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http://hdl.handle.net/20.500.12386/27973
Title: | Surface relief gratings manufactured by lithographic means being a candidate for VLT MOONS instrument's main dispersers | Authors: | Harzendorf, Torsten Michaelis, Dirk Flügel-Paul, Thomas BIANCO, ANDREA OLIVA, Ernesto Zeitner, Uwe |
Issue Date: | 2018 | Volume: | Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III | Editors: | Navarro, Ramón ; Geyl, Roland | Series: | PROCEEDINGS OF SPIE | Number: | 10706 | First Page: | 1070621 | Abstract: | Surface relief gratings are well-established elements for high power laser applications, e.g. ultra-short pulse compression. A binary submicron period profile, realized by e-beam lithography and reactive ion beam etching in a dielectric material, is utilized for nearly one-hundred percent diffraction efficiency. Because these gratings are manufactured without any replication techniques, a high wave front accuracy and a low stray light background can be achieved. Spectroscopic applications require additional properties, i.e. a larger spectral bandwidth and Off-Littrow operation. We present new approaches for surface relief gratings realized either via multi-level staircase profiles or exploiting sub-wavelength features. The RVS spectrometer grating in ESA's GAIA mission is a prominent example where these techniques are already in use. The current contribution focuses on the results achieved during a pre-development performed for the MOONS instrument intended to operate at VLT. | Conference Name: | Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III | Conference Place: | Austin, Texas, United States | Conference Date: | 10-15 June, 2018 | URI: | http://hdl.handle.net/20.500.12386/27973 | URL: | https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10706/2313164/Surface-relief-gratings-manufactured-by-lithographic-means-being-a-candidate/10.1117/12.2313164.full | ISSN: | 0277-786X | ISBN: | 9781510619586 | DOI: | 10.1117/12.2313164 | Bibcode ADS: | 2018SPIE10706E..21H | Fulltext: | open |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
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1070621.pdf | Pdf editoriale | 1.39 MB | Adobe PDF | View/Open |
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