Volume 133, Number 6, March 2021
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||12 May 2021|
High-quality Fano resonances and multispectral perfect absorption in mushroom-type dielectric metamaterials with a silver nanofilm
1 School of Electronic Science and Applied Physics, Hefei University of Technology - Hefei, Anhui 230009, China
2 School of Physics and Electronics, Hunan University - Changsha 410082, China
3 School of Physics and Electronics Science, Hunan University of Science and Technology - Xiangtan, 411201, China
Received: 21 January 2021
Accepted: 1 March 2021
Dielectric metamaterials with high refractive index have drawn intensive attention owing to their advantages of confinement and guiding of light in practical photonic devices. Here, we propose a hybrid nanostructure, consisting of mushroom-type dielectric nanoarrays and plasmonic nanofilms, towards the goal of achieving multispectral perfect absorption of light and high-quality Fano resonance. Our studies reveal that the proposed structure indeed possesses the expected properties of light harvest and Fano resonance, which is induced by the coupling between plasmonic and Mie-type resonant modes. Furthermore, the resonant field distributions inside the nanostructure and the effects of modifying the parameters of dielectric nanoarrays on resonant modes are systematically investigated. Our findings of nearly total absorption in silicon and high-quality sensing of the combined system will greatly benefit the applications of solar energy transition and sensors.
PACS: 78.67.Bf – Nanocrystals, nanoparticles, and nanoclusters / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
© 2021 EPLA
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.