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    • 4. 发明授权
    • Heterostructure thermionic coolers
    • 异质结构热离子冷却器
    • US06323414B1
    • 2001-11-27
    • US09548011
    • 2000-04-12
    • Ali ShakouriJohn E. Bowers
    • Ali ShakouriJohn E. Bowers
    • H01L3530
    • H01L29/861H01L29/205H01L29/267
    • A heterostructure thermionic cooler and a method for making thermionic coolers, employing a barrier layer of varying conduction bandedge for n-type material, or varying valence bandedge for p-type material, that is placed between two layers of material. The barrier layer has a high enough barrier for the cold side to only allow “hot” electrons, or electrons of high enough energy, across the barrier. The barrier layer is constructed to have an internal electric field such that the electrons that make it over the initial barrier are assisted in travel to the anode. Once electrons drop to the energy level of the anode, they lose energy to the lattice, thus heating the lattice at the anode. The barrier height of the barrier layer is high enough to prevent the electrons from traveling in the reverse direction.
    • 异质结构热离子冷却器和用于制造热离子冷却器的方法,使用放置在两层材料之间的用于n型材料的变化的导带的阻挡层或用于p型材料的变化的带状带。 阻挡层具有足够高的阻挡层,用于冷侧仅允许穿过屏障的“热”电子或足够高能量的电子。 阻挡层被构造成具有内部电场,使得使其超过初始屏障的电子被辅助到行进到阳极。 一旦电子下降到阳极的能级,它们就会失去晶格的能量,从而在阳极处加热晶格。 阻挡层的势垒高度足够高以防止电子沿相反方向传播。
    • 8. 发明授权
    • Fiber optic sensor for detecting very small displacements of a surface
    • 用于检测表面极小位移的光纤传感器
    • US4572949A
    • 1986-02-25
    • US565091
    • 1983-12-14
    • John E. BowersGordon S. Kino
    • John E. BowersGordon S. Kino
    • G01D5/26G01H9/00H01J5/16
    • G01H9/006G01D5/268
    • A light source (10) coupled to a first fiber optic waveguide (14) which is coupled by a first directional coupler (22) and a second directional coupler (24) to a second waveguide (20). The first waveguide (14) has a phase modulator (60), a delay loop (62) and a polarization controller (68) therein to cause a differential delay time T on counterpropagating coherent light waves phase modulated at a frequency 1.sub.M. The first directional coupler (22) has one part connected to a photodector (28) and the second directional coupler (24) has a probe (20D) coupled to the first fiber (14) and the second fiber (20). The probe directs light toward a surface (18) whereupon the counterpropagating waves are shifted in phase by an amount proportional to the amplitude of displacement of the surface 18.
    • PCT No.PCT / US83 / 00533 Sec。 371日期:1983年12月14日 102(e)1983年12月14日日期PCT提交1983年4月13日PCT公布。 出版物WO83 / 03684 日期:1983年10月27日。耦合到第一光纤波导(14)的光源(10),第一光纤波导(14)由第一定向耦合器(22)和第二定向耦合器(24)耦合到第二波导(20)。 第一波导(14)在其中具有相位调制器(60),延迟环(62)和偏振控制器(68),以在以1M频率相位调制的反向传播相干光波上产生差分延迟时间T. 第一定向耦合器(22)具有连接到光电二极管(28)的一部分,而第二定向耦合器(24)具有耦合到第一光纤(14)和第二光纤(20)的探针(20D)。 探针将光朝着表面(18)引导,于是反向传播波相移一个与表面18的位移幅度成比例的量。