THz及其装置 - 用于在所述频率范围的1GHz产生相干的电磁波的方法
公开(公告)号：EP1515404A2
公开(公告)日：2005-03-16
申请号：EP04380175.2
申请日：2004-08-27
IPC分类号： H01S1/06
CPC分类号： H01S1/02
摘要： Method for generating coherent electromagnetic radiation of a frequency comprised between 1 GHz and 10 THz consisting of using a sample made up of a crystalline or polycrystalline molecular magnet possessing energy levels on both sides of the magnetic anisotropy barrier, the method comprising:
subjecting the sample to a magnetic field and to a temperature in which the material displays magnetic hysteresis phenomena,
varying the magnetic field as a function of time in such a way that it provokes a phenomenon of thermal or electromagnetic avalanche which produces a population inversion, and
emitting coherent electromagnetic radiation with wavelengths λ.
The device comprises:
a housing (3) for the sample,
a generator device (2) of a magnetic field variable as a function of time,
means for maintaining said sample (1) at a temperature at which the material displays magnetic hysteresis phenomena in a magnetic field,
a temperature probe (5), and
an electromagnetic radiation detector (4).摘要翻译： 用于产生1千兆赫和10赫兹由......组成利用由的结晶或多晶分子磁铁波塞唱上的磁各向异性屏障bothsides energylevels的样品的之间包含的频率的相干的电磁辐射的方法，该方法包括：使样品经受 的磁场，并在该材料显示磁滞现象，改变在寻求一种方式的磁场作为时间的函数做了它的温度引发热或电磁雪崩现象产生粒子数反转，并且发射相干的电磁辐射 波长与拉姆达。 该装置包括：一个外壳（3）用于样品，一个发电机装置（2）的磁场变量作为时间的函数的，用于保持所述样品（1）的温度下在该材料显示磁滞现象 一个磁场，温度探针（5），和电磁辐射检测器（4）。
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96.发明公开
公开(公告)号：EP1479137A2
公开(公告)日：2004-11-24
申请号：EP03704092.0
申请日：2003-02-18
IPC分类号： H01S3/108
CPC分类号： H01S3/1112 , H01S1/02 , H01S3/08036 , H01S3/0811 , H01S3/0816 , H01S3/1625 , H01S3/1636
摘要： The invention relates to a device for generating terahertz (THz) radiation comprising a short pulse laser (1) with mode coupling to which a pump beam (3) is supplied, and comprising a semiconductor component equipped with a resonator mirror (M4). This semiconductor component serves to derive the THz radiation based on incident laser pulses. The resonator mirror (M4), preferably a resonator end mirror, is provided with a semiconductor layer (8), which is partially transparent to the laser radiation of the short pulse laser (1), whose absorption edge is lower than the energy of the laser radiation of the short pulse laser (1), and on which the electrodes (9, 10) that can be connected to a bias voltage source are placed in order to generate and radiate the THz radiation in the electric field.
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97.发明授权
公开(公告)号：EP0762565B1
公开(公告)日：2003-11-19
申请号：EP96114010.0
申请日：1996-09-02
申请人： HIROSHIMA UNIVERSITY
IPC分类号： H01S1/02
CPC分类号： H01S1/02 , G02F2/002 , G02F2203/13
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公开(公告)号：EP1273075A2
公开(公告)日：2003-01-08
申请号：EP01921759.5
申请日：2001-04-05
发明人： LEVANON, Haim, Y. , BLANK, Aharon
IPC分类号： H01S1/02
CPC分类号： H01S1/02
摘要： Optically pumped maser are described. The devices are useful for microwave amplification, microwave phase shifting and microwave limiting function. The devices are based on electron spin polarization of a stable free radical species induced by an intermolecular energy transfer process acting via a photo induced radical triplet pair mechanism. A radical triplet precursor chromophore in a matrix with the stable free radical species is irradiated, preferably using a pulsed laser to initiate the process with concomitant increase in matrix magnetic susceptibility. Microwave radiation incident on the photo activated matrix is reflected as amplified, phase shifted or limited microwave fields dependent on relevant device parameters and on the power of the incident microwave radiation.
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公开(公告)号：EP0828143A3
公开(公告)日：1998-08-26
申请号：EP97306745.7
申请日：1997-09-02
发明人： Nuss, Martin C.
CPC分类号： G01J3/42 , G01N21/3581 , G01N21/3586 , H01Q3/2676 , H01Q9/285 , H01S1/02
摘要： Optical system architectures with improved spatial resolution are provided in which the radiation useful for THz spectroscopy and other investigative procedures can be directionally coupled, in a highly efficient manner, into and out of photoconductive structures such, for example, as dipole antennas. An optical system constructed in accordance with an illustrative embodiment of the present invention comprises a source for emitting radiation in a range of frequencies within from 100 GHz to 20 THz, a coupling lens structure for coupling radiation emitted by said source into free space, at least one collimating optical element for collimating received coupled radiation into a beam having a substantially frequency independent diameter and substantially no wavefront curvature, and a detector for detecting the beam collimated by the at least one collimating optical element. In an optical system constructed in accordance with another embodiment of the present invention, a modified substrate lens structure is used and the collimating optical element is replaced by at least one optical element that focuses received coupled radiation onto a diffraction limited focal spot on or within the medium under investigation.
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公开(公告)号：EP0606776A3
公开(公告)日：1995-02-22
申请号：EP93310612.2
申请日：1993-12-30
发明人： White, Julian Darryn
CPC分类号： H01S1/02 , G02F2/002 , G02F2203/13 , H01L31/09 , H01L33/0004
摘要： A terahertz optical emission device comprises a substrate (3) with first and second electrodes (1, 2) one overlying the other with LT-GaAs dielectric material between them. When a femtosecond laser pulse is applied, terahertz radiation is produced in the plane of the substrate. A corresponding terahertz radiation detector is disclosed, together with a sensor system which uses an emitter and detector for detecting and sensing an operational parameter of a system under test.
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