| 摘要 |
The present invention addresses the problem of providing a photoconductive substrate, which can improve the S/N ratio or the dynamic range of electromagnetic waves to be generated, and an electromagnetic wave generating apparatus that is provided with the photoconductive substrate. A photoconductive substrate (2) is characterized in that: the photoconductive substrate is provided with a substrate (11), and a photoconductive layer (13), which is configured of a III-V compound semiconductor that is epitaxially grown on the substrate (11); and in the photoconductive layer (13), the lifetime of a carrier generated due to photoelectric effects is within a range wherein the lower limit is higher than a subpicosecond, and the upper limit maintains presence of a cluster of the group V atoms, specifically, the carrier lifetime is 2-50 psec. |
