| Autor: |
Chia-Hua Huang, Hao Lo, Chieh Lo, Wen-Shiung Lour |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
IEEE Journal of the Electron Devices Society, Vol 8, Pp 92-98 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2168-6734 |
| DOI: |
10.1109/JEDS.2020.2965200 |
| Popis: |
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 μA/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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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