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Proceedings Paper

Investigation on the angular dependent reflectance of coupled high-contrast gratings
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Paper Abstract

In this contribution we discuss configurations of stacked silicon high contrast gratings (HCGs) which are separated by a thin silicon dioxide grating such that they are coupled via their near-fields. For a given configuration altering incidence angle allows to either benefit from the optical performance of two separated HCGs or one single grating with enhanced thickness. This effect can serve to realize filters with tailored optical properties and for diffractive cavity couplers. We experimentally demonstrate the coupling effect on a stack of two HCGs for a wavelength of 1550nm and transverse-magnetic polarization. The investigated structure provides a nearly angular independent high reflectance.

Paper Details

Date Published: 19 February 2014
PDF: 6 pages
Proc. SPIE 8995, High Contrast Metastructures III, 89950B (19 February 2014); doi: 10.1117/12.2039711
Show Author Affiliations
Stefanie Kroker, Friedrich-Schiller-Univ. Jena (Germany)
Thomas Käsebier, Friedrich-Schiller-Univ. Jena (Germany)
Ernst-Bernhard Kley, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Andreas Tünnermann, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)

Published in SPIE Proceedings Vol. 8995:
High Contrast Metastructures III
Connie J. Chang-Hasnain; David Fattal; Fumio Koyama; Weimin Zhou, Editor(s)

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