Over-coupled reflective metasurfaces achieve octave-spanning THz quarter-wave plates covering 0.25-3 THz with axial ratio below 3 dB and over 80% conversion efficiency.
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Theoretical prediction that light pulses from optical to X-ray regimes cause sub-100 fs demagnetization via electronic excitation and electron redistribution in the magneto-sensitive band, without significant phonon or Heisenberg exchange contributions.
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Octave-Spanning Terahertz Quarter-Wave Plates Based on Over-Coupled Fabry-P\'erot Resonances in Reflective Metal-Dielectric-Metal Metasurfaces
Over-coupled reflective metasurfaces achieve octave-spanning THz quarter-wave plates covering 0.25-3 THz with axial ratio below 3 dB and over 80% conversion efficiency.
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Electronic mechanism of sub-100-fs demagnetization induced by a femtosecond light pulse
Theoretical prediction that light pulses from optical to X-ray regimes cause sub-100 fs demagnetization via electronic excitation and electron redistribution in the magneto-sensitive band, without significant phonon or Heisenberg exchange contributions.