Rabi oscillation and electron-spin-echo envelope modulation of the photoexcited triplet spin system in silicon
Rabi oscillation and electron-spin-echo envelope modulation of the photoexcited triplet spin system in silicon
复制标题
硅中光激发三重态自旋系统的拉比振荡和电子自旋回波包络调制
DOI：
10.1103/physrevb.86.115206
复制
发表时间：
2012
影响因子：
3.7
通讯作者：
Akhtar W
中科院分区：
文献类型：
--
作者：
Akhtar W
本文报道了用脉冲电子顺磁共振(EPR)研究硅中氧空位中心的光激发三重态。利用共振微波脉冲的相干操控，观察到了三重态子能级之间的拉比振荡。哈恩回波和受激回波衰减曲线与被称为电子自旋回波包络调制(ESEEM)的强调制叠加。ESEEM谱揭示了三重态电子自旋和位于附近晶格位置的ASI核自旋()之间的弱而各向异性的超精细耦合，这在常规的扫描EPR谱中是不能分辨的。
We report on a pulsed electron paramagnetic resonance (EPR) study of the photoexcited triplet state () of oxygen-vacancy centers in silicon. Rabi oscillations between the triplet sublevels are observed using coherent manipulation with a resonant microwave pulse. The Hahn echo and stimulated echo decay profiles are superimposed with strong modulations known as electron-spin-echo envelope modulation (ESEEM). The ESEEM spectra reveal a weak but anisotropic hyperfine coupling between the triplet electron spin and aSi nuclear spin () residing at a nearby lattice site, that cannot be resolved in conventional field-swept EPR spectra.