Near-normal-incidence extreme-ultraviolet efficiency of a flat crystalline anisotropically etched blazed grating.

نویسندگان

  • Michael P Kowalski
  • Ralf K Heilmann
  • Mark L Schattenburg
  • Chih-Hao Chang
  • Frederick B Berendse
  • William R Hunter
چکیده

We have measured the extreme-ultraviolet (EUV) efficiency at an angle of incidence of 10 degrees of a flat crystalline anisotropically etched blazed grating. The measured efficiencies are high for uncoated gratings and agree well with a calculated model derived from a reasonable estimate of the groove profile. The highest groove efficiencies derived from the measurements are 48.8% at 19.07 nm and 64.1% at 16.53 nm for the -2 and -3 orders, respectively, which are comparable to the best values obtained yet from a holographic ion-etched blazed grating. This presents opportunities to instrument designs for high-resolution EUV spectroscopy in astrophysics where high efficiency in high orders is desirable.

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عنوان ژورنال:
  • Applied optics

دوره 45 8  شماره 

صفحات  -

تاریخ انتشار 2006