Refractometric sensitivity of Bloch surface waves: perturbation theory calculation and experimental validation

• Type: Article in International Scientific Journal
• Date: 2023

Authors

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

Journal

Title: Optics Letters

Vol. 48

Final page: 727

ISSN: 0146-9592

Publisher: Optical Society of America

Indexing

Scopus - 727 Citations

Other information

Authenticus ID: P-00X-P9K

DOI: 10.1364/ol.481176

Abstract (EN): The sensitivity of one-dimensional Bloch surface wave (BSW) sensors to external refractive index variations using Kretschmann¿s configuration is calculated analytically by employing first-order perturbation theory for both TE and TM modes. This approach is then validated by comparison with both transfer matrix method simulations and experimental results for a chosen photonic crystal structure. Experimental sensitivities of (8.4±0.2)×102 and (8.4±0.4)×102 nm/RIU were obtained for the TE and TM BSW modes, corresponding to errors of 0.02% and 4%, respectively, when comparing with the perturbation theory approach. These results provide interesting insights into photonic crystal design for Bloch surface wave sensing by casting light into the important parameters related with sensor performance. © 2023 Optica Publishing Group.

Language: English

Type (Professor's evaluation): Scientific