Open AccessFano resonance and polarization transformation induced by interpolarization coupling of Bloch surface waves
Author(s) -
Junxue Chen,
Pei Wang,
Hai Ming,
Joseph R. Lakowicz,
Douguo Zhang
Publication year - 2019
Publication title -
physical review. b./physical review. b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.78
H-Index - 465
eISSN - 2469-9969
pISSN - 2469-9950
DOI - 10.1103/physrevb.99.115420
Subject(s) - physics , polarization (electrochemistry) , dielectric , fano resonance , grating , diffraction , optics , transverse plane , condensed matter physics , surface wave , transverse mode , coupling (piping) , electromagnetic radiation , resonance (particle physics) , atomic physics , materials science , optoelectronics , plasmon , laser , chemistry , structural engineering , metallurgy , engineering
In this work, the resonant coupling behaviors between the transverse-electric (TE) and transverse-magnetic (TM) Bloch surface waves (BSWs) on a dielectric multilayer have been theoretically studied. Due to the different penetration depths in the dielectric multilayer, the TM BSWs and TE BSWs can act as the radiative and dark electromagnetic modes, respectively. By using a rectangular grating on the dielectric multilayer, both Rabi splitting and Fano resonance phenomena based on the coupling of the two BSW modes were demonstrated, through tuning the period of the grating and the azimuthal angle of the incoming wave. Furthermore, by using the temporal coupled-mode theory, we show that the anti-Hermitian coupling between the two BSW modes contributes to the enhanced diffraction and the huge polarization transformation efficiency of incoming waves in the weak coupling regime.