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EnglishPrevious works ascribe the broadband high-reflectivity features of high-contrast gratings (HCGs) to dual-mode interference effects occurring in the grating bars, which are a characteristic of their near-wavelength operation regime. Using this fundamental characteristic this work exploits a bimodal Fabry-Pérot interferometer approach to better understand the HCG physics. This analytic framework allows to explain the 100% reflectivity peaks at the basis of the broadband operation, predicting their positions by closed-form expressions. A design strategy based on this approach is then presented, including a discussion on the impact of fabrication tolerances on the HCG performance.
Bimodal Operation of High-Contrast Gratings: The Generalized Fabry-Pérot Perspective / Tibaldi, A.; Debernardi, P.; Orta, R.. - ELETTRONICO. - (2019), pp. 3812-3816. ((Intervento presentato al convegno 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring) tenutosi a Roma nel 17-20 giugno 2019 [10.1109/PIERS-Spring46901.2019.9017611].
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| Titolo: | Bimodal Operation of High-Contrast Gratings: The Generalized Fabry-Pérot Perspective | |
| Autori: | ||
| Data di pubblicazione: | 2019 | |
| Abstract: | Previous works ascribe the broadband high-reflectivity features of high-contrast gratings (HCGs) ...to dual-mode interference effects occurring in the grating bars, which are a characteristic of their near-wavelength operation regime. Using this fundamental characteristic this work exploits a bimodal Fabry-Pérot interferometer approach to better understand the HCG physics. This analytic framework allows to explain the 100% reflectivity peaks at the basis of the broadband operation, predicting their positions by closed-form expressions. A design strategy based on this approach is then presented, including a discussion on the impact of fabrication tolerances on the HCG performance. | |
| ISBN: | 978-1-7281-3403-1 | |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| 2019Tibaldi_PIERS_FPI_20190315.pdf | 2019Tibaldi_PIERS_FPI_20190315 | 2. Post-print / Author's Accepted Manuscript | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
| 09017611.pdf | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
http://hdl.handle.net/11583/2800634
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