公开(公告)号：US5079601A

公开(公告)日：1992-01-07

申请号：US453634

申请日：1989-12-20

申请人： Leo Esaki ,  Hideo Ohno ,  Emilio E. Mendez

发明人： Leo Esaki ,  Hideo Ohno ,  Emilio E. Mendez

IPC分类号： H01L31/0352 ,  H01L31/10 ,  H01L33/06 ,  H01S5/00 ,  H01S5/062 ,  H01S5/34 ,  H01S5/343

CPC分类号： H01L33/06 ,  B82Y20/00 ,  H01L31/0352 ,  H01S5/34 ,  H01S5/06203 ,  H01S5/06206 ,  H01S5/3402 ,  H01S5/3418 ,  H01S5/3419 ,  H01S5/3422 ,  H01S5/34306

摘要： The present invention is directed to novel optoelectronic devices, such as light emitters and detectors, that have a unique combination of semiconductor materials that provides a band arrangement resulting in improved efficiency of carrier injection. The devices are quantum well type devices in which discrete electronic states are formed by size quantization effects in the quantum well region. Electromagnetic radiation of emission and absorption occurs by the transition of electrons from a first energy state to a second energy state in either the conduction band or the valence band of the quantum well layer. The bands edges of the layers are offset such that under an appropriate bias, the discrete energy states reside in the bandgap of one of the electrodes and in an allowed region of the other electrode, with one state residing in the conduction band of one electrode and the other state residing in the valence band of the other electrode. The wavelength of the emitted or detected light is inversely proportional to the energy difference between the first and second states. Wavelength customization is facilitated by techniques for adjusting the energy difference.

公开(公告)号：US4743951A

公开(公告)日：1988-05-10

申请号：US355942

申请日：1982-03-08

申请人： Chin-An Chang ,  Leroy L. Chang ,  Leo Esaki ,  Emilio E. Mendez

发明人： Chin-An Chang ,  Leroy L. Chang ,  Leo Esaki ,  Emilio E. Mendez

IPC分类号： H01L29/778 ,  H01L29/80

CPC分类号： H01L29/7783

摘要： The mobility of carriers in the channel region of a field effect transistor can be increased by providing a layered structure wherein electrons are separated from impurities. The channel is made up of external layers of wide bandgap material and internal layers with a narrower bandgap where the bottom of the conduction band of one layer is below the top of the valence band of the adjacent layer. A structure is shown with a layered channel having AlSb external layers and at least one or both of InAs and GaSb internal layers.

摘要翻译： 可以通过提供其中电子与杂质分离的分层结构来增加场效应晶体管的沟道区中载流子的迁移率。 通道由宽带隙材料的外层和具有较窄带隙的内层组成，其中一层的导带的底部低于相邻层的价带的顶部。 显示了具有AlSb外层和InAs和GaSb内层中的至少一个或两者的层状沟道的结构。

公开(公告)号：US5287377A

公开(公告)日：1994-02-15

申请号：US58997

申请日：1993-05-06

申请人： Tadashi Fukuzawa ,  Ling Y. Liu ,  Emilio E. Mendez

发明人： Tadashi Fukuzawa ,  Ling Y. Liu ,  Emilio E. Mendez

IPC分类号： H01S5/00 ,  H01S3/0941 ,  H01S5/026 ,  H01S5/04 ,  H01S5/042 ,  H01S5/06 ,  H01S5/062 ,  H01S5/34 ,  H01S3/19

CPC分类号： B82Y20/00 ,  H01S3/0941 ,  H01S5/041 ,  H01S5/06203 ,  H01S5/026 ,  H01S5/0614 ,  H01S5/06206 ,  H01S5/06213 ,  H01S5/0622 ,  H01S5/3425

摘要： The present invention is the use of coupled quantum wells in the active region of a semiconductor laser to modulate the frequency and amplitude of the light output of the laser. In a particular embodiment of the present invention the coupled quantum wells are contained in a graded index of refraction semiconductor double heterostructure laser. The active region of this tunable laser consists of two quantum wells having a width of approximately 50 Angstroms or less which are separated by a barrier layer having a width of approximately 20 Angstroms or less. The quantum well material is intrinsic GaAs and the barrier layer is Al.sub.x Ga.sub.1-x As wherein x=0.23. The active region is surrounded by the double heterostructure in which one side is doped p-type and the second side is doped n-type. The resulting laser is a p-i-n type structure. A reverse bias with respect to the flat band voltage of the p-i-n structure is applied across the p-i-n structure which modulates both the frequency and the intensity of the laser output. The tunable laser is pumped with a variety of conventional means, including both electrical and optical pumping. The modulation of the wavelength is approximately linear over a 1.5 volt operating range. A tunable laser, such as the present invention, having an output wavelength modulated by an electric field is useful in the field of optical communications and computing.

摘要翻译： 本发明是在半导体激光器的有源区域中使用耦合量子阱来调制激光器的光输出的频率和幅度。 在本发明的特定实施例中，耦合的量子阱包含在渐变折射率半导体双异质结构激光器中。 该可调谐激光器的有源区域由宽度约为50埃或更小的两个量子阱组成，该量子阱由宽度约为20埃或更小的阻挡层隔开。 量子阱材料是本征GaAs，势垒层是Al x Ga 1-x As，其中x = 0.23。 有源区被双异质结构包围，其中一侧掺杂p型，第二面掺杂n型。 所得到的激光器是p-i-n型结构。 相对于p-i-n结构的平带电压的反向偏压被施加在p-i-n结构上，该p-i-n结构调制激光输出的频率和强度。 可调谐激光器以各种常规手段进行泵送，包括电泵浦和光泵浦。 在1.5伏工作范围内，波长的调制近似线性。 具有由电场调制的输出波长的本发明的可调谐激光器在光通信和计算领域是有用的。

公开(公告)号：US5132746A

公开(公告)日：1992-07-21

申请号：US637397

申请日：1991-01-04

申请人： Emilio E. Mendez ,  Theoren P. Smith, III ,  Jerry M. Woodall

发明人： Emilio E. Mendez ,  Theoren P. Smith, III ,  Jerry M. Woodall

IPC分类号： H01L29/205 ,  H01L29/12 ,  H01L29/737 ,  H01L29/76 ,  H01L29/88 ,  H01L31/10

CPC分类号： B82Y10/00 ,  H01L29/122 ,  H01L29/7376 ,  H01L29/7606

摘要： Resonant tunneling devices having improved peak-to-valley current ratios are disclosed. The resonant tunneling device comprises a quantum well layer surrounded by first and second barrier layers, the first and second barrier layers being comprised of an indirect first III-V compound semiconductor. The first barrier layer being formed on a substrate of a second III-V compound semiconductor having a lattice constant larger than the lattice constant of the first barrier layer thereby inducing a biaxial stress in the first barrier layer. The biaxial stress results in an energy shift at resonance that increases the peak to valley current ratio of the device.

公开(公告)号：US5079774A

公开(公告)日：1992-01-07

申请号：US634647

申请日：1990-12-27

申请人： Emilio E. Mendez ,  Doyeol Ahn

发明人： Emilio E. Mendez ,  Doyeol Ahn

IPC分类号： H01L33/06 ,  H01S5/00 ,  H01S5/042 ,  H01S5/06 ,  H01S5/062 ,  H01S5/20 ,  H01S5/227 ,  H01S5/34

CPC分类号： H01L33/06 ,  B82Y20/00 ,  H01S5/06203 ,  H01S5/20 ,  H01S5/34 ,  H01S5/0424 ,  H01S5/06236 ,  H01S5/2059 ,  H01S5/227 ,  H01S5/2275 ,  H01S5/3403 ,  H01S5/3404

摘要： A strained-layer quantum well (QW) or multi-quantum well (MQW) semiconductor laser device (10) having a polarization that is switchable between the TE and the TM modes by an electric field that is externally applied, via an electrode (22) perpendicularly to the layer (16) or layers of the quantum well. The polarization switching is a direct consequence of a valence-band reversal induced by the electric field in the strained-layer quantum well. An inversion population is maintained during the switching process, resulting in rapid switching times.

公开(公告)号：US4538165A

公开(公告)日：1985-08-27

申请号：US586497

申请日：1984-03-05

申请人： Chin-An Chang ,  Leroy L. Chang ,  Leo Esaki ,  Emilio E. Mendez

发明人： Chin-An Chang ,  Leroy L. Chang ,  Leo Esaki ,  Emilio E. Mendez

IPC分类号： H01L29/10 ,  H01L29/43 ,  H01L29/778 ,  H01L29/80 ,  H01L29/205

CPC分类号： H01L29/432 ,  H01L29/1029 ,  H01L29/7783

摘要： The mobility of carriers in the channel region of a field effect transistor can be increased by providing a layered structure wherein electrons are separated from impurities. The channel is made up of external layers of wide bandgap material and internal layers with a narrower bandgap where the bottom of the conduction band of one layer is below the top of the valence band of the adjacent layer. A structure is shown with a layered channel having AlSb external layers and at least one or both of InAs and GaSb internal layers.

摘要翻译： 可以通过提供其中电子与杂质分离的分层结构来增加场效应晶体管的沟道区中载流子的迁移率。 通道由宽带隙材料的外层和具有较窄带隙的内层组成，其中一层的导带的底部低于相邻层的价带的顶部。 显示了具有AlSb外层和InAs和GaSb内层中的至少一个或两者的层状沟道的结构。