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L'article "Lithium niobate waveguides with high-index contrast and preserved nonlinearity fabricated by a high vacuum vapor-phase proton exchange" a reçu un "Editor's Pick"

L'article "Lithium niobate waveguides with high-index contrast and preserved nonlinearity fabricated by a high vacuum vapor-phase proton exchange", co-écrit par des chercheurs de INPHYNI et de l'Université de Iasi (Roumanie), a été mis en avant par l'éditeur lors de sa publication dans Photonics Research.

L' "Editor's Picks" met en exergue des articles d'excellente qualité scientifique et représentatif du travail réalisé dans un domaine spécifique.

 

Résumé:

Highly confining waveguides (Δ𝑛(𝑒)>0.1) without a degraded nonlinear coefficient and low propagation losses have been fabricated in lithium niobate (LN) by a new process that we called high vacuum vapor-phase proton exchange (HiVac-VPE). Index contrast, index profile, nonlinearity, and crystallographic phases are carefully investigated. Original analysis of index profiles indicates that the waveguides contain sub-layers whose depths depend on the exchange durations. Propagation behavior, propagation losses, and second-harmonic generation response of HiVac-VPE channel waveguides are investigated at telecom wavelength. The results recommend HiVac-VPE as a very promising technique for fabricating efficient nonlinear photonic integrated circuits in LN crystals.

 

Référence

"Lithium niobate waveguides with high-index contrast and preserved nonlinearity fabricated by a high vacuum vapor-phase proton exchange"

Alicia Petronela Rambu, Alin Marian Apetrei, Florent Doutre, Hervé Tronche, Vasile Tiron, Marc de Micheli, and Sorin Tascu

Photonics Research 8 (2020) 8

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