| Issue |
EPJ Web Conf.
Volume 335, 2025
EOS Annual Meeting (EOSAM 2025)
|
|
|---|---|---|
| Article Number | 08007 | |
| Number of page(s) | 2 | |
| Section | Topical Meeting - Optical Materials | |
| DOI | https://doi.org/10.1051/epjconf/202533508007 | |
| Published online | 22 September 2025 | |
https://doi.org/10.1051/epjconf/202533508007
From the visible to the near infrared: Revealing the optical response of J-aggregates thin films of cyanine dyes
1 Instituto de Óptica “Daza de Valdés” (IO), CSIC, 28006 Madrid, Spain
2 CINBIO, Universidade de Vigo, 36310 Vigo, Spain
3 Instituto de Ciencia de Materiales (ICMM), CSIC, 28049 Madrid, Spain
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 22 September 2025
Abstract
J-aggregates thin films of cyanine dyes are very attractive organic nanomaterials formed by highly ordered assembly of supramolecular organic structures. These films show unique spectroscopic properties, making them promising candidates for integration into advanced electronic and photonic devices. Their spectra show very narrow resonances, resulting in spectral regions with high refractive index, comparable to semiconductors, and negative permittivity, similar to metals. This study focuses on the characterization of the optical properties of cyanine J-aggregates thin films, including refractive index and permittivity, in a wide spectral range from visible to near infrared wavelengths. Our findings highlight the potential of these structures for the development of sustainable photonic devices.
© The Authors, published by EDP Sciences, 2025
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