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通过采用一种特殊的半导体材料,同样的红外相机现在已能以高分辨率探测能量小于十分之一电子伏特的两个波段的光。通过使用一种叫做Ⅱ型超晶格的半导体材料,常用于夜视的红外传感技术的能力已增强到能快速看见较冷的目标,而且其价格有可能会变得更加便宜。Ⅱ型超晶格材料的妙处在于其在红外区域改变探测波长比较容易。实验证明其波长可在3μm到30μm间调节。在相间排列的InAs和GaSb量子阱中,电子和空穴(分别为负
By using a special semiconductor material, the same infrared camera can now detect light at two bands of energy less than one tenth of an electron volt at high resolution. By using a semiconductor material called Type II superlattice, the ability of infrared sensing, which is commonly used for night vision, has been enhanced to quickly see colder targets and is likely to become cheaper. The beauty of Type II superlattice materials is that it is easier to change the detection wavelength in the infrared region. Experiments show that its wavelength can be adjusted between 3μm to 30μm. In the intercalated InAs and GaSb quantum wells, electrons and holes (negative, respectively