CaltechAUTHORS
  A Caltech Library Service

Subwavelength gratings for phase mask coronagraphy: the 4QZOG and AGPM coronagraphs

Mawet, Dimitri and Riaud, Pierre (2006) Subwavelength gratings for phase mask coronagraphy: the 4QZOG and AGPM coronagraphs. In: Direct Imaging of Exoplanets: Science 8 Techniques. Proceedings IA U Colloquium. IAU Symposium and Colloquium Proceedings Series. No.200. Cambridge University Press , New York, NY, pp. 361-366. ISBN 9780521856072. https://resolver.caltech.edu/CaltechAUTHORS:20150520-090059986

[img] PDF - Published Version
See Usage Policy.

453kB

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20150520-090059986

Abstract

We present two new phase mask coronagraphs implemented with subwavelength diffractive optical elements. The first one is an evolution of the four quadrant phase mask coronagraph (FQPM), which resolves the π phase shift chromaticity issue: the four quadrant zeroth order grating (4QZOG). The second one is a totally new design consisting of an optical vortex induced by a space-variant grating: the annular groove phase mask (AGPM) coronagraph is fully symmetric and free from any "shaded zones". The potential performances of the 4QZOG and AGPM coronagraph are very good, ensuring, for instance, a theoretical contrast of 1.4 x 10^(-7) at 3λ/D over the whole K band. These coronagraphs could be used alone on single-pupil telescopes either in space or on the ground (with an adaptive optics system) to detect exoplanets.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1017/S1743921306009598DOIArticle
http://articles.adsabs.harvard.edu/full/2006dies.conf..361MADSArticle
ORCID:
AuthorORCID
Mawet, Dimitri0000-0002-8895-4735
Additional Information:© 2006 International Astronomical Union. Cambridge University Press. Provided by the NASA Astrophysics Data System. D. Mawet and P. Riaud acknowledges the financial support of the Belgian "Fonds pour la formation a la Recherche dans l'Industrie et dans l' Agriculture" and the "Pole d' Attraction Inter-Universitaire", respectively.
Funders:
Funding AgencyGrant Number
Fonds pour la formation a la Recherche dans l'Industrie et dans l' Agriculture (Belgian)UNSPECIFIED
Pole d' Attraction Inter-Universitaire (Belgian)UNSPECIFIED
Subject Keywords:High angular resolution, Phase mask coronagraphy, Achromatic phase shifters, Subwavelength gratings, Space-variant gratings, Optical vortices
Series Name:IAU Symposium and Colloquium Proceedings Series
Issue or Number:200
DOI:10.1017/S1743921306009598
Record Number:CaltechAUTHORS:20150520-090059986
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150520-090059986
Official Citation:Subwavelength gratings for phase mask coronagraphy: the 4QZOG and AGPM coronagraphs Mawet, D. & Riaud, P. Direct Imaging of Exoplanets: Science & Techniques. Proceedings of the IAU Colloquium #200, Edited by C. Aime and F. Vakili. Cambridge, UK: Cambridge University Press, 2006., pp.361-366
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57688
Collection:CaltechAUTHORS
Deposited By:INVALID USER
Deposited On:20 May 2015 16:27
Last Modified:10 Nov 2021 21:53

Repository Staff Only: item control page