Electrical flicker-noise analysis based on trapping and de-trapping model in quantum-cascade detectors

T. Dougakiuchi; K. Fujita; Y. Kadoya

doi:10.1117/12.3000104

8 March 2024 Electrical flicker-noise analysis based on trapping and de-trapping model in quantum-cascade detectors

T. Dougakiuchi, K. Fujita, Y. Kadoya

Proceedings Volume 12895, Quantum Sensing and Nano Electronics and Photonics XX; 128950I (2024) https://doi.org/10.1117/12.3000104
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Quantum-cascade (QC) detectors are photovoltaic infrared detectors that exhibit low-noise characteristics dominated by the Johnson–Nyquist noise owing to the absence of fluctuations brought on by an external operation bias. When the Johnson–Nyquist noise level is low (at high device resistances), the flicker noise cannot be ignored in the lower-frequency region. However, the flicker noise seen in QC detectors has not been sufficiently discussed, and only the Johnson–Nyquist noise has been considered. In this study, we carried out flicker-noise analysis for mid-infrared QC detectors with a response wavelength of approximately 4.5 μm using experimental and theoretical approaches. The theoretical predictions, which were based on fluctuating charge-dipoles caused by electron trappings and de-trappings at impurity states, showed qualitative agreement with the measured temperature and device size dependencies of the flicker noise. Because doping of impurities into the absorption well is essential for detector operation, the results suggest that flicker noise is unavoidable in QC detectors. Therefore, to achieve the best low-noise performance of QC detectors, it is important to understand how flicker noise behaves in QC detectors using a theoretical model that considers the experimental results.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

T. Dougakiuchi, K. Fujita, and Y. Kadoya "Electrical flicker-noise analysis based on trapping and de-trapping model in quantum-cascade detectors", Proc. SPIE 12895, Quantum Sensing and Nano Electronics and Photonics XX, 128950I (8 March 2024); https://doi.org/10.1117/12.3000104

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