Asymmetric AlGaAs/GaAs/InGaAs Based Quantum Well Long Wavelength Infrared Photodetector
An asymmetric quantum well structure has been developed for 6-10 μm detection. The asymmetric structure consists of N-doped InGaAs wells, GaAs steps and undoped AlGaAs barriers. Due to the strong coupling effect of the electronic state wave functions, significant absorption is observed. But, the abs...
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| Published in: | 2020 4th International Conference on Electronics, Materials Engineering & Nano-Technology (IEMENTech) pp. 1 - 3 |
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IEEE
02-10-2020
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| Abstract | An asymmetric quantum well structure has been developed for 6-10 μm detection. The asymmetric structure consists of N-doped InGaAs wells, GaAs steps and undoped AlGaAs barriers. Due to the strong coupling effect of the electronic state wave functions, significant absorption is observed. But, the absorption decreases with the increasing Indium concentration of In y Ga 1-y As. A reasonable responsivity of 83 mA/W is obtained from our considered model. Responsivity can be increased by manipulating structural parameters of the materials. Enhanced responsivity of 150 and 112 mA/W are observed for doping of 1x10 18 cm -3 and Quantum wells of 26 respectively. |
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| AbstractList | An asymmetric quantum well structure has been developed for 6-10 μm detection. The asymmetric structure consists of N-doped InGaAs wells, GaAs steps and undoped AlGaAs barriers. Due to the strong coupling effect of the electronic state wave functions, significant absorption is observed. But, the absorption decreases with the increasing Indium concentration of In y Ga 1-y As. A reasonable responsivity of 83 mA/W is obtained from our considered model. Responsivity can be increased by manipulating structural parameters of the materials. Enhanced responsivity of 150 and 112 mA/W are observed for doping of 1x10 18 cm -3 and Quantum wells of 26 respectively. |
| Author | Biswas, Aparna Choudhary, Santosh K. Chatterjee, Sanjay Billaha, Md Aref Roy, Bhaskar Bishnu, Soham Kanti Ray, Sutapa |
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| Snippet | An asymmetric quantum well structure has been developed for 6-10 μm detection. The asymmetric structure consists of N-doped InGaAs wells, GaAs steps and... |
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| SubjectTerms | Absorption asymmetric quantum wells Doping Indium Indium concentration Indium gallium arsenide inter-subband absorption Mathematical model Performance evaluation Photodetectors responsivity |
| Title | Asymmetric AlGaAs/GaAs/InGaAs Based Quantum Well Long Wavelength Infrared Photodetector |
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