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

Pages: 727-730

ISSN: 0146-9592

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 1 Citation

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 com- parison with both transfer matrix method simulations and experimental results for a chosen photonic crystal structure. Experimental sensitivities of (8.4 +/- 0.2)x102 and (8.4 +/- 0.4)x102 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 the- ory approach. These results provide interesting insights into photonic crystal design for Bloch surface wave sensing by casting light into the important parameters related with sen- sor performance.(c) 2023 Optica Publishing Group

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4