Photoelectric Characteristics of Double Barrier Quantum Dots-Quantum Well Photodetector
The photodetector based on double barrier AlAs/GaAs/AlAs heterostructures and a layer self-assembled InAs quantum dots and In0.15Ga0.85As quantum well (QW) hybrid structure is demonstrated. The detection sensitivity and detection ability under weak illuminations have been proved. The dark current of...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2015/920805 |
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| author | M. J. Wang F. Y. Yue F. M. Guo |
| author_facet | M. J. Wang F. Y. Yue F. M. Guo |
| author_sort | M. J. Wang |
| collection | DOAJ |
| description | The photodetector based on double barrier AlAs/GaAs/AlAs heterostructures and a layer self-assembled InAs quantum dots and In0.15Ga0.85As quantum well (QW) hybrid structure is demonstrated. The detection sensitivity and detection ability under weak illuminations have been proved. The dark current of the device can remain at 0.1 pA at 100 K, even lower to 3.05×10-15 A, at bias of −1.35 V. Its current responsivity can reach about 6.8×105 A/W when 1 pw 633 nm light power and −4 V bias are added. Meanwhile a peculiar amplitude quantum oscillation characteristic is observed in testing. A simple model is used to qualitatively describe. The results demonstrate that the InAs monolayer can effectively absorb photons and the double barrier hybrid structure with quantum dots in well can be used for low-light-level detection. |
| format | Article |
| id | doaj-art-8e3c896945d54658b92c259e3f4aaaa8 |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-8e3c896945d54658b92c259e3f4aaaa82025-02-03T01:33:15ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242015-01-01201510.1155/2015/920805920805Photoelectric Characteristics of Double Barrier Quantum Dots-Quantum Well PhotodetectorM. J. Wang0F. Y. Yue1F. M. Guo2Shanghai Key Laboratory of Multidimensional Information Processing, Key Laboratory of Polar Materials & Devices, School of Information Science Technology, East China Normal University, No. 500, Dong Chuan Road, Shanghai 200241, ChinaShanghai Key Laboratory of Multidimensional Information Processing, Key Laboratory of Polar Materials & Devices, School of Information Science Technology, East China Normal University, No. 500, Dong Chuan Road, Shanghai 200241, ChinaShanghai Key Laboratory of Multidimensional Information Processing, Key Laboratory of Polar Materials & Devices, School of Information Science Technology, East China Normal University, No. 500, Dong Chuan Road, Shanghai 200241, ChinaThe photodetector based on double barrier AlAs/GaAs/AlAs heterostructures and a layer self-assembled InAs quantum dots and In0.15Ga0.85As quantum well (QW) hybrid structure is demonstrated. The detection sensitivity and detection ability under weak illuminations have been proved. The dark current of the device can remain at 0.1 pA at 100 K, even lower to 3.05×10-15 A, at bias of −1.35 V. Its current responsivity can reach about 6.8×105 A/W when 1 pw 633 nm light power and −4 V bias are added. Meanwhile a peculiar amplitude quantum oscillation characteristic is observed in testing. A simple model is used to qualitatively describe. The results demonstrate that the InAs monolayer can effectively absorb photons and the double barrier hybrid structure with quantum dots in well can be used for low-light-level detection.http://dx.doi.org/10.1155/2015/920805 |
| spellingShingle | M. J. Wang F. Y. Yue F. M. Guo Photoelectric Characteristics of Double Barrier Quantum Dots-Quantum Well Photodetector Advances in Condensed Matter Physics |
| title | Photoelectric Characteristics of Double Barrier Quantum Dots-Quantum Well Photodetector |
| title_full | Photoelectric Characteristics of Double Barrier Quantum Dots-Quantum Well Photodetector |
| title_fullStr | Photoelectric Characteristics of Double Barrier Quantum Dots-Quantum Well Photodetector |
| title_full_unstemmed | Photoelectric Characteristics of Double Barrier Quantum Dots-Quantum Well Photodetector |
| title_short | Photoelectric Characteristics of Double Barrier Quantum Dots-Quantum Well Photodetector |
| title_sort | photoelectric characteristics of double barrier quantum dots quantum well photodetector |
| url | http://dx.doi.org/10.1155/2015/920805 |
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