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  1. No Access

    Article

    3.8 THz Quantum Cascade Laser Grown by Metalorganic Vapor Phase Epitaxy

    We have demonstrated a quantum cascade laser (QCL) with a generation frequency of about 3.8 THz, grown by metal-organic vapor phase epitaxy. The multilayer heterostructure for QCLs consists of 185 repetitions ...

    T. A. Bagaev, M. A. Ladugin, A. A. Marmalyuk, A. I. Danilov… in Technical Physics Letters (2023)

  2. No Access

    Article

    Temperature Degradation of 2.3, 3.2 and 4.1 THz Quantum Cascade Lasers

    In this work, we conduct research of spectral and power characteristics of quantum cascade lasers (QCLs) based on a GaAs/Al0.15Ga0.85As active region emitting at 2.3 (A), 3.2 (B) and 4.1 (C) THz. The QCL devices ...

    D. A. Belov, A. V. Ikonnikov, S. S. Pushkarev, R. R. Galiev… in Semiconductors (2023)

  3. No Access

    Article

    Plasmonic Metasurfaces for Controlling the Spectrum of Photoconductive THz Emitters

    Plasmonic metasurfaces for photoconductive antennas (PCAs) based on InAlAs/InGaAs superlattice heterostructures are proposed and fabricated. It is found by the measurements of the PCAs in a terahertz pulsed sp...

    I. A. Glinskiy, A. E. Yachmenev, D. V. Lavrukhin… in Nanobiotechnology Reports (2022)

  4. No Access

    Article

    New Designs of Laser Transitions in Terahertz Quantum–Cascade Lasers

    We study the band designs of terahertz quantum–cascade lasers (THz QCLs) with an active region of GaAs/AlxGa1−xAs quantum wells (QWs) by using the solution of the Schrödinger equation with allowance for dephasing...

    D. V. Ushakov, A. A. Afonenko, D. S. Ponomarev… in Radiophysics and Quantum Electronics (2022)

  5. No Access

    Article

    3.3 THz Quantum Cascade Laser Based on a Three GaAs/AlGaAs Quantum-Well Active Module with an Operating Temperature above 120 K

    The design of a terahertz (THz) quantum cascade laser (QCL) with an active module based on three GaAs/Al0.18Ga0.82As quantum wells for high-temperature generation at a frequency of about 3.3 THz is optimized. A h...

    R. A. Khabibullin, K. V. Maremyanin, D. S. Ponomarev, R. R. Galiev… in Semiconductors (2022)

  6. No Access

    Article

    New Materials and Structures for Efficient Terahertz (THz) Spectroscopy

    Abstract—The results of developments of materials and structures used for generation and detection of terahertz radiation having applied photoconductive antennas are presented. The developments were carried out i...

    E. D. Mishina, A. M. Buryakov… in Journal of Communications Technology and E… (2021)

  7. No Access

    Article

    Photoconductive THz Detector Based on New Functional Layers in Multi-Layer Heterostructures

    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,...

    A. E. Yachmenev, D. V. Lavrukhin, R. A. Khabibullin… in Optics and Spectroscopy (2021)

  8. No Access

    Article

    A Photoconductive THz Detector Based on a Superlattice Heterostructure with Plasmonic Amplification

    A highly sensitive terahertz (THz) detector based on a photoconductive antenna (PCA) with plasmonic amplification on the basis of an InGaAs/InAlAs superlattice heterostructure is proposed. A noticeable increas...

    A. V. Gorbatova, D. I. Khusyainov, A. E. Yachmenev… in Technical Physics Letters (2020)

  9. No Access

    Article

    Emission Efficiency of Terahertz Antennas with Conventional Topology and Metal Metasurface: A Comparative Analysis

    Characteristics of photoconductive antennas (PCAs)—radiation sources with conventional topology and a metal metasurface in the shape of a plasmonic grating made on the basis of InGaAs/InAlAs superlattice heter...

    D. V. Lavrukhin, A. E. Yachmenev, I. A. Glinskiy… in Optics and Spectroscopy (2020)

  10. No Access

    Article

    Plasmonic Photoconductive Antennas for Terahertz Pulsed Spectroscopy and Imaging Systems

    We propose a terahertz (THz) plasmonic photoconductive antenna (PCA) with a record height of its metal electrodes of h = 100 nm and a high aspect ratio of h/p = 0.5 (p is the period of the plasmonic grating) that...

    D. V. Lavrukhin, R. R. Galiev, A. Yu. Pavlov, A. E. Yachmenev… in Optics and Spectroscopy (2019)

  11. No Access

    Article

    Terahertz Microscope Based on Solid Immersion Effect for Imaging of Biological Tissues

    We propose a new method of terahertz microscopy for imaging of biological tissues with a subwavelength spatial resolution. It makes it possible to surmount the Abbe diffraction limit and ensures a subwavelengt...

    N. V. Chernomyrdin, A. S. Kucheryavenko, E. N. Rimskaya… in Optics and Spectroscopy (2019)

  12. No Access

    Article

    The Role of Excitation Photons Energy in the Photoinduced Carrier Dynamics in InGaAs/InAlAs Superlattice Heterostructures

    The influence of excitation photons energy on the relaxation times of photoexcited carriers is studied. The involved relaxation mechanisms are evaluated and the reflection coefficient of the InGaAs/InAlAs supe...

    A. M. Buryakov, D. I. Khusyainov, E. D. Mishina… in Technical Physics Letters (2018)

  13. No Access

    Article

    Temperature Dependences of the Threshold Current and Output Power of a Quantum-Cascade Laser Emitting at 3.3 THz

    The active region of a THz (terahertz) quantum-cascade laser based on three tunnel-coupled GaAs/Al0.15Ga0.85As quantum wells with a resonance-phonon depopulation scheme is designed. Energy levels, matrix elements...

    R. A. Khabibullin, N. V. Shchavruk, D. S. Ponomarev, D. V. Ushakov… in Semiconductors (2018)

  14. No Access

    Article

    Ultrafast Dynamics of Photoexcited Charge Carriers in In0.53Ga0.47As/In0.52Al0.48As Superlattices under Femtosecond Laser Excitation

    The results of experimental studies of the time dynamics of photoexcited charge carriers in In0.53Ga0.47As/In0.52Al0.48As superlattices grown by molecular-beam epitaxy on a GaAs substrate with a metamorphic buffe...

    D. S. Ponomarev, R. A. Khabibullin, A. N. Klochkov, A. E. Yachmenev… in Semiconductors (2018)

  15. No Access

    Article

    Frequency Characteristics of GaN Field-Effect Transistors with Traps in the Barrier Layer

    This paper presents a modified nonlinear model of the Fujii transistor that incorporates the gate capacitance values obtained by capacitance-voltage measurements. It is shown that the proposed model allows us ...

    A. N. Aleshin, N. V. Zenchenko, D. S. Ponomarev, O. A. Ruban in Russian Microelectronics (2018)

  16. No Access

    Article

    Trace Element Composition and Classification of the Chinga Iron Meteorite

    A complete microelement analysis of the Chinga meteorite was performed, and the possibility of attributing it together with a number of other iron meteorites into the IVC subgroup, which is transition between ...

    K. D. Litasov, A. Ishikawa, I. S. Bazhan, D. S. Ponomarev… in Doklady Earth Sciences (2018)

  17. No Access

    Article

    Altaite (PbTe) in the Maslyanino Iron Meteorite with Silicate Inclusions

    Data are presented on the discovery of altaite in the Maslyanino iron meteorite with silicate inclusions (IAB group), the interrelations of altaite and other minerals are shown, and models of altaite petrogene...

    K. D. Litasov, D. S. Ponomarev, I. S. Bazhan, A. Ishikawa… in Doklady Earth Sciences (2018)

  18. No Access

    Article

    Total Efficiency of the Optical-to-Terahertz Conversion in Photoconductive Antennas Based on LT-GaAs and In0.38Ga0.62As

    The total efficiency of the optical-terahertz conversion ηtotal in photoconductive antennas (PCAs) on the basis of different materials (LT-GaAs and In0.38Ga0.62As) under optical laser excitation at wavelengths of...

    I. A. Glinskiy, R. A. Khabibullin, D. S. Ponomarev in Russian Microelectronics (2017)

  19. No Access

    Article

    Epitaxial stresses in an InGaAs photoconductive layer for terahertz antennas

    The effect of epitaxial stresses on the excess-carrier dynamics and the terahertz radiation spectrum of the InyGa1–yAs films have been investigated by optical pump-probe and terahertz time-domain spectroscopy. It...

    D. I. Khusyainov, A. M. Buryakov, V. R. Bilyk, E. D. Mishina… in Technical Physics Letters (2017)

  20. No Access

    Article

    Electrical and thermal properties of photoconductive antennas based on In x Ga1 – x As (x > 0.3) with a metamorphic buffer layer for the generation of terahertz radiation

    The results of studies of the electrical and thermal properties of photoconductive antennas for terahertz-radiation generation are reported; these antennas are fabricated on the basis of low-temperaturegrown G...

    D. S. Ponomarev, R. A. Khabibullin, A. E. Yachmenev, A. Yu. Pavlov… in Semiconductors (2017)

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