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引言碲镉汞合金系原来是作为有可能得到长波长的红外探测器材料,特别是用于8～14微米大气窗的材料来进行研究的。这种技术已进展到可以正规生产背景限制探测器和阵列。这种探测器与其他类型(即锗掺杂型)的器件相比,一个很大优点是在77°K工作。然而,这种合金系的一个更大的优点是波长响应可以调节。由于HgTe和CdTe在整个组分范围内都可以混合,因此可以制备截止波长由0.8～30微米以上的探测器。实际上,已制成了1.5～35微米范围的探测器。
Introduction The cadmium telluride amalgam system was originally studied as a possible long wavelength infrared detector material, especially for the 8-14 micron window of the atmosphere. This technique has evolved to allow formal production of background-limited detectors and arrays. One of the great advantages of this detector compared to other types of devices (germanium-doped) is that it operates at 77 ° K. However, a greater advantage of this alloy system is that the wavelength response can be adjusted. Since HgTe and CdTe can be mixed in the entire composition range, it is possible to prepare a detector having a cutoff wavelength of 0.8 to 30 μm or more. In fact, detectors in the 1.5 to 35 micron range have been made.