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Comprehensive Studies of High-Linearity Position-Sensitivity Detectors with Theoretical Consideration on Lateral Photovoltaic Currents
IEEE Journal of the Electron Devices Society ( IF 2.3 ) Pub Date : 2020-01-01 , DOI: 10.1109/jeds.2020.2965200 Chia-Hua Huang , Hao Lo , Chieh Lo , Wen-Shiung Lour
IEEE Journal of the Electron Devices Society ( IF 2.3 ) Pub Date : 2020-01-01 , DOI: 10.1109/jeds.2020.2965200 Chia-Hua Huang , Hao Lo , Chieh Lo , Wen-Shiung Lour
Detective properties of a GaAs-based position sensitive detector (PSD) employing a very thin, highly doped p+-GaAs layer as a resistive layer were investigated. In addition to photovoltaic voltages, photovoltaic currents from a three-terminal PSD with two lateral electrodes and one transverse common electrode were also studied. In particular, lateral photovoltaic currents flowing into the two lateral electrodes and/or their differential values, instead of transverse photovoltaic currents were used as output signals. To do so, a PSD itself without power supply was proposed to realize its suitability for applications. When a 2 mW 638 nm light spot was used as an input, a position sensitivity of $38.5~\mu \text{A}$ /mm, a correlation coefficient (or linearity) of > 0.999, and a nonlinearity (or position error) of 1.25% were obtained for our GaAs-based PSD with a long distance of 14 mm between two lateral electrodes. Besides, an equivalent circuit with a point solar cell was proposed to successfully explain these photovoltaic currents found in various configured 2-terminal and 3-terminal PSDs.
中文翻译:
从横向光伏电流的理论考虑对高线性位置灵敏度探测器的综合研究
研究了采用非常薄的高掺杂 p+-GaAs 层作为电阻层的基于 GaAs 的位置敏感检测器 (PSD) 的检测特性。除了光伏电压外,还研究了来自具有两个横向电极和一个横向公共电极的三端 PSD 的光伏电流。特别地,使用流入两个横向电极的横向光伏电流和/或它们的差分值而不是横向光伏电流作为输出信号。为此,提出了本身不带电源的 PSD 以实现其应用的适用性。当使用 2 mW 638 nm 光斑作为输入时,位置灵敏度为 $38.5~\mu \text{A}$ /mm,相关系数(或线性)> 0.999,非线性(或位置误差) 1. 我们的基于 GaAs 的 PSD 获得了 25%,两个横向电极之间的距离为 14 mm。此外,提出了具有点太阳能电池的等效电路来成功解释在各种配置的 2 端和 3 端 PSD 中发现的这些光伏电流。
更新日期:2020-01-01
中文翻译:
从横向光伏电流的理论考虑对高线性位置灵敏度探测器的综合研究
研究了采用非常薄的高掺杂 p+-GaAs 层作为电阻层的基于 GaAs 的位置敏感检测器 (PSD) 的检测特性。除了光伏电压外,还研究了来自具有两个横向电极和一个横向公共电极的三端 PSD 的光伏电流。特别地,使用流入两个横向电极的横向光伏电流和/或它们的差分值而不是横向光伏电流作为输出信号。为此,提出了本身不带电源的 PSD 以实现其应用的适用性。当使用 2 mW 638 nm 光斑作为输入时,位置灵敏度为 $38.5~\mu \text{A}$ /mm,相关系数(或线性)> 0.999,非线性(或位置误差) 1. 我们的基于 GaAs 的 PSD 获得了 25%,两个横向电极之间的距离为 14 mm。此外,提出了具有点太阳能电池的等效电路来成功解释在各种配置的 2 端和 3 端 PSD 中发现的这些光伏电流。