Josephson vortex lattices as scatterers of terahertz radiation: Giant magneto-optical effect and Doppler effect using terahertz tunable photonic crystals
Sergey Savel’ev, A. L. Rakhmanov, Franco Nori
DOI 10.1103/PhysRevB.74.184512 · Physical Review B
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Abstract
The Josephson vortex (JV) lattice generated by the in-plane magnetic field Hab is a periodic array that scatters Josephson plasma waves (JPWs) in layered superconductors. This produces a photonic band gap structure, i.e. terahertz (THz) photonic crystal, with easily tunable forbidden zones, or gaps, controlled either by the in-plane magnetic field or the transverse transport current J⊥ flowing across the superconducting layers. A giant magneto-optical effect, that is a strong dependence of the reflection and transmission coefficients on the applied in-plane magnetic field Hab, is predicted. A relatively small change of Hab can switch the sample from fully transparent to fully reflective within given frequency windows. Thus, the material can change from a THz glass to a mirror by merely changing either Hab or J⊥. The described effects might be useful for development switchable “glass/mirrors” THz filters tuned by either Hab or J⊥.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2212 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | onset |
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