前言在过去十五年到二十年内,越来越着重研究探测长波段红外辐射能量的非本征光导体。在这期间,非本征光导体已从实验室里的极少数试验品发展成为在性能要求高的红外系统中所使用的优质红外探测器。所研究的那些材料之非本征响应波段从约1微米到100微米左右,然而重点是发展8微米至25微米波段的材料。例如,主要着重研制8～14微米波段的材料,这些材料在地面大气内探 Preface In the past fifteen to twenty years, more and more emphasis has been placed on extrinsic photoconductors for detecting long-wave infrared radiation energy. In the meantime, extrinsic light conductors have evolved from a handful of laboratory labs to high-quality infrared detectors used in performance-critical infrared systems. The extrinsic response bands for those materials studied range from about 1 micron to about 100 microns, with the emphasis, however, being on the development of materials in the 8 micron to 25 micron band. For example, the main focus is the development of materials in the 8-14 micron band, these materials in the ground atmosphere exploration