Infrared Achromatic Phase Shifters using Modulated Total Internal Reflection
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.
Additional Information
© 2006 Society of Photo-Optical Instrumentation Engineers (SPIE). June 28, 2006. The first author acknowledges the financial support of the Belgian "Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture". The authors also acknowledge the financial support of ESA.Attached Files
Published - 396503.pdf
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Additional details
- Eprint ID
- 57847
- Resolver ID
- CaltechAUTHORS:20150527-091322264
- Fonds pour la Formation à la Recherche dans l'índustrie et dans l'Ágriculture (FRIA-Belgium)
- European Space Agency (ESA)
- Created
-
2015-05-27Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 6268