Kai Guo;Yixuan Zhu;Yu Chen;Kun Li;Shenqiang Zhai;Shuman Liu;Ning Zhuo;Jinchuan Zhang;Lijun Wang;Fengqi Liu;Xiaohua Wang;Zhipeng Wei;Junqi Liu
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High-Performance Very Long Wave Infrared Quantum Cascade Detector Grown by MOCVD
We present a very long wave infrared (VLWIR) quantum cascade detector (QCD) optimized for the extraction region grown by metal organic chemical vapor deposition (MOCVD). The wave function of high-energy states has been tailored into a funnel-shaped miniband structure. This design accelerates the extraction and collection of electrons, thereby enhancing the device’s extraction efficiency, with a theoretical calculation value of 91%. Besides, this miniband extraction scheme also increases the number of well barrier pairs between the ground state and the longitudinal optical (LO) phonon step level. The electron loss caused by thermal backfilling and thermally activated leakage can be effectively reduced. For a
$200~\mu $
m
$\times 200~\mu $
m mesa device from a 4-inch wafer, a peak responsivity of 66 mA/W and a peak specific detectivity of
$1.4 \times 10^{11}$
Jones were obtained at 30 K, with the maximum operating temperature persists up to 170 K.
期刊介绍:
The IEEE Journal of Quantum Electronics is dedicated to the publication of manuscripts reporting novel experimental or theoretical results in the broad field of the science and technology of quantum electronics. The Journal comprises original contributions, both regular papers and letters, describing significant advances in the understanding of quantum electronics phenomena or the demonstration of new devices, systems, or applications. Manuscripts reporting new developments in systems and applications must emphasize quantum electronics principles or devices. The scope of JQE encompasses the generation, propagation, detection, and application of coherent electromagnetic radiation having wavelengths below one millimeter (i.e., in the submillimeter, infrared, visible, ultraviolet, etc., regions). Whether the focus of a manuscript is a quantum-electronic device or phenomenon, the critical factor in the editorial review of a manuscript is the potential impact of the results presented on continuing research in the field or on advancing the technological base of quantum electronics.