Ultrafast Modulation of Guided‐Mode Resonance in a Nonlinear Silicon Nitride Grating

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

Abstract Nonlinear optical interactions in nanostructures are crucial for both fundamental research and practical applications. The Kerr effect, a third‐order nonlinear phenomenon, causes anisotropic changes the refractive index of materials under intense laser illumination. However, this effect is intrinsically weak, limiting its utility free‐space nanophotonics. This work demonstrates an enhancement by over three orders magnitude through guided‐mode resonance dielectric diffraction grating with thickness less than 300 nm. study includes design, fabrication, transmittance measurements resonant silicon nitride crossed grating, illuminated short light pulses. Spectral shifts increasing pulse power observed, resulting 50% modulation enabling dynamic transitions between “Off ” “On” transmission states grating. Additionally, potential shaping demonstrated. These findings offer promising avenues developing advanced all‐optical devices

Language: Английский

Tapered fiber stress sensing based on soliton state tuning of mode-locked fiber laser with GO SA

Optics & Laser Technology, Journal Year: 2024, Volume and Issue: 177, P. 111148 - 111148

Published: May 20, 2024

Language: Английский