Optical dielectric resonator antenna

In this paper we propose that a dielectric dot on the top of a ground plane could act as an antenna in optical frequency range. We investigate its electromagnetic properties numerically and observe that its behaviors are similar to dielectric resonator antenna in radio frequency. Further we optimize the aspect ratio of optical dielectric resonator antenna based on return loss, study the fundamental resonant frequency for different dielectric constant, and verify the array pattern multiplication for proposed optical antenna. Using the array of optical dielectric resonator antenna, we could achieve high directivity. We believe that optical dielectric resonator antenna could open new possibilities to study the novel phenomenon of light matter interaction. To the best of our knowledge, this is the first report of dielectric resonator antenna in optical frequencies.