Hrubesch F M, Braunbeck G, Voss A, Stutzmann M, Brandt M S
Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany.
J Magn Reson. 2015 May;254:62-9. doi: 10.1016/j.jmr.2015.02.010. Epub 2015 Mar 7.
We present a broadband microwave setup for electrically detected magnetic resonance (EDMR) based on microwave antennae with the ability to apply arbitrarily shaped pulses for the excitation of electron spin resonance (ESR) and nuclear magnetic resonance (NMR) of spin ensembles. This setup uses non-resonant stripline structures for on-chip microwave delivery and is demonstrated to work in the frequency range from 4 MHz to 18 GHz. π pulse times of 50 ns and 70 μs for ESR and NMR transitions, respectively, are achieved with as little as 100 mW of microwave or radiofrequency power. The use of adiabatic pulses fully compensates for the microwave magnetic field inhomogeneity of the stripline antennae, as demonstrated with the help of BIR4 unitary rotation pulses driving the ESR transition of neutral phosphorus donors in silicon and the NMR transitions of ionized phosphorus donors as detected by electron nuclear double resonance (ENDOR).
我们展示了一种基于微波天线的宽带微波装置，用于电检测磁共振（EDMR），该装置能够施加任意形状的脉冲来激发自旋系综的电子自旋共振（ESR）和核磁共振（NMR）。此装置使用非谐振带状线结构进行片上微波传输，并已证明其在4 MHz至18 GHz的频率范围内工作。通过仅100 mW的微波或射频功率，分别实现了ESR和NMR跃迁的π脉冲时间为50 ns和70 μs。如借助驱动硅中中性磷施主的ESR跃迁的BIR4幺正旋转脉冲以及通过电子核双共振（ENDOR）检测的电离磷施主的NMR跃迁所证明的那样，绝热脉冲的使用完全补偿了带状线天线的微波磁场不均匀性。
