High-field optically detected nuclear magnetic resonance in GaAs
High-field optically detected nuclear magnetic resonance in GaAs
复制标题
GaAs 中的高场光学检测核磁共振
DOI：
10.1063/1.1923191
复制
发表时间：
2005
影响因子：
4
通讯作者：
D. Awschalom
中科院分区：
文献类型：
--
作者：
M. Poggio;D. Awschalom
发展了一种高场光探测核磁共振（ODNMR）方法，灵敏度可达108个核。利用射频线圈诱导核自旋跃迁，并通过法拉第旋转光谱检测。与传统的ODMMR不同，ODMMR仅限于低场，依赖于时间平均发光极化的测量，该技术通过电子自旋动力学的时间分辨测量来监测核极化。在（110）GaAs量子阱中的测量揭示了Ga 69，Ga 71和As 75共振及其四极分裂，同时解决了0.02%的核极化变化。
A method for high-field optically detected nuclear magnetic resonance (ODNMR) is developed sensitive to 108 nuclei. Nuclear spin transitions are induced using a radio frequency coil and detected through Faraday rotation spectroscopy. Unlike conventional ODNMR, which is limited to low fields and relies on the measurement of time-averaged luminescence polarization, this technique monitors nuclear polarization through time-resolved measurements of electron spin dynamics. Measurements in a (110) GaAs quantum well reveal Ga69, Ga71, and As75 resonances and their quadrupolar splittings while resolving changes in nuclear polarization of 0.02%.