Slotting effect in designing circular edge bow-tie nano antenna for energy harvesting

Recent years has observed a remarkable progress in the field of energy harvesting via nano antenna which is nowday´s most challenging aspects to reduce the excessive use of fossil fuel. This paper presents a circular edged bow-tie shaped nano antenna used for solar energy harvesting. The performance of the designed nano antenna has been investigated without slot, and also with single and double slots. An optimum performance comparison of the designed nano-antenna with different slot structure is studied via FDTD (Finite difference time domain) method to generate electricity from the radiated maximum solar and earth energy. The results demonstrate that the bow-tie nano antenna having double slot in the circular edge provides better electric field than nano-antenna with single slot or without slot. Moreover, highly localized electric fields are found in the gap between bow-tie tips through the characterization of surface Plasmon resonance. Compared to the other structures, the double slotted circular edged bow-tie nano antenna provides broader antenna bandwidth. The electric field of the bow-tie antenna can also be improved with the array coupling of more bow-tie elements.