Abstract
The spectral extension of isolated attosecond pulses into the water window (284 eV – 543 eV) has been one of the primary goals in high harmonic generation (HHG) for the past several years [1]. Achieving this would enable the probing of ultrafast processes at the K-shell absorption edges of biologically important elements such as carbon, nitrogen and oxygen. We demonstrate water window attosecond pulses isolated at 500 eV driven by carrier-envelope phase (CEP)-stable, 2-cycle pulses at 1.85 µm.
© 2015 IEEE
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