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Franco Nori - One of the best experts on this subject based on the ideXlab platform.

  • terahertz josephson Plasma Waves in layered superconductors spectrum generation nonlinear and quantum phenomena
    Reports on Progress in Physics, 2010
    Co-Authors: Sergey Savelev, A. L. Rakhmanov, V A Yampolskii, Franco Nori
    Abstract:

    The recent growing interest in terahertz (THz) and sub-THz science and technology is due to its many important applications in physics, astronomy, chemistry, biology and medicine, including THz imaging, spectroscopy, tomography, medical diagnosis, health monitoring, environmental control, as well as chemical and biological identification. We review the problem of linear and nonlinear THz and sub-THz Josephson Plasma Waves in layered superconductors and their excitations produced by moving Josephson vortices. We start by discussing the coupled sine-Gordon equations for the gauge-invariant phase difference of the order parameter in the junctions, taking into account the effect of breaking the charge neutrality, and deriving the spectrum of Josephson Plasma Waves. We also review surface and waveguide Josephson Plasma Waves. The spectrum of these Waves is presented, and their excitation is discussed. We review the propagation of weakly nonlinear Josephson Plasma Waves below the Plasma frequency, ωJ, which is very unusual for Plasma-like excitations. In close analogy to nonlinear optics, these Waves exhibit numerous remarkable features, including a self-focusing effect and the pumping of weaker Waves by a stronger one. In addition, an unusual stop-light phenomenon, when ∂ω/∂k ≈ 0, caused by both nonlinearity and dissipation, can be observed in the Josephson Plasma Waves. At frequencies above ωJ, the current-phase nonlinearity can be used for transforming continuous sub-THz radiation into short, strongly amplified, pulses. We also present quantum effects in layered superconductors, specifically, the problem of quantum tunneling of fluxons through stacks of Josephson junctions. Moreover, the nonlocal sine-Gordon equation for Josephson vortices is reviewed. We discuss the Cherenkov and transition radiations of the Josephson Plasma Waves produced by moving Josephson vortices, either in a single Josephson junction or in layered superconductors. Furthermore, the expression for the Cherenkov cone of the excited Josephson Plasma Waves is derived. We also discuss the problem of coherent radiation (superradiance) of the THz Waves by exciting uniform Josephson oscillations. The effects reviewed here could be potentially useful for sub-THz and THz emitters, filters and detectors.

  • Surface josephson Plasma Waves in layered superconductors above the Plasma frequency: Evidence for a negative index of refraction
    Physical Review Letters, 2010
    Co-Authors: V. A. Golick, D. V. Kadygrob, V. A. Yampol'skii, B A Ivanov, A. L. Rakhmanov, Franco Nori
    Abstract:

    We predict a new branch of surface Josephson Plasma Waves (SJPWs) in layered superconductors for frequencies higher than the Josephson Plasma frequency. In this frequency range, the permittivity tensor components along and transverse to the layers have different signs, which is usually associated with negative refraction. However, for these frequencies, the bulk Josephson Plasma Waves cannot be matched with the incident and reflected Waves in the vacuum, and, instead of the negative-refractive properties, abnormal surface modes appear within the frequency band expected for bulk modes. We also discuss the excitation of high-frequency SJPWs by means of the attenuated-total-reflection method.

  • terahertz josephson Plasma Waves in layered superconductors spectrum generation nonlinear and quantum phenomena
    arXiv: Superconductivity, 2009
    Co-Authors: Sergey Savelev, A. L. Rakhmanov, V A Yampolskii, Franco Nori
    Abstract:

    The recent growing interest in terahertz (THz) and sub-THz science and technology is due to its many important applications in physics, astronomy, chemistry, biology, and medicine. We review the problem of linear and non-linear THz and sub-THz Josephson Plasma Waves in layered superconductors and their excitations produced by moving Josephson vortices. We start by discussing the coupled sine-Gordon equations for the gauge-invariant phase difference of the order parameter in the junctions, taking into account the effect of breaking the charge neutrality, and deriving the spectrum of Josephson Plasma Waves. We also review surface and waveguide Josephson Plasma Waves. We review the propagation of weakly nonlinear Josephson Plasma Waves below the Plasma frequency, which is very unusual for Plasma-like excitations. In close analogy to nonlinear optics, these Waves exhibit numerous remarkable features, including a self-focusing effect, and the pumping of weaker Waves by a stronger one. We also present quantum effects in layered superconductors, specifically, the problem of quantum tunnelling of fluxons through stacks of Josephson junctions. We discuss the Cherenkov and transition radiations of the Josephson Plasma Waves produced by moving Josephson vortices. We also discuss the problem of coherent radiation (superradiance) of the THz Waves by exciting uniform Josephson oscillations. The effects reviewed here could be potentially useful for sub-THz and THz emitters, filters, and detectors.

M. Steller - One of the best experts on this subject based on the ideXlab platform.

  • The Solar Orbiter Radio and Plasma Waves (RPW) instrument
    Astronomy & Astrophysics, 2020
    Co-Authors: Milan Maksimovic, Stuart D. Bale, T. Chust, Yu. V. Khotyaintsev, V. Krasnoselskikh, Matthieu Kretzschmar, D. Plettemeier, Helmut O. Rucker, Jan Soucek, M. Steller
    Abstract:

    The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is described in this paper. This instrument is designed to measure in-situ magnetic and electric fields and Waves from t ...

  • The Solar Orbiter Radio and Plasma Waves (RPW) instrument
    Astronomy & Astrophysics, 2020
    Co-Authors: Milan Maksimovic, Stuart D. Bale, T. Chust, Yu. V. Khotyaintsev, V. Krasnoselskikh, Matthieu Kretzschmar, D. Plettemeier, Helmut O. Rucker, Jan Soucek, M. Steller
    Abstract:

    The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is described in this paper. This instrument is designed to measure in-situ magnetic and electric fields and Waves from the continuous to a few hundreds of kHz. RPW will also observe solar radio emissions up to 16 MHz. The RPW instrument is of primary importance to the Solar Orbiter mission and science requirements since it is essential to answer three of the four mission overarching science objectives. In addition RPW will exchange on-board data with the other in-situ instruments in order to process algorithms for interplanetary shocks and type III langmuir Waves detections.

A. L. Rakhmanov - One of the best experts on this subject based on the ideXlab platform.

  • terahertz josephson Plasma Waves in layered superconductors spectrum generation nonlinear and quantum phenomena
    Reports on Progress in Physics, 2010
    Co-Authors: Sergey Savelev, A. L. Rakhmanov, V A Yampolskii, Franco Nori
    Abstract:

    The recent growing interest in terahertz (THz) and sub-THz science and technology is due to its many important applications in physics, astronomy, chemistry, biology and medicine, including THz imaging, spectroscopy, tomography, medical diagnosis, health monitoring, environmental control, as well as chemical and biological identification. We review the problem of linear and nonlinear THz and sub-THz Josephson Plasma Waves in layered superconductors and their excitations produced by moving Josephson vortices. We start by discussing the coupled sine-Gordon equations for the gauge-invariant phase difference of the order parameter in the junctions, taking into account the effect of breaking the charge neutrality, and deriving the spectrum of Josephson Plasma Waves. We also review surface and waveguide Josephson Plasma Waves. The spectrum of these Waves is presented, and their excitation is discussed. We review the propagation of weakly nonlinear Josephson Plasma Waves below the Plasma frequency, ωJ, which is very unusual for Plasma-like excitations. In close analogy to nonlinear optics, these Waves exhibit numerous remarkable features, including a self-focusing effect and the pumping of weaker Waves by a stronger one. In addition, an unusual stop-light phenomenon, when ∂ω/∂k ≈ 0, caused by both nonlinearity and dissipation, can be observed in the Josephson Plasma Waves. At frequencies above ωJ, the current-phase nonlinearity can be used for transforming continuous sub-THz radiation into short, strongly amplified, pulses. We also present quantum effects in layered superconductors, specifically, the problem of quantum tunneling of fluxons through stacks of Josephson junctions. Moreover, the nonlocal sine-Gordon equation for Josephson vortices is reviewed. We discuss the Cherenkov and transition radiations of the Josephson Plasma Waves produced by moving Josephson vortices, either in a single Josephson junction or in layered superconductors. Furthermore, the expression for the Cherenkov cone of the excited Josephson Plasma Waves is derived. We also discuss the problem of coherent radiation (superradiance) of the THz Waves by exciting uniform Josephson oscillations. The effects reviewed here could be potentially useful for sub-THz and THz emitters, filters and detectors.

  • Surface josephson Plasma Waves in layered superconductors above the Plasma frequency: Evidence for a negative index of refraction
    Physical Review Letters, 2010
    Co-Authors: V. A. Golick, D. V. Kadygrob, V. A. Yampol'skii, B A Ivanov, A. L. Rakhmanov, Franco Nori
    Abstract:

    We predict a new branch of surface Josephson Plasma Waves (SJPWs) in layered superconductors for frequencies higher than the Josephson Plasma frequency. In this frequency range, the permittivity tensor components along and transverse to the layers have different signs, which is usually associated with negative refraction. However, for these frequencies, the bulk Josephson Plasma Waves cannot be matched with the incident and reflected Waves in the vacuum, and, instead of the negative-refractive properties, abnormal surface modes appear within the frequency band expected for bulk modes. We also discuss the excitation of high-frequency SJPWs by means of the attenuated-total-reflection method.

  • terahertz josephson Plasma Waves in layered superconductors spectrum generation nonlinear and quantum phenomena
    arXiv: Superconductivity, 2009
    Co-Authors: Sergey Savelev, A. L. Rakhmanov, V A Yampolskii, Franco Nori
    Abstract:

    The recent growing interest in terahertz (THz) and sub-THz science and technology is due to its many important applications in physics, astronomy, chemistry, biology, and medicine. We review the problem of linear and non-linear THz and sub-THz Josephson Plasma Waves in layered superconductors and their excitations produced by moving Josephson vortices. We start by discussing the coupled sine-Gordon equations for the gauge-invariant phase difference of the order parameter in the junctions, taking into account the effect of breaking the charge neutrality, and deriving the spectrum of Josephson Plasma Waves. We also review surface and waveguide Josephson Plasma Waves. We review the propagation of weakly nonlinear Josephson Plasma Waves below the Plasma frequency, which is very unusual for Plasma-like excitations. In close analogy to nonlinear optics, these Waves exhibit numerous remarkable features, including a self-focusing effect, and the pumping of weaker Waves by a stronger one. We also present quantum effects in layered superconductors, specifically, the problem of quantum tunnelling of fluxons through stacks of Josephson junctions. We discuss the Cherenkov and transition radiations of the Josephson Plasma Waves produced by moving Josephson vortices. We also discuss the problem of coherent radiation (superradiance) of the THz Waves by exciting uniform Josephson oscillations. The effects reviewed here could be potentially useful for sub-THz and THz emitters, filters, and detectors.

Milan Maksimovic - One of the best experts on this subject based on the ideXlab platform.

  • The Solar Orbiter Radio and Plasma Waves (RPW) instrument
    Astronomy & Astrophysics, 2020
    Co-Authors: Milan Maksimovic, Stuart D. Bale, T. Chust, Yu. V. Khotyaintsev, V. Krasnoselskikh, Matthieu Kretzschmar, D. Plettemeier, Helmut O. Rucker, Jan Soucek, M. Steller
    Abstract:

    The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is described in this paper. This instrument is designed to measure in-situ magnetic and electric fields and Waves from t ...

  • The Solar Orbiter Radio and Plasma Waves (RPW) instrument
    Astronomy & Astrophysics, 2020
    Co-Authors: Milan Maksimovic, Stuart D. Bale, T. Chust, Yu. V. Khotyaintsev, V. Krasnoselskikh, Matthieu Kretzschmar, D. Plettemeier, Helmut O. Rucker, Jan Soucek, M. Steller
    Abstract:

    The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is described in this paper. This instrument is designed to measure in-situ magnetic and electric fields and Waves from the continuous to a few hundreds of kHz. RPW will also observe solar radio emissions up to 16 MHz. The RPW instrument is of primary importance to the Solar Orbiter mission and science requirements since it is essential to answer three of the four mission overarching science objectives. In addition RPW will exchange on-board data with the other in-situ instruments in order to process algorithms for interplanetary shocks and type III langmuir Waves detections.

T. Chust - One of the best experts on this subject based on the ideXlab platform.

  • The Solar Orbiter Radio and Plasma Waves (RPW) instrument
    Astronomy & Astrophysics, 2020
    Co-Authors: Milan Maksimovic, Stuart D. Bale, T. Chust, Yu. V. Khotyaintsev, V. Krasnoselskikh, Matthieu Kretzschmar, D. Plettemeier, Helmut O. Rucker, Jan Soucek, M. Steller
    Abstract:

    The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is described in this paper. This instrument is designed to measure in-situ magnetic and electric fields and Waves from t ...

  • The Solar Orbiter Radio and Plasma Waves (RPW) instrument
    Astronomy & Astrophysics, 2020
    Co-Authors: Milan Maksimovic, Stuart D. Bale, T. Chust, Yu. V. Khotyaintsev, V. Krasnoselskikh, Matthieu Kretzschmar, D. Plettemeier, Helmut O. Rucker, Jan Soucek, M. Steller
    Abstract:

    The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is described in this paper. This instrument is designed to measure in-situ magnetic and electric fields and Waves from the continuous to a few hundreds of kHz. RPW will also observe solar radio emissions up to 16 MHz. The RPW instrument is of primary importance to the Solar Orbiter mission and science requirements since it is essential to answer three of the four mission overarching science objectives. In addition RPW will exchange on-board data with the other in-situ instruments in order to process algorithms for interplanetary shocks and type III langmuir Waves detections.