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Proceedings Paper

Multi-phase-level diffractive elements realized by binary effective medium patterns
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Paper Abstract

Subwavelength structures open up the possibility to create an artificial index material which enables the realization of high-efficient diffractive structures. This can be used to generate optical elements with nearly arbitrary phase profiles. We demonstrate the realization of computer-generated holograms based on this effective medium approach. High diffraction efficiencies can be realized by multi-phase-level modulation based on two-dimensional binary nanostructures. The fabrication is performed by one lithographical step using a high-speed e-beam writer which allows high-resolution patterning even on large areas. A diffractive element in the visible range is experimentally demonstrated using the presented effective index approach.

Paper Details

Date Published: 16 February 2010
PDF: 7 pages
Proc. SPIE 7591, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics III, 75910Z (16 February 2010); doi: 10.1117/12.843526
Show Author Affiliations
Wiebke Freese, Friedrich-Schiller-Univ. Jena (Germany)
Thomas Kämpfe, Friedrich-Schiller-Univ. Jena (Germany)
Ernst-Bernhard Kley, Friedrich-Schiller-Univ. Jena (Germany)
Andreas Tünnermann, Friedrich-Schiller-Univ. Jena (Germany)

Published in SPIE Proceedings Vol. 7591:
Advanced Fabrication Technologies for Micro/Nano Optics and Photonics III
Winston V. Schoenfeld; Jian Jim Wang; Marko Loncar; Thomas J. Suleski, Editor(s)

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