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Chen J, Chen F, Wang X, Zhao Y, Wu Y, Cao Q, Jiang T, Li K, Li Y, Zhang J, Wu W, Che R. Room-Temperature Response Performance of Coupled Doped-Well Quantum Cascade Detectors with Array Structure. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 13:110. [PMID: 36616020 PMCID: PMC9824534 DOI: 10.3390/nano13010110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/23/2022] [Accepted: 12/24/2022] [Indexed: 06/17/2023]
Abstract
Energy level interaction and electron concentration are crucial aspects that affect the response performance of quantum cascade detectors (QCDs). In this work, two different-structured array QCDs are prepared, and the detectivity reaches 109 cm·Hz1/2/W at room temperature. The overlap integral (OI) and oscillator strength (OS) between different energy levels under a series of applied biases are fitted and reveal the influence of energy level interaction on the response performance. The redistribution of electrons in the cascade structure at room temperatures is established. The coupled doped-well structure shows a higher electron concentration at room temperature, which represents a high absorption efficiency in the active region. Even better responsivity and detectivity are exhibited in the coupled doped-well QCD. These results offer a novel strategy to understand the mechanisms that affect response performance and expand the application range of QCDs for long-wave infrared (LWIR) detection.
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Affiliation(s)
- Jie Chen
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
- Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
| | - Fengwei Chen
- Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
| | - Xuemin Wang
- Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
| | - Yunhao Zhao
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
| | - Yuyang Wu
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
| | - Qingchen Cao
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
| | - Tao Jiang
- Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
| | - Keyu Li
- Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
| | - Yang Li
- Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
| | | | - Weidong Wu
- Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
| | - Renchao Che
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
- Zhejiang Laboratory, Hangzhou 311100, China
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