Silicon diffraction gratings for use in the far and extreme ultraviolet

Details Silicon diffraction gratings for use in the far and extreme ultraviolet Silicon diffraction gratings for use in the far and extreme ultraviolet

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.3114..580b&link_type=abstract

Proc. SPIE Vol. 3114, p. 580-585, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII, Oswald H. Siegmund; Mark A. Gumm

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We report the fabrication and evaluation of silicon diffraction gratings for use in the far- and extreme- ultraviolet. An interference technique was used to expose a layer of photoresist on a 10 cm silicon wafer in a series of parallel strips. V-shaped grooves were then etched into the wafer anisotropically. Diffraction efficiencies for a first pair of gratings at groove periods of 1.0 and 2.5 micrometers were measured. The process leaves much room for refinement, but shows promise in that the gratings produce clear diffraction orders with reasonable efficiency and have groove facets free of pitting or sharp ridges.

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