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Proceedings of the international conference ''The XXIV Annual Conference Saratov Fall Meeting 2020''
Applied optics
Photoconductive THz detector based on new functional layers in multi-layer heterostructures
A. E. Yachmenevab, D. V. Lavrukhinab, R. A. Khabibullina, Yu. G. Goncharovb, I. E. Spektorb, K. I. Zaitsevb, V. A. Solov'evc, S. V. Ivanovc, D. S. Ponomarevab a V. G. Mokerov Institute of Ultra High Frequency Semiconductor Electronics of RAS, Moscow
b Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow
c Ioffe Institute, St. Petersburg
Abstract:
Characteristics of photoconductive antennas (PCAs) based on InGaAs/InAs/InAlAs superlattice heterostructures exhibiting different types of elastic strain in the layers are compared experimentally. THz signals, noise characteristics, and signal-to-noise ratios of the PCA-detectors were compared by means of a laboratory pulsed time-domain THz spectrometer at different levels of average optical-probe power. A larger detection bandwidth in entire range of probe power is demonstrated experimentally for PCA-detectors based on superlattice heterostructures exhibiting both compressive and tensile strain compared to lattice-matched superlattice heterostructures. It can thus be stated that modification of properties of superlattice heterostructures by introducing strain in the crystal lattice represents a universal and relatively efficient method of improving characteristics of PCAs based on such heterostructures, which allows using these PCAs for development of THz spectroscopy and imaging systems.
Keywords:
Terahertz science and technology, terahertz pulsed spectroscopy, TDS, terahertz element base, PCA, photoconductive antenna-detector, semiconductors, superlattice heterostructure, molecular-beam epitaxy, non-invasive medicine.
Received: 31.12.2020 Revised: 01.02.2021 Accepted: 26.02.2021
Citation:
A. E. Yachmenev, D. V. Lavrukhin, R. A. Khabibullin, Yu. G. Goncharov, I. E. Spektor, K. I. Zaitsev, V. A. Solov'ev, S. V. Ivanov, D. S. Ponomarev, “Photoconductive THz detector based on new functional layers in multi-layer heterostructures”, Optics and Spectroscopy, 129:6 (2021), 741–746; Optics and Spectroscopy, 129:8 (2021), 851–856
Linking options:
https://www.mathnet.ru/eng/os118 https://www.mathnet.ru/eng/os/v129/i6/p741
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