Electron paramagnetic resonance spectroscopy of Er3+:Y2SiO5 using a Josephson bifurcation amplifier: Observation of hyperfine and quadrupole structures
Electron paramagnetic resonance spectroscopy of Er3+:Y2SiO5 using a Josephson bifurcation amplifier: Observation of hyperfine and quadrupole structures
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DOI：
10.1103/physrevmaterials.2.011403
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发表时间：
2018-01-30
影响因子：
3.4
通讯作者：
Saito, Shiro
中科院分区：
文献类型：
--
作者：
Budoyo, Rangga P.;Kakuyanagi, Kosuke;Saito, Shiro
我们通过观察可调谐约瑟夫森分叉放大器的直流超导量子干涉装置（dc SQUID）回路上感应的通量变化，对 Er3+ 掺杂的 Y2SiO5 晶体进行了磁场和频率可调谐电子顺磁共振波谱分析。考虑到 Er-167 的超精细和四极相互作用，观察到的光谱显示出与模拟能级非常吻合的多个跃迁。传感体积约为 0.15 pl，我们推断的测量灵敏度（受外部通量噪声限制）约为 1.5 x 10(4) 个电子自旋（对于 1 秒测量）。灵敏度值比使用直流 SQUID 开关读数的类似方案好两个数量级。
We performed magnetic field and frequency tunable electron paramagnetic resonance spectroscopy of an Er3+-doped Y2SiO5 crystal by observing the change in flux induced on a direct current superconducting quantum interference device (dc SQUID) loop of a tunable Josephson bifurcation amplifer. The observed spectra show multiple transitions which agree well with the simulated energy levels, taking into account the hyperfine and quadrupole interactions of Er-167. The sensing volume is about 0.15 pl, and our inferred measurement sensitivity (limited by external flux noise) is approximately 1.5 x 10(4) electron spins for a 1-s measurement. The sensitivity value is two orders of magnitude better than similar schemes using a dc SQUID switching readout.