Open AccessControlling the interaction between plasmon-induced transparency and guided mode resonance
Author(s) -
Xiaolei Zhao,
Cai Yuan,
Yeyu Zhu,
Xiangfeng Chen,
Lin Zhu
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.030043
Subject(s) - metamaterial , coupled mode theory , plasmon , optics , waveguide , surface plasmon resonance , guided mode resonance , electromagnetically induced transparency , excited state , coupling (piping) , surface plasmon polariton , resonance (particle physics) , excitation , mode coupling , surface plasmon , wavelength , materials science , optoelectronics , physics , refractive index , diffraction grating , nanotechnology , atomic physics , nanoparticle , quantum mechanics , metallurgy
A hybrid metamaterial-waveguide (HMW) system, consisting of a plasmon-induced transparency (PIT) metamaterial layer deposited on top of a slab waveguide, is investigated at mid-infrared wavelengths. The proposed hybrid system supports three quasi-guided modes. Two of them are excited through the conventional pathway, i.e. directly excited from the free-space waves via the diffractive coupling, while the theoretical analysis and numerical simulation both demonstrate that the third one undergoes a completely different excitation pathway, i.e. induced by the dark plasmon mode via near field coupling. The interactions between the three quasi-guided modes and the PIT effect further lead to the interesting multi-spectral transmission characteristics that cannot be realized in traditional HMW systems. This is the first report, to our best knowledge, describing this unconventional excitation mechanism of the quasi-guided mode as well as the interaction between the quasi-guided waveguide mode and PIT effect.