A paper published in Photonics Research highlighted

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

The article "Lithium niobate waveguides with high-index contrast and preserved nonlinearity fabricated by a high vacuum vapor-phase proton exchange", written by scientists from INPHYNI in collaboration with the University of Iasi (Romania), has been highlighted by the Editor when published in Photonics Research.

Editor's Picks serve to highlight articles with excellent scientific quality and are representative of the work taking place in a specific field.

 

Abstract:

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.

 

Reference

"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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