论文标题
光谱电流密度和响应性缩放的傅立叶变换光电流光谱法
Spectral Current Density and Responsivity Scaling for Fourier Transform Photocurrent Spectroscopy
论文作者
论文摘要
我们建议并实验验证两种方法，以在傅立叶变换光电流（FTPC）光谱中缩放任意单元至光电流光谱密度（A/EV）。我们还建议将FTPC扩展为响应率（A/W），前提是提供狭窄的波段光学功率测量。干涉图的恒定背景提供了光电流密度的精确确定。第二种方法依赖于干涉图的缩放幅度。尽管后一种方法导致更大的误差，但它仍然提供了总光电流的良好数量级估计。我们在校准的INGAA二极管和弱响应性SIC间互密的传感器上演示了该技术。我们确定了SIC传感器中的一系列杂质频段和带之间的转变。
We propose and experimentally verify two methods to scale arbitrary units to photocurrent spectral density (A/eV) in Fourier Transform Photocurrent (FTPC) spectroscopy. We also propose the FTPC scaling to responsivity (A/W), provided a narrow-band optical power measurement is available. The constant background of the interferogram provides a precise determination of the photocurrent spectral density. The second method relies on the scaled amplitude of the interferogram. Although the latter method leads to more significant errors, it still provides good order of magnitude estimates of the total photocurrent. We demonstrate the technique on a calibrated InGaAs diode and weak responsivity SiC interdigital sensors. We identify a series of impurity-band and interband transitions in the SiC sensors.
