Abstract-Transmission of terahertz waves through layered superconductors controlled by a dc magnetic field

S. S. Apostolov, Z. A. Maizelis, N. M. Makarov, F. Pérez-Rodríguez, T. N. Rokhmanova, and V. A. Yampol'skii

http://journals.aps.org/prb/abstract/10.1103/PhysRevB.94.024513

The transmission of THz electromagnetic waves via a slab of layered superconductor in the presence of dc magnetic field H0 is theoretically studied. We demonstrate that the external dc field turns the layered superconductor into nonuniform medium with spatially and frequency-dependent dielectric permittivity. Even a relatively weak dc magnetic field, when the superconductor is in the Meissner state, significantly affects the transmittance of the layered superconductor. Moreover, the proper choice of H0 can provide the perfect transparency of the slab. In addition, the dc magnetic field changes the dependence of the transmittance on the slab thickness, the frequency, and the incident angle of the wave. Thus, it can serve as an effective tool to control the transmissivity of layered superconductors.

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Abstract-Transmission of terahertz waves through layered superconductors controlled by a dc magnetic field

S. S. Apostolov, Z. A. Maizelis, N. M. Makarov, F. Pérez-Rodríguez, T. N. Rokhmanova, and V. A. Yampol’skii


http://journals.aps.org/prb/accepted/0407bO77Z9c1fa2016e682b515aebb6c2da83a754

The transmission of THz electromagnetic waves via a slab of layered superconductor in the presence of DC magnetic field H0 is theoretically studied. We demonstrate that the external DC field turns the layered superconductor into non-uniform medium with spatially and frequency dependent dielectric permittivity. Even relatively weak DC magnetic field, when the superconductor is in the Meissner state, significantly affects the transmittance of the layered superconductor. Moreover, the proper choice of H0 can provide the perfect transparency of the slab. In addition, the DC magnetic field changes the dependence of the transmittance on the slab thickness, the frequency, and the incident angle of the wave. Thus, it can serve as an effective tool to control the transmissivity of layered superconductors.

Abstract-Enhanced Transmission of Terahertz Radiation through Periodically Modulated Slabs of Layered Superconductors

D. V. Kadygrob, N. M. Makarov, F. Pérez-Rodríguez, T. M. Slipchenko, V. A. Yampol'skii

http://arxiv.org/abs/1206.6660

(Submitted on 28 Jun 2012)

We predict the enhanced transmissivity of modulated slabs of layered superconductors for terahertz radiation due to the diffraction of the incident wave and the resonance excitation of the eigenmodes. The electromagnetic field is transferred from the irradiated side of a slab of layered superconductor to the other one by excited waveguide modes (WGMs) which do not decay deep into the slab, contrary to metals, where the enhanced light transmission is caused by the excitation of the evanescent surface waves. We show that a series of resonance peaks (with $T \sim 1$) can be observed in the dependence of the transmittance $T$ on the varying incidence angle $\theta$, when the dispersion curve of the diffracted wave crosses successive dispersion curves for the WGMs.

Comments:	5 pages, 3 figures; submitted to PRL
Subjects:	Superconductivity (cond-mat.supr-con); Optics (physics.optics)
Cite as:	arXiv:1206.6660v1 [cond-mat.supr-con]