论文标题
量子限制光谱仪中的超细光谱仪
Hyperfine spectroscopy in a quantum-limited spectrometer
论文作者
论文摘要
我们报告了基于超导微谐振器的定制高敏化光谱仪，在Millikelvin温度下以Millikelvin温度执行的电子自旋回声包膜调制（ESEEM）的测量值。谐振器的高质量因子和较小的模式体积（降至0.2PL）可以探测少量的旋转，低至$ 5 \ cdot 10^2 $。 We measure 2-pulse ESEEM on two systems: erbium ions coupled to $^{183}$W nuclei in a natural-abundance $\text{CaWO}_4$ crystal, and bismuth donors coupled to residual $^{29}$Si nuclei in a silicon substrate that was isotopically enriched in the $^{28}$Si同位素。我们还为硅中的二晶型供体测量了3和5脉冲ESEEM。对于近端核的超精细偶联强度和核自旋浓度，获得了定量一致。
We report measurements of electron spin echo envelope modulation (ESEEM) performed at millikelvin temperatures in a custom-built high-sensitivity spectrometer based on superconducting micro-resonators. The high quality factor and small mode volume (down to 0.2pL) of the resonator allow to probe a small number of spins, down to $5\cdot 10^2$. We measure 2-pulse ESEEM on two systems: erbium ions coupled to $^{183}$W nuclei in a natural-abundance $\text{CaWO}_4$ crystal, and bismuth donors coupled to residual $^{29}$Si nuclei in a silicon substrate that was isotopically enriched in the $^{28}$Si isotope. We also measure 3- and 5-pulse ESEEM for the bismuth donors in silicon. Quantitative agreement is obtained for both the hyperfine coupling strength of proximal nuclei, and the nuclear spin concentration.
