Heterostructure of a 2.5 THz Range Quantum-Cascade Detector

• Published in: Semiconductors (Woodbury, N.Y.) Vol. 57; no. 10; pp. 440 - 444
• Main Authors: Babichev, A. V., Kolodeznyi, E. S., Gladyshev, A. G., Denisov, D. V., Jollivet, A., Quach, P., Karachinsky, L. Ya, Nevedomsky, V. N., Novikov, I. I., Tchernycheva, M., Julien, F. H., Egorov, A. Yu
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.10.2023; Springer; Springer Nature B.V
• Subjects: Detectors; Diffraction; Epitaxial growth; Epitaxy; Heterostructures; Iterative methods; Iterative solution; Magnetic Materials; Magnetism; Molecular beam epitaxy; Numerical methods; Physics; Physics and Astronomy; Poisson equation; Thickness; X-rays; gallium arsenide; quantum-cascade detector; epitaxy; superlattices
• ISSN: 1063-7826; 1090-6479
• DOI: 10.1134/S1063782623050019

The design of the heterostructure of a 2.5 THz range quantum-cascade detector is proposed and heterostructure is grown by molecular-beam epitaxy technique. To optimize the thicknesses of the layers of the heterostructure cascades, a numerical method for iterative solution of the Schrödinger–Poisson equation in the kp formalism was used. The grown heterostructure of the quantum-cascade detector showed a high structural perfection, confirmed by the small values of the average FWHM of the high-order satellite peaks on the X-ray diffraction rocking curves, which were (8 . 3 ± 0 . 5) n . Analysis of dark-field images obtained by transmission electron microscopy showed that the total thickness of the layers in the cascade is 137 . 3 ± 6 . 9 nm, which corresponds to the calculated thickness of the layers in the cascade of the heterostructure of the quantum-cascade detector.