Paper 14092-100
Paper 14092-100
Efficient second harmonic generation in thin film lithium niobate nanowaveguides
15 April 2026 • 11:30 - 11:50 CEST | Churchill (Niveau/Level 1)
Abstract
Thin-Film Lithium Niobate (TFLN) makes the material’s wide transparency window and high nonlinearities accessible for tightly confined nanowaveguides. In our study, the second order nonlinearity is harnessed in a 600nm thick X-cut LN via quasi phase-matched operation. Low loss nanowaveguides are fabricated via Reactive Ion Etching and periodic poling is obtained by electric field inversion thanks to electrodes patterned on both sides of the waveguides. Poling is then monitored by Piezoresponse Force Microscopy. Second Harmonic Generation with a normalized conversion efficiency over 3000%/W/cm² is demonstrated.
Presenter
Nathanaëll Benon
Univ. Marie et Louis Pasteur (France), FEMTO-ST, CNRS (France)
Nathanaëll Benon is a second-year Ph.D student at Marie and Louis Pasteur University, affiliated with the FEMTO-ST Laboratory in Besançon, France. His research subject encompasses nonlinear photonics in lithium niobate thin films, focusing on second-order nonlinearities. He graduated in 2024 from Institut d’Optique Graduate School, with a double degree in the master Quantum, Light, Matter and Nanosciences, with specializations in optics and microfabrication. During their studies, Nathanaëll did an internship at the ‘Laboratoire Interuniversitaire des Systèmes Atmosphériques’ on Fourier Transform spectrometry of atmospheric gases. He completed his studies with a six-month internship at Fraunhofer IOSB, developing a polarimeter for the 2µm band.