Generation of unconventional Fano-comb resonances in multilayered core–shell nanoparticles
| Autor: | Pei Ding, Yin Xiao Du, Ming Lei, Fang Jie Luo, Li Shao, Fa Cheng Zhong, Zhuo Chen, Lei Ming Chen, Yan Li |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Scattering Mechanical Engineering Mie scattering Physics::Optics Nanoparticle Bioengineering 02 engineering and technology General Chemistry Dielectric Fano plane 010402 general chemistry 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Molecular physics 0104 chemical sciences Mechanics of Materials Physics::Atomic and Molecular Clusters General Materials Science Electrical and Electronic Engineering 0210 nano-technology Multipole expansion Plasmon |
| Zdroj: | Nanotechnology. 30:375401 |
| ISSN: | 1361-6528 0957-4484 |
| DOI: | 10.1088/1361-6528/ab2996 |
| Popis: | We theoretically propose a design of core-shell nanoparticles consisting of a dielectric core coated by several alternating plasmonic and dielectric shell layers for the generation of comb-like scattering resonances. We demonstrate that the obtained scattering resonances are independent of the polarization, observation angle and background medium, since they originate from the unconventional Fano interference between Mie modes with the same multipole moment inside each plasmonic shell layer. Furthermore, we also demonstrate that controlling either the core or the shell parameters can precisely tune the spectral positions of the comb-like resonances. At last, we show that the comb-like resonances can be well maintained even for the non-perfect spherical core-shell nanoparticles. All these features make the proposed multilayered core-shell nanoparticles attractive candidates for multichannel and ultrasensitive optical tags. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|