High performance very long wave infrared quantum cascade detector

K. Guo; K. Li; Y. X. Zhu; J. Q. Liu; S. M. Liu; F. Q. Liu; X. H. Wang; Z. P. Wei

doi:10.1117/12.2664941

31 January 2023 High performance very long wave infrared quantum cascade detector

K. Guo, K. Li, Y. X. Zhu, J. Q. Liu, S. M. Liu, F. Q. Liu, X. H. Wang, Z. P. Wei

Proceedings Volume 12505, Earth and Space: From Infrared to Terahertz (ESIT 2022); 1250506 (2023) https://doi.org/10.1117/12.2664941
Event: Earth and Space: From Infrared to Terahertz (ESIT 2022), 2022, Nantong, China

Abstract

In this letter, we introduce a very long wave infrared Quantum Cascade Detector (QCD) with a peak response wavelength of 14.5 μm based on a twin-well coupled absorption region design. Different to standard, single transition well QCDs, the twin-well design effectively enhances the absorption strength of the device and broadens the response spectrum to a certain extent. At 77 K, we observed a responsivity of 3.51 mA / W and a Johnson noise limited detectivity of 1×108 Jones. Altogether, this design resulted in detection at temperatures of up to 140 K with a calibrated black-body source by light coupling using a 45° wedge. These high performance very long wave QCDs are expected to provide pollution monitoring, deep space exploration and other applications.

Citation Download Citation

K. Guo, K. Li, Y. X. Zhu, J. Q. Liu, S. M. Liu, F. Q. Liu, X. H. Wang, and Z. P. Wei "High performance very long wave infrared quantum cascade detector", Proc. SPIE 12505, Earth and Space: From Infrared to Terahertz (ESIT 2022), 1250506 (31 January 2023); https://doi.org/10.1117/12.2664941

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