Nonlinear focusing of terahertz laser beam using a layered superconductor

@article{Ovcharenko2021NonlinearFO,
  title={Nonlinear focusing of terahertz laser beam using a layered superconductor},
  author={H. V. Ovcharenko and Z. A. Maizelis and S. S. Apostolov and V. A. Yampol’skii},
  journal={Physical Review B},
  year={2021}
}
We theoretically study the propagation of a Terahertz (THz) Gaussian beam through a thin sample of layered superconductor. We consider the beam axis and the superconducting layers to be perpendicular to the sample interface, while the electric field in the beam is perpendicular to the layers. We show that, in such a geometry, the Josephson current between the superconducting layers supports lensing of the beam instead of divergence on the Rayleigh range. Moreover, due to the nonlinearity, the… 

Figures from this paper

References

SHOWING 1-10 OF 38 REFERENCES

Josephson plasmonics in layered superconductors

Abstract We review the optical physics of Josephson plasmons in cuprate superconductors. These coherent charge modes arise from tunneling of the superfluid between superconducting planes and exhibit

Optical excitation of Josephson plasma solitons in a cuprate superconductor.

The JPS becomes observable as it causes a transparency window in the opaque spectral region immediately below the plasma resonance, which may lead to new applications in terahertz-frequency plasmonics, in information storage and transport and in the manipulation of high-Tc superconductivity.

Terahertz Josephson plasma waves in layered superconductors: spectrum, generation, nonlinear and quantum phenomena

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

Design of a Pre-Bunched THz Free Electron Laser

Terahertz (THz) radiation has attracted much attention in new scientific and industrial applications. There has been significant recent progress in generating THz with accelerators. To investigate

Measuring Complex Refractive Indices of a Nanometer-Thick Superconducting Film Using Terahertz Time-Domain Spectroscopy with a 10 Femtoseconds Pulse Laser

Superconducting thin films are widely applied in various fields, including switching devices, because of their phase transition behaviors in relation to temperature changes. Therefore, it is

Phase dynamics in a stack of inductively coupled intrinsic Josephson junctions and terahertz electromagnetic radiation

The Josephson effect is a phenomenon of current flow across two weakly linked superconductors separated by a thin barrier, i.e. a Josephson junction, associated with coherent quantum tunneling of

Design of a Multistep Phase Mask for High-Energy Terahertz Pulse Generation by Optical Rectification

A new scheme for generating high-energy terahertz (THz) pulses based on using a multistep phase mask (MSPM) is suggested and analyzed. The mask is placed on the entrance surface of the nonlinear

A Review of High-Gain Free-Electron Laser Theory

High-gain free-electron lasers, conceived in the 1980s, are nowadays the only bright sources of coherent X-ray radiation available. In this article, we review the theory developed by R. Bonifacio and

Excitation of plasma oscillations during the motion of Josephson vortices in layered superconductors

The electric and magnetic fields arising during uniform motion of a vortex lattice in a magnetic field oriented parallel to the conducting layers are calculated in an exactly solvable model. For low

Widely tunable compact terahertz gas lasers

A compact, widely frequency-tunable, extremely bright source of terahertz radiation: a gas-phase molecular laser based on rotational population inversions optically pumped by a quantum cascade laser is introduced.