We report on a comprehensive investigation of radiation characteristics of THz emitters using structures based on the
Sierpinski fractal. Self-similarity present in the geometrical properties of these antennas improves the coupling of
emitted radiation to free space. Using THz-TDS it is shown that these novel antennas produce higher radiation power
when compared to the bow-tie antenna. To the best of our knowledge this is the first time that Sierpinski fractal antennas
have been used as emitters for generating THz radiation.
The application of THz plasmonics in imaging dielectric objects embedded in the metallic media is presented.
Signatures of the embedded object was detected when the time domain information of the transmitted pulse was
analyzed by THz time domain spectroscopy. The resolution of the acquired images was enhanced by using a super-resolution
image processing technique. It is further shown that the images acquired from the pulse arrival time and
phase magnitude reveal more details of the embedded object compared to the pulse power information.