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Theory of nonlinear optical spectroscopy of electron spin coherence in quantum dots

机译:量子点中电子自旋相干的非线性光谱理论

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We study in theory the generation and detection of electron spin coherence in nonlinear optical spectroscopy of semiconductor quantum dots doped with single electrons. In third-order differential transmission spectra, the inverse width of the ultranarrow peak at degenerate pump and probe frequencies gives the longitudinal spin relaxation time (T_1), and that of the Stokes and anti-Stokes spin resonances gives the spin dephasing time including the inhomogeneous broadening (T_2~*). The transverse spin relaxation time excluding the inhomoge-neous broadening effect (T_2) can be measured by the inverse width of ultranarrow hole-burning resonances in fifth-order differential transmission spectra.
机译:我们在理论上研究了掺杂单电子的半导体量子点在非线性光谱学中电子自旋相干的产生和检测。在三阶微分透射光谱中,简并的泵浦频率和探针频率下的超窄峰的逆宽度给出了纵向自旋弛豫时间(T_1),斯托克斯和反斯托克斯自旋共振的谱图给出了自相移相时间,包括不均匀的时间。扩大(T_2〜*)。可以通过五阶微分透射光谱中超窄孔燃烧共振的逆宽度来测量不包括均匀峰展宽效应(T_2)的横向自旋弛豫时间。

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