Polarization rotation of localized modes in magneto-photonic Fibonacci structures containing nematic layers

ABSTRACT

In this study, we investigate the spectral characteristics of the oblique incident light transmitted by a multilayered structure composed of a quasi-periodic Fibonaccian sequence of nematic and magnetic layers. Using the Berreman 4 × 4 matrix formalism, we numerically obtain the transmission spectrum and the polarization rotation angle of the system as a function of the incidence angle. Our results reveal that the mismatch between the wavelengths of the localized transmitted mode within the band gap and the mode with pronounced polarization rotation angle is reduced when one departs from the normal incidence condition. Further, we report the dependence of the band gap width and the spectral characteristics of the transmitted mode as a function of the incidence angle. The relevance of the present finding to the development of new magneto-optical devices is discussed.

KEYWORDS:

• Faraday rotation
• liquid crystalline photonic structure
• magneto-optical device
• quasi-crystals

PACS numbers:

• 42.70.Df
• 42.70.Qs
• 78.20.Ls

Funding

This work was partially supported by the Brazilian research agencies CNPq, CAPES and FINEP, INCT-Fluidos Complexos, as well as by the Alagoas state research agency FAPEAL.