ck of effi- cient terahertz sources and detectors. In recent years, the advancement of terahertz signal generation, detection, communication, and imaging-based applications can be seen [Elayan, Amin, Shihada, Shubair, & Alouini (2019)]. Based on electronic and photonic technology developments, terahertz transceiver design research is advan- cing day-by-day. The electronic technology to generate the terahertz power has superior advantages in producing the high power while the photonic technologies provide better data rates. The electronic platforms generate THz signals using CMOS technology whereas in the photonic technologies, the photoconductive antennas, quantum cascade lasers, optical down conversion systems and uni-traveling carrier photodiodes support generation beyond 300 GHz frequencies [Kenneth et al. (2019)]. Terahertz Antenna in Future Healthcare Informatics By the integration of hybrid electronic and photonic technology systems, terahertz devices can be designed to have high performance. The high electron mobility, recon- figurable and compact antenna array designs can be attained with plasmonic antennas through the surface plasmon polariton waves in the interface. The signal to noise ratio (SNR) of the THz signal is a very important parameter in the study of biological sample substances. Due to the unavailability of powerful THz sources and detectors, SNR remains low while using THz technology in the medical field. Many research works have been carried out to improve THz sources and to increase the sensitivity of the detectors to obtain high THz SNR. Attenuated total reflection (ATR) spectros- copy is proposed to measure the water content in human skin, but cannot enhance the resonance of target biological substances and is sensitive to few biological samples. Metamaterials can also be used as a sensitive biosensor for the analysis but the fre- quency range is limited to the metamaterial Fermi level [S.-H. Lee et al. (2020)]. A nano slit with mixed graphene gold electrode can also be used to enhance t