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21 February 2018 High-contrast gratings as generalized Fabry-Pérot interferometers
Alberto Tibaldi, Renato Orta, Pierluigi Debernardi
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Proceedings Volume 10542, High Contrast Metastructures VII; 1054203 (2018) https://doi.org/10.1117/12.2286241
Event: SPIE OPTO, 2018, San Francisco, California, United States
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.
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Alberto Tibaldi, Renato Orta, and Pierluigi Debernardi "High-contrast gratings as generalized Fabry-Pérot interferometers", Proc. SPIE 10542, High Contrast Metastructures VII, 1054203 (21 February 2018); https://doi.org/10.1117/12.2286241
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KEYWORDS
Interferometers
Optical design
Scattering
Reflectors
Dielectrics
Resonators
Vertical cavity surface emitting lasers
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