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Mid-IR AGPMs for ELT applications
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
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2014 (English)In: GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY V, 2014, Vol. 9147, 914799Conference paper, Published paper (Refereed)
Abstract [en]

The mid-infrared region is well suited for exoplanet detection thanks to the reduced contrast between the planet and its host star with respect to the visible and near-infrared wavelength regimes. This contrast may be further improved with Vector Vortex Coronagraphs (VVCs), which allow us to cancel the starlight. One flavour of the VVC is the AGPM (Annular Groove Phase Mask), which adds the interesting properties of subwavelength gratings (achromaticity, robustness) to the already known properties of the VVC. In this paper, we present the optimized designs, as well as the expected performances of mid-IR AGPMs etched onto synthetic diamond substrates, which are considered for the E-ELT/METIS instrument.

Place, publisher, year, edition, pages
2014. Vol. 9147, 914799
Series
Proceedings of SPIE, ISSN 0277-786X
Keyword [en]
Exoplanets detection, Mid-IR, Vector Vortex Coronagraphs, E-ELT/METIS instrument
National Category
Astronomy, Astrophysics and Cosmology Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-257485DOI: 10.1117/12.2056280ISI: 000354527800283ISBN: 978-0-8194-9615-7 (print)OAI: oai:DiVA.org:uu-257485DiVA: diva2:846469
Conference
5th Conference on Ground-Based and Airborne Instrumentation for Astronomy, JUN 22-26, 2014, Montreal, CANADA
Available from: 2015-08-17 Created: 2015-07-02 Last updated: 2015-11-11Bibliographically approved

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Forsberg, PontusKarlsson, MikaelCatalan, Ernesto Vargas

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