Color effects based on resonant waveguide grating embedded in a luminescent sol-gel layer

Marie Traynar; Léa Marichez; Daniel Zambon; François Réveret; Audrey Potdevin; Damien Boyer; Arnaud Valour; Isabelle Verrier; Nicolas Crespo-Monteiro; Geneviève Chadeyron; Yves Jourlin

doi:10.1117/12.3017373

18 June 2024 Color effects based on resonant waveguide grating embedded in a luminescent sol-gel layer

Marie Traynar, Léa Marichez, Daniel Zambon, François Réveret, Audrey Potdevin, Damien Boyer, Arnaud Valour, Isabelle Verrier, Nicolas Crespo-Monteiro, Geneviève Chadeyron, Yves Jourlin

Author Affiliations +

Proceedings Volume 13015, Photosensitive Materials and their Applications III; 130150E (2024) https://doi.org/10.1117/12.3017373
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

A subwavelength structure made of a resonant waveguide grating embedded in a luminescent sol-gel layer enables a dual color effect. The resonant waveguide grating consists of a diffraction grating and a high refractive index guiding layer using a TiO₂ based sol-gel with a higher refractive index (n_g = 2.2) than its silica sol-gel surroundings (n_s=1.5). The resonant waveguide grating is designed to achieve visible resonant reflection of TE polarized incident waves in the green color spectrum. The resonant structure is then coated with a thick layer of silicone doped with a luminescent material of formulation Y₂O₂S:Eu³⁺. This latter leads to emission in the red domain under UV excitation. This quasi-symmetric structure is transparent in the visible range for observing the various phenomena. Nano-imprint technology is used for the fabrication of the grating on the sol gel layer to demonstrate its fabrication potential. Therefore, it is a low-cost fabrication technique used to replicate the microstructure, which can be up scaled for industrial applications. Preliminary results will be presented at the conference, covering modelling through the design of the optimized microstructures. Experimental results will be showcased with first demonstrators comprising Nanoimprinted sol-gel layers with a resonant waveguide grating and a luminescent layer. Experimental measurements will be carried out to characterise both the optical performance of the luminescent coating and the resonant waveguide grating.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Marie Traynar, Léa Marichez, Daniel Zambon, François Réveret, Audrey Potdevin, Damien Boyer, Arnaud Valour, Isabelle Verrier, Nicolas Crespo-Monteiro, Geneviève Chadeyron, and Yves Jourlin "Color effects based on resonant waveguide grating embedded in a luminescent sol-gel layer", Proc. SPIE 13015, Photosensitive Materials and their Applications III, 130150E (18 June 2024); https://doi.org/10.1117/12.3017373

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available