Photoresponse of Long-Wavelength AlGaAs/GaAs Quantum Cascade Detectors
We study the photoresponse and photocurrents of long-wavelength infrared quantum cascade detectors (QCDs) based on AlGaAs/GaAs material system. The photocurrent spectra were measured at different temperatures from 20 K to 100 K with a low noise Fourier transforming infrared spectrometer. The main re...
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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/10.1155/2015/306912 |
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| _version_ | 1832551560511488000 |
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| author | Liang Li Dayuan Xiong |
| author_facet | Liang Li Dayuan Xiong |
| author_sort | Liang Li |
| collection | DOAJ |
| description | We study the photoresponse and photocurrents of long-wavelength infrared quantum cascade detectors (QCDs) based on AlGaAs/GaAs material system. The photocurrent spectra were measured at different temperatures from 20 K to 100 K with a low noise Fourier transforming infrared spectrometer. The main response peak appeared at 8.9 μm while four additional response peaks from 4.5 μm to 10.1 μm were observed as well. We confirmed that the photocurrent comes from phonon assisted tunneling and the multipeak behavior comes from the complicated optical transition in the quantum cascade structure. This work is valuable for the future design and optimization of QCD devices. |
| format | Article |
| id | doaj-art-b53d709355084938991c027a274b48ec |
| 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-b53d709355084938991c027a274b48ec2025-02-03T06:01:14ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242015-01-01201510.1155/2015/306912306912Photoresponse of Long-Wavelength AlGaAs/GaAs Quantum Cascade DetectorsLiang Li0Dayuan Xiong1Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, Shanghai 200241, ChinaKey Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, Shanghai 200241, ChinaWe study the photoresponse and photocurrents of long-wavelength infrared quantum cascade detectors (QCDs) based on AlGaAs/GaAs material system. The photocurrent spectra were measured at different temperatures from 20 K to 100 K with a low noise Fourier transforming infrared spectrometer. The main response peak appeared at 8.9 μm while four additional response peaks from 4.5 μm to 10.1 μm were observed as well. We confirmed that the photocurrent comes from phonon assisted tunneling and the multipeak behavior comes from the complicated optical transition in the quantum cascade structure. This work is valuable for the future design and optimization of QCD devices.http://dx.doi.org/10.1155/2015/306912 |
| spellingShingle | Liang Li Dayuan Xiong Photoresponse of Long-Wavelength AlGaAs/GaAs Quantum Cascade Detectors Advances in Condensed Matter Physics |
| title | Photoresponse of Long-Wavelength AlGaAs/GaAs Quantum Cascade Detectors |
| title_full | Photoresponse of Long-Wavelength AlGaAs/GaAs Quantum Cascade Detectors |
| title_fullStr | Photoresponse of Long-Wavelength AlGaAs/GaAs Quantum Cascade Detectors |
| title_full_unstemmed | Photoresponse of Long-Wavelength AlGaAs/GaAs Quantum Cascade Detectors |
| title_short | Photoresponse of Long-Wavelength AlGaAs/GaAs Quantum Cascade Detectors |
| title_sort | photoresponse of long wavelength algaas gaas quantum cascade detectors |
| url | http://dx.doi.org/10.1155/2015/306912 |
| work_keys_str_mv | AT liangli photoresponseoflongwavelengthalgaasgaasquantumcascadedetectors AT dayuanxiong photoresponseoflongwavelengthalgaasgaasquantumcascadedetectors |