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Proceedings Article

Infrared achromatic phase shifters using modulated total internal reflection

[+] Author Affiliations
Dimitri Mawet, Pierre Riaud, Jean Surdej

Institut d'Astrophysique et de Géophysique de Liège, Univ. de Liège (Belgium)

Cédric Lenaerts

HOLOLAB, Univ. de Liège (Belgium)

Denis Vandormael, Jérome Loicq, David Verstraeten, Karl Fleury

Ctr. Spatial de Liège (Belgium)

Serge Habraken

HOLOLAB, Univ. de Liège (Belgium) and Ctr. Spatial de Liège (Belgium)

Proc. SPIE 6268, Advances in Stellar Interferometry, 62682J (June 28, 2006); doi:10.1117/12.671572
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From Conference Volume 6268

  • Advances in Stellar Interferometry
  • John D. Monnier; Markus Schöller; William C. Danchi
  • Orlando, Florida , USA | May 24, 2006

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.

© (2006) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Dimitri Mawet ; Cédric Lenaerts ; Pierre Riaud ; Denis Vandormael ; Jérome Loicq, et al.
"Infrared achromatic phase shifters using modulated total internal reflection", Proc. SPIE 6268, Advances in Stellar Interferometry, 62682J (June 28, 2006); doi:10.1117/12.671572; http://dx.doi.org/10.1117/12.671572


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