Photonic Crystal Design for Bloch Surface Wave Sensing

• Type: Article in International Conference Proceedings Book
• Date: 2022

Authors

Dias, B (Author) Other; de Almeida, JMMM (Author) FCUP; Coelho, LCC (Author) FCUP

Conference proceedings International

Title: Journal of Physics: Conference Series

5th International Conference on Applications of Optics and Photonics, AOP 2022

17 July 2022 through 22 July 2022

Indexing

Scopus

Other information

Authenticus ID: P-00X-KMP

DOI: 10.1088/1742-6596/2407/1/012015

Abstract (EN): Bloch Surface Waves (BSW) consist of electromagnetic modes generated at the interface between a photonic crystal and an isotropic dielectric. This type of surface mode displays sharp resonances and high sensitivity to external refractive index variations, and thus appears to be an ideal candidate for usage in optical sensors. Nevertheless, design and optimization of photonic crystals is not a trivial task and constitutes an ongoing field of research. The sensitivity of BSW in both refractometric and adsorption sensing is calculated analytically using first-order perturbation theory for TE modes, allowing the understanding of how several physical parameters of the photonic crystal influence the sensitivity. Preliminary experimental results are presented, which aim to use the analytical calculations to allow for both refractometric and adsorption sensing in a single photonic crystal structure. © Published under licence by IOP Publishing Ltd.

Language: English

Type (Professor's evaluation): Scientific