XUV Phase Retarder
Our XUV Phase Retarder acts as a quarter waveplate to turn linearly polarized XUV light into circularly polarized light without introducing noticeable dispersion. The phase retarder achieves closetocircular polarization of Pc=0.75 and obtains > 25% transmission around 66 eV photon energy, where the Ni M2/M3 edge locates [1].
A broad spectral range from 40 to 85 eV 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 the s- and p-polarization components of a linearly 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.
Key Product Features:
Up to ≈ 40% max transmission
Create circularly polarized XUV light without adding dispersion(ideal for attosecond applications)
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
Characteristics:
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)
1Degree of Ellipticity expressed as Stokes Parameters Pc=S3/S0
Phase and Transmission, p-Pol
Phase and Transmission, s-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%
References:
[1] Siegrist, F., Gessner, J.A., Ossiander, M. et al. Light-wave dynamic control of magnetism.
Nature 571, 240-244(2019).
商品属性 [波长] 40-85 eV