The Role of Self-Similarity in Fractal Photoconductive THz Emitters

Abstract

We present the effect of self-similarity in fractal photoconductive THz emitters. The performance of fractal THz PC emitters are compared to those of non-fractal emitters, and their radiation properties are studied. It is demonstrated that the THz radiation emission enhancement results from the inherent fractal self-similarity and not only from the sub-wavelength apertures pattern present on the antenna’s surface. Through the application of this concept, photoconductive THz emitters having higher THz radiation power could be designed and fabricated.