Monday, March 18, 2013

1303.3680 (T. N. Rokhmanova et al.)

Self-induced THz-waves transmissivity of waveguides with finite-length
layered superconductors
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T. N. Rokhmanova, S. S. Apostolov, Z. A. Maizelis, V. A. Yampol'skii, Franco Nori
We predict and study theoretically a novel nonlinear electromagnetic phenomenon in a sample of layered superconductor of finite length placed in a waveguide with ideal walls. Two geometries are considered here: when the superconducting layers are parallel or perpendicular to the waveguide axis. We show that the transmittance of the superconductor slab can vary over a wide range, from nearly zero to one, when changing the incident wave amplitude. Thus, one can induce the total transmission or reflection of the incident wave by just changing its amplitude. Moreover, the dependence of the superconductor transmittance on the incident wave amplitude has a hysteretic behavior with jumps. This remarkable phenomenon of self-induced transparency can be observed even at small amplitudes, if the wave frequency $\omega$ is close to the cutoff frequency for linear Josephson plasma waves.
View original: http://arxiv.org/abs/1303.3680

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