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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >A vector model for analysing the surface photovoltage amplitude and phase spectra applied to complicated nanostructures
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A vector model for analysing the surface photovoltage amplitude and phase spectra applied to complicated nanostructures

机译：用于分析应用于复杂纳米结构的表面光电压幅值和相谱的矢量模型

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摘要

An approach is presented for comprehensive and reliable analysis of the surface photovoltage (SPV) amplitude and phase spectral behaviour in various semiconductor materials and structures. In this approach the SPV signal is represented as a radial vector with magnitude equal to the SPV amplitude and angle with respect to the x-axis equal to the SPV phase. This model is especially helpful in complicated nanostructures, where more than one SPV formation processes arises during the spectrum run. The value of the proposed model has been demonstrated by the successful explanation of seemingly contradictory SPV amplitude and phase spectra of AlAs/GaAs superlattices with embedded GaAs quantum wells, grown on different GaAs substrates. This has provided useful information about the investigated nanostructures. The need for simultaneous examination of both SPV amplitude and SPV phase spectra in order to obtain a correct understanding of the experimental data is emphasized.
机译：提出了一种方法，可以对各种半导体材料和结构中的表面光电压（SPV）幅度和相位光谱行为进行全面而可靠的分析。在这种方法中，SPV信号表示为一个径向矢量，其大小等于SPV幅度，并且相对于x轴的角度等于SPV相位。该模型在复杂的纳米结构中特别有用，在光谱运行过程中会出现多个SPV形成过程。该模型的价值已通过成功解释了在不同GaAs衬底上生长的，嵌入GaAs量子阱的AlAs / GaAs超晶格看似矛盾的SPV幅值和相谱得到了证明。这提供了有关所研究的纳米结构的有用信息。强调了需要同时检查SPV振幅和SPV相谱以便正确理解实验数据。

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