CST – Computer Simulation Technology

Strongly driven electron spins using a Ku band stripline electron paramagnetic resonance resonator
Yung Szen Yap, Hiroshi Yamamoto, Yutaka Tabuchi, Makoto Negoro, Akinori Kagawa, Masahiro Kitagawa
Journal of Magnetic Resonance
Volume: 232, July 2013
EPR, ESR, Resonator, Stripline, Rabi frequency, Spin excitation, Spin nutation, Rabi oscillation
This article details our work to obtain strong excitation for electron paramagnetic resonance (EPR) experiments by improving the resonator’s efficiency. The advantages and application of strong excitation are discussed. Two 17 GHz transmission-type, stripline resonators were designed, simulated and fabricated. Scattering parameter measurements were carried out and quality factor were measured to be around 160 and 85. Simulation results of the microwave’s magnetic field distribution are also presented. To determine the excitation field at the sample, nutation experiments were carried out and power dependence were measured using two organic samples at room temperature. The highest recorded Rabi frequency was rated at 210 MHz with an input power of about 1W, which corresponds to a pi/2 pulse of about 1.2 ns.

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