Share Email Print
cover

Proceedings Paper

Infrared achromatic phase shifters using modulated total internal reflection
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

We propose a new family of achromatic phase shifters that uses the modulated total internal reflection (TIR) phenomenon. These components can be seen as enhanced Fresnel rhombs for infrared applications like nulling interferometry and polarimetry. The TIR phenomenon comes with a differential phase shift between the polarization components of the incident light. Modulating the index transition at the TIR interface allows compensating for the intrinsic material dispersion in order to make the subsequent phase shift achromatic over broad bands. The modulation can be induced by a thin film of a well-chosen medium or a subwavelength grating whose parameters are specially optimized. We present results from theoretical simulations together with preliminary fabrication outcomes.

Paper Details

Date Published: 28 June 2006
PDF: 11 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 62682J (28 June 2006); doi: 10.1117/12.671572
Show Author Affiliations
Dimitri Mawet, Institut d'Astrophysique et de Géophysique de Liège, Univ. de Liège (Belgium)
Cédric Lenaerts, HOLOLAB, Univ. de Liège (Belgium)
Pierre Riaud, Institut d'Astrophysique et de Géophysique de Liège, Univ. de Liège (Belgium)
Denis Vandormael, Ctr. Spatial de Liège (Belgium)
Jérome Loicq, Ctr. Spatial de Liège (Belgium)
David Verstraeten, Ctr. Spatial de Liège (Belgium)
Karl Fleury, Ctr. Spatial de Liège (Belgium)
Serge Habraken, HOLOLAB, Univ. de Liège (Belgium)
Jean Surdej, Institut d'Astrophysique et de Géophysique de Liège, Univ. de Liège (Belgium)


Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

© SPIE. Terms of Use
Back to Top