One-dimensional photonic crystal for surface mode polarization control

0564254 - FZÚ 2023 RIV DE eng J - Journal Article
Mogni, E. - Pellegrini, G. - Gil-Rostra, J. - Yubero, F. - Simone, G. - Fossati, S. - Dostálek, Jakub - Martínez Vázquez, R. - Osellame, R. - Celebrano, M. - Finazzi, M. - Biagioni, P.
One-dimensional photonic crystal for surface mode polarization control.
Advanced Optical Materials. Roč. 10, č. 21 (2022), č. článku 2200759. ISSN 2195-1071. E-ISSN 2195-1071
R&D Projects: GA ČR(CZ) GC22-30456J
Institutional support: RVO:68378271
Keywords : circular dichroism spectroscopy * linear dichroism spectroscopy * photonic crystals * surface-enhanced spectroscopy * surface waves
OECD category: Biophysics
Impact factor: 9, year: 2022
Method of publishing: Open access

Bloch surface waves sustained by truncated 1D photonic crystals (1DPCs) are well known tools for surface-enhanced spectroscopy. They provide strongly confined fields with uniform distribution over a large surface area, a characteristic exploited in standard refractometric sensing. However, their application to polarization-sensitive investigations is not straightforward because the transverse electric (TE) and magnetic (TM) surface modes possess distinct dispersion relations, therefore their relative phase is not conserved along propagation and the polarization state of any wave obtained by combining these modes is ill-defined. In this work, a novel design of a 1DPC is realized in which the TE and TM modes exhibit the same phase velocity over a broadband spectral range and thus their dispersion relations overlap. The capability to simultaneously excite TE and TM modes with a well-defined phase relation allows the generation of surface waves with a controlled polarization state.
Permanent Link: https://hdl.handle.net/11104/0335959