半导体激子和双激子对相位分辨光学二维傅里叶变换谱贡献的偏振依赖性
Polarization dependence of semiconductor exciton and biexciton contributions to phase-resolved optical two-dimensional Fourier-transform spectra
摘要：
研究了GaAs量子阱中与激子、双激子和多体效应有关的相干光-物质相互作用。对于大多数极化配置，激子功能占主导地位的相位分辨二维傅里叶变换（2DFT）光谱，并具有色散的线形，表明存在多体相互作用。对于交叉线性激发，激子的功能变得弱，吸收由于多体效应的强烈抑制，结果不能直接确定在瞬态四波混频实验。双激子的功能不削弱交叉极化激发，因此更重要。
英文摘要：
We study the coherent light-matter interactions of GaAs quantum wells associated with excitons, biexcitons and many-body effects. For most polarization configurations, excitonic features dominate the phase-resolved two-dimensional Fourier-transform (2DFT) spectra and have dispersive lineshapes, indicating the presence of many-body interactions. For cross-linear excitation, excitonic features become weak and absorptive due to the strong suppression of many-body effects; a result that can not be directly determined in transient four-wave mixing experiments. The biexcitonic features do not weaken for cross-polarized excitation and thus are more important.
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