Split-post dielectric resonator plasma generators

Recently, it has been shown that microplasmas can be generated via the use of split-ring-resonator metamaterial structures. However, it has been suggested that high Q-factors may lead to even more efficient microplasma generation1. This inspired the use of dielectric resonators with high Q-factors to generate plasmas. Unlike all previous plasma generators, dielectric resonator plasma generators may be ideal for interaction with high-frequency electromagnetic radiation since conductor losses can be eliminated or minimized. In addition, the dielectric resonator can enhance the electric field via dielectric contrast. One potential application is to use low-loss dielectrics to generate plasmas which may then act as metamaterials for GHz-THz radiation. The electromagnetic properties of plasmas can be tuned rapidly via changing external parameters such as input power and pressure, which makes them an interesting candidate for tunable metamaterials. We explore the properties of dielectric resonator plasma generators as well as the plasmas which are generated by the resonators. In addition, the use of low work function thin films is explored in order to enhance plasma generation properties and reduce damage to the dielectrics.