A quantum cascade detector with enhanced extraction efficiency utilizing localized electric field

An InGaAs/AlInAs quantum cascade detector (QCD) with localized electric field is proposed to produce a 40% higher extraction efficiency of photon-induced electrons when comparing with a conventional QCD. The localized electric field introduced by modulation doping extends the degrees of freedom in t...

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Bibliographic Details
Published in:IEEE photonics technology letters 2023-03, Vol.35 (5), p.1-1
Main Authors: Zhao, Ruo-Chen, Hao, Zhi-Biao, Wang, Lai, Wang, Jian, Xiong, Bing, Sun, Chang-Zheng, Han, Yan-Jun, Li, Hong-Tao, Zhuo, Ning, Liu, Feng-Qi, Luo, Yi
Format: Article
Language:English
Subjects:
Absorption
built-in electric field
Dark current
Detectors
Efficiency
Electric fields
Electron states
Electrons
extraction efficiency
infrared detection
Modulation doping
quantum cascade detectors
Quantum chromodynamics
Quantum state
Quantum wells
Temperature
Temperature measurement
Thermal noise
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Description
Summary:An InGaAs/AlInAs quantum cascade detector (QCD) with localized electric field is proposed to produce a 40% higher extraction efficiency of photon-induced electrons when comparing with a conventional QCD. The localized electric field introduced by modulation doping extends the degrees of freedom in the regulation of electronic states in quantum wells, which has significant influence on the transport of electrons. The electric field can enhance the extraction efficiency by enlarging the transition matrix element related to the extraction process. The proposed mid-IR QCD demonstrates a peak responsivity of 156.9 mA/W and a Johnson noise limited detectivity of 1.9×10 11 Jones at 80K.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2023.3239741