Design of Q-Band loop-gap resonators at frequencies 34-36 GHz for single   electron spin spectroscopy in semiconductor nanostructures
  We report on the design of loop-gap resonators (LGR) operating in the frequency range 34-36 GHz with the goal to achieve single electron spin resonance (ESR) in quantum dot nanostructures. We present a comprehensive study of the magnetic field strength and the spatial distribution of the electric and magnetic fields in the resonator by means of experiments and numerical simulations. 
B. Simovic, P. Studerus, S. Gustavsson, R. Leturcq, K. Ensslin, R.   Schuhmann, J. Forrer, A. Schweiger