论文标题
用于快速核自旋控制的高带宽微型机油
High-bandwidth microcoil for fast nuclear spin control
论文作者
论文摘要
用射频（RF）线圈对核自旋的主动操纵是核磁共振（NMR）光谱和基于自旋的量子设备的核心。在这里，我们提出了一个旨在在宽带宽度上产生强的RF脉冲的微型机油发射器系统，从而可以在任意核物种上快速自旋旋转。我们的设计结合了：（i）平面多层几何形状，该几何形状产生4.35吨单位电流的大型场，（ii）50欧姆的传输电路，其宽带刺激带宽约为20 MHz，并且（iii）优化的热管理，用于去除焦点加热。在3.4 US内，使用单个13C核自旋作为测试系统，以钻石氮散布（NV）中心作为测试系统，在3.4 US内表明了超过70 kHz和核PI/2旋转的狂犬病频率。 1H旋转的外推值分别为240 kHz和1 US。除了启用快速核自旋操作外，我们的微型机油系统非常适合将晚期脉冲序列掺入以低（<1 t）磁场运行的微观和纳米级NMR检测器。
The active manipulation of nuclear spins with radio-frequency (RF) coils is at the heart of nuclear magnetic resonance (NMR) spectroscopy and spin-based quantum devices. Here, we present a microcoil transmitter system designed to generate strong RF pulses over a broad bandwidth, allowing for fast spin rotations on arbitrary nuclear species. Our design incorporates: (i) a planar multilayer geometry that generates a large field of 4.35 mT per unit current, (ii) a 50 Ohm transmission circuit with a broad excitation bandwidth of approximately 20 MHz, and (iii) an optimized thermal management for removal of Joule heating. Using individual 13C nuclear spins in the vicinity of a diamond nitrogen-vacancy (NV) center as a test system, we demonstrate Rabi frequencies exceeding 70 kHz and nuclear pi/2 rotations within 3.4 us. The extrapolated values for 1H spins are about 240 kHz and 1 us, respectively. Beyond enabling fast nuclear spin manipulations, our microcoil system is ideally suited for the incorporation of advanced pulse sequences into micro- and nanoscale NMR detectors operating at low (<1 T) magnetic field.
