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Proceedings Paper

High-contrast gratings as generalized Fabry-Pérot interferometers
Author(s): Alberto Tibaldi; Renato Orta; Pierluigi Debernardi
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Paper Abstract

The extraordinary reflectivity and resonance features of high-contrast gratings are consequences of the interference of two grating modes. From this observation, an extension of the Fabry-P´erot interferometer to the bimodal case is proposed, in view of describing rigorously the physical mechanisms occurring in the grating. The closedform expressions of the interferometer reflection and transmission, obtained starting from a novel parametrization of the unitary symmetric 3 × 3 scattering matrix characterizing the bar-air interface, allow a complete exploration of the device parameter space, explaining and predicting phenomena such as ultra-broadband quasi-100% reflectivity.

Paper Details

Date Published: 21 February 2018
PDF: 8 pages
Proc. SPIE 10542, High Contrast Metastructures VII, 1054203 (21 February 2018); doi: 10.1117/12.2286241
Show Author Affiliations
Alberto Tibaldi, IEIIT/CNR (Italy)
Politecnico di Torino (Italy)
Renato Orta, IEIIT/CNR (Italy)
Politecnico di Torino (Italy)
Pierluigi Debernardi, IEIIT/CNR (Italy)
Politecnico di Torino (Italy)


Published in SPIE Proceedings Vol. 10542:
High Contrast Metastructures VII
Connie J. Chang-Hasnain; Andrei Faraon; Fumio Koyama; Weimin Zhou, Editor(s)

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