Active tuning of directional scattering by combining magneto-optical effects and multipolar interferences
| Autor: | M.Q. Liu, Changying Zhao, Boxiang Wang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Nanostructure Forward scatter Scattering business.industry Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Optical switch Magnetic field 010309 optics 0103 physical sciences Broadband Dispersion (optics) Optoelectronics General Materials Science 0210 nano-technology business Degeneracy (mathematics) |
| Zdroj: | Nanoscale. 10(38) |
| ISSN: | 2040-3372 |
| Popis: | An efficient route is proposed to actively manipulate directional scattering based on magneto-optical (MO) effects and multipolar interferences with a coated MO cylinder. We demonstrate that the presence of an external magnetic field B contributes to breaking the degeneracy of multipoles and making them rotate. The rotated modes further interfere with each other, thus reshaping scattering profiles and introducing novel directional optical switching (OS) phenomena. As a result, we show that forward scattering (FS) and backward scattering (BS) can be flexibly altered by turning on or off the B for both s-polarization and p-polarization, and optical switching exhibits broadband performance as well. More specifically, the proposed nanostructure also operates robust and reliable functionalities when considering realistic MO materials with optical loss and dispersion; therefore, they are ideal candidates to develop reconfigurable, tunable and versatile optical devices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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