Study the Effect of Change the Antenna Length on the Performance of Optical Nano Antenna Using Plasmonic Surfaces

This study aims to find out the effect of increasing the length of the arm of the antenna on the amount of electric and magnetic fields generated between the ends of optical nano antenna and choose the best values, We have been using optiFDTD program to test the effect of change the length of the arms of the antenna on the electric and magnetic fields generated , The results show that the electric and magnetic fields inside the antenna have increased when the length of the arm of the antenna decreased, while the penetration and reflection fields have an increased when the length of the antenna arm increased. Therefore, we can concluded that the decrease in the length of the antenna arm enhancement the reflection and dispersion field generated between the antenna on both ends of the domain account.