High-Power Damage-Resistant XUV Bandpass Filter
Transmits XUV beams in a broad energy range High damage threshold Endures IR pump energy up to hundreds of mJ Low-cost and simple to implement
Medical diagnostics XUV lithography Radiography
HHG generated pulses in the XUV and SXR spectral ranges, from several eV to keV energies, pass through the MCP filter while IR and NIR wavelengths are reflected, allowing for rejection of up to hundreds of mJΓÇÖs of pump light, an amount unmatched by any other technique. The filtering works analogous to that of a microwave door, where the wavelengths smaller than the dimensions of the periodic structure can propagate through, while those larger become evanescent and reflect off the structure. The MCP is fabricated from a resistive material, such as glass, with a dense array of parallel microchannels (typically 5-25 micrometers in diameter) leading from one surface to the other. Since this XUV filter blocks infrared pump source light, it is especially useful for next-generation mid-infrared pump lasers, the future for generating even shorter attosecond pulses.
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