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Annular Groove Phase Mask Coronagraph

Mawet, D. and Riaud, P. and Absil, O. and Surdej, J. (2005) Annular Groove Phase Mask Coronagraph. Astrophysical Journal, 633 (2). pp. 1191-1200. ISSN 0004-637X. doi:10.1086/462409.

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We present a new phase mask coronagraph consisting in an optical vortex induced by a space-variant surface relief subwavelength grating. Phase mask coronagraphy is a recent technique aiming at accommodating both high dynamic and high angular resolution imaging of faint sources around bright objects such as exoplanets orbiting their parent stars or host galaxies of active galactic nuclei. Subwavelength gratings are known to be artificially birefringent. Their unique dispersive characteristics can be controlled through the grating geometry in order to synthesize achromatic phase shifters. We show that implementing them in a ring-shaped way produces a fully symmetric and achromatic coronagraph without any gap or "dead zone." The practical manufacturing of the device is also discussed.

Item Type:Article
Related URLs:
URLURL TypeDescription
Mawet, D.0000-0002-8895-4735
Absil, O.0000-0002-4006-6237
Surdej, J.0000-0002-7005-1976
Additional Information:© 2005 American Astronomical Society. Received 2005 May 10; accepted 2005 July 17. D. M. acknowledges the financial support of the Belgian "Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture." P. R. and J. S. acknowledge the financial support of the "Pôle d'Attraction Inter-Universitaire."
Funding AgencyGrant Number
Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)UNSPECIFIED
Pôle d'Attraction Inter-UniversitaireUNSPECIFIED
Subject Keywords:circumstellar matter; planetary systems; techniques: high angular resolution
Issue or Number:2
Record Number:CaltechAUTHORS:20150519-132103307
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Official Citation:Annular Groove Phase Mask Coronagraph D. Mawet et al. 2005 ApJ 633 1191
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57663
Deposited By: Ruth Sustaita
Deposited On:19 May 2015 20:52
Last Modified:10 Nov 2021 21:53

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