摘要:
Un élément (10) de conversion spectrale pour rayonnement électromagnétique comporte des antennes Térahertz (2) et des antennes infrarouges (3) qui sont réparties dans des zones de pixels (ZP). Les antennes Térahertz et les antennes infrarouges qui sont dans une même zone de pixel sont couplées thermiquement, et celles qui sont dans des zones de pixels différentes sont découplées. Un tel élément permet de saisir des images qui sont formées avec du rayonnement Térahertz, en utilisant un détecteur d'image (20) infrarouge.
摘要:
Die vorliegende Erfindung betrifft die Verwendung eines Photovoltaik-Elementes als Sensor zur Funktionskontrolle von Sendern im infraroten Bereich, insbesondere von Infrarot-Scheinwerfern von Kraftfahrzeugen.
摘要:
A method and apparatus for detecting infrared radiation is disclosed. The apparatus comprises a substrate (12) having readout and signal processing circuits (14) integrated therein. The substrate (12) is formed from a material selected from the group consisting of silicon, gallium arsenide, or germanium. A first semiconductor layer (28) is grown on the substrate (12) from a material selected from the group consisting of mercury-cadmium-telluride, mercury-zinc-telluride, mercury-cadmium-selenide, mercury-zinc-selenide, mercury-cadmium-sulfide, mercury-zinc-sulfide, lead-tin-telluride, lead-tin-selenide, lead-tin-sulfide, indium-arsenide-antimonide, gallium-indium-antimonide, or gallium-antimonide-arsenide. A second semiconductor layer (30) is then grown on the first semiconductor layer (28).
摘要:
The invention concerns an optical detection matrix (9) contained within a cryogenic chamber (3). Electrical image signals produced by the matrix (9) are converted into optical signals and transmitted out of the chamber (3) on lines 42A- 42T. The optical signals on lines 42A-42T are converted into electrical signals carried on line (56).
摘要:
An AlxGa1-xAs/GaAs/Al Gxa As1-x quantum well (308, 406, 408) exhibiting a bound-to-quasibound intersubband absorptive transition is described. The bound-to-quasibound transition exists when the first excited state has the same energy as the 'top' (i.e., the upper-most energy barrier) of the quantum well (308, 406, 408). The energy barrier for thermionic emission (ET) is thus equal to the energy required for intersubband absorption (EP). Increasing the energy barrier in this way reduces dark current. The amount of photocurrent generated by the quantum well (308, 406, 408) is maintained at a high level.
摘要翻译:描述了表现出准结合束带间吸收跃迁的Al x Ga 1-x As / GaAs / Al G x As 1-x量子阱(308,406,408)。 当第一激发态具有与量子阱(308,406,408)的“顶部”(即,最高能量势垒)相同的能量时,存在束缚 - 准束耦合转变。 热电子发射(ET)的能垒因此等于子带间吸收(EP)所需的能量。 以这种方式增加能量障碍减少暗电流。 量子阱(308,406,408)产生的光电流量保持在高水平。
摘要:
Disclosed is a radiation detector which includes at least one photoconductive detector (6) and a modulator (2), which modulates in an on-off manner radiation passing to the photoconductive detector (6) from a radiation source (4). A bias source (8) is connected to one terminal of the photoconductive detector (6). A first amplifier (17) is connected to the other terminal of the photoconductive detector (6), and a second amplifier (34) receives an output of the first amplifier (17). A first phase detector (36) detects the phase of modulation of the radiation source (4) by the modulator (2) and generates a reference signal relating thereto. A switch (34) in the second amplifier (24) changes, in response to the reference signal generated by the first phase detector (36), the second amplifier between an inverting state and a non-inverting state as the modulator (2) changes the phase of modulation of the radiation.