论文标题
自旋回波的微波荧光检测
Microwave fluorescence detection of spin echoes
论文作者
论文摘要
最近提出，将微波光子辐射出辐射性时，将它们作为电子传播磁共振共振（EPR）光谱的灵敏方法的计算，这是通过Millikelvin温度下的操作单微波光子检测器（SMPD）的开发来启用的。在这里，我们报告了自旋荧光信号中自旋回波的检测。回声表现为对$π/2_x -τ-π_y -τ-π/2_φ$序列自发发射的光子数量的连贯调制，取决于相对相位$φ$。我们使用$ \ mathrm {er}^{3+} $ ion spins of $ \ mathrm {cawo} _4 $的$ \ mathrm {er}^{er}^{3+} $ ion spins of实验证明这种检测方法。我们使用荧光检测的回声来测量ERBIUM自旋相干时间以及由于与$^{183} \ MATHRM {W} $核旋转每个离子周围的耦合而导致的回声信封调制。我们最终比较了电感检测和荧光检测的回声的信噪比，并证明其使用荧光方法更大。
Counting the microwave photons emitted by an ensemble of electron spins when they relax radiatively has recently been proposed as a sensitive method for electron paramagnetic resonance (EPR) spectroscopy, enabled by the development of operational Single Microwave Photon Detectors (SMPD) at millikelvin temperature. Here, we report the detection of spin echoes in the spin fluorescence signal. The echo manifests itself as a coherent modulation of the number of photons spontaneously emitted after a $π/2_X - τ- π_Y - τ- π/2_Φ$ sequence, dependent on the relative phase $Φ$. We demonstrate experimentally this detection method using an ensemble of $\mathrm{Er}^{3+}$ ion spins in a scheelite crystal of $\mathrm{CaWO}_4$. We use fluorescence-detected echoes to measure the erbium spin coherence time, as well as the echo envelope modulation due to the coupling to the $^{183}\mathrm{W}$ nuclear spins surrounding each ion. We finally compare the signal-to-noise ratio of inductively-detected and fluorescence-detected echoes, and show that it is larger with the fluorescence method.
