XUV Phase Retarder
Our XUV Phase Retarder acts as a quarter waveplate to turn linear polarized XUV light into circular polarized light without introducing noticeable dispersion. The phase retarder achieves close-to- circular polarization of Pc=0.75 and obtains > 25% transmission around 66eV photon energy, where the Ni M2/M3 edge locates [1]. A broad spectral range from 40 to 85eV is supported to cover the M2/ M3 edge of 3 transition metals - Fe, Co and Ni. The retarder uses a transmission optimized, four mirror grazing incidence reflection geometry that induces a quarter wave phase offset between -s and -p polarization component of a linear polarized input XUV beam. At the Ni M2/M3 transition up to 3% dichroism contrast is observed (i.e. > 85% of the theoretical value) [1]. A clear aperture of 3 mm will allow the low divergent XUV to pass through without clipping. Our XUV Phase Retarder is ideally geared to be combined with ultrafast high-harmonic XUV sources adding spin-sensitivity to conventional laser based pump-probe experiments via attosecond magnetic circular dichroism detection. | |
AURORA
Key Product Features:
Create circular polarized XUV light without adding dispersion (ideal for attosecond applications)
Up to ≈ 40% max transmission
Broad spectral range covering 40 – 85 eV
Compact design, with minimum change in the delay line
Entrance and exit iris diaphragms for alignment
Easy to implement in existing setups
Spectral Range | 40-85 eV |
Avg Transmission | >25% |
Max Ellipticity Pc1 | 0.75 @ 66 eV |
Extra Beam Path | 3 mm |
Clear Aperture | 3 mm |
Footprint | 40mm (D) x 92mm (L) |
Phase and Transmission, p-Pol Phase and Transmission, p-Pol
Element | Fe | Co | Ni |
Edge | M2 /M3 | M2 | M3 | M2 | M3 |
Energy | 52.7 eV | 58.9 eV | 59.9 eV | 66.2 eV | 68 eV |
Transmission | 9% | 17% | 18% | 26% | 30% |