Optimizing Resonator Coupling for Bimodal Electron Spin Resonance

Molecular Nanomagnets (MNMs) have great potential as a platform for quantum computing, with one promising approach being heterodimers of MNMs. Bimodal Electron Spin Resonance (ESR) is the means through which we will interact with a heterodimer of MNMs to ultimately perform multiqubit operations. In our system, two antennas are used to interact with a bimodal Loop-Gap Resonator (LGR) and pick up each resonance independently. Ideally, we need to be able to alter the coupling between the LGR and the antennas in situ, but ideal bimodal antenna configurations are not known, and the bimodal resonator geometry is unique to our system. We will present our work improving the bimodal antenna-resonator coupling and its impacts on our bimodal ESR.