Highly Confined and Switchable Mid-Infrared Surface Phonon Polariton Resonances of Planar Circular Cavities with a Phase Change Material
| Autor: | Peining Li, Thomas Taubner, Martin Lewin, Tao Wang, Ann-Katrin U. Michel, Matthias Wuttig, Hisashi Sumikura, Andreas Heßler, Lena Jung, Dmitry N. Chigrin |
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| Rok vydání: | 2019 |
| Předmět: |
Surface (mathematics)
Materials science business.industry Mechanical Engineering Physics::Optics Bioengineering Astrophysics::Cosmology and Extragalactic Astrophysics 02 engineering and technology General Chemistry Surface phonon 021001 nanoscience & nanotechnology Condensed Matter Physics Molecular physics Nanomaterials Planar Excited state Polariton Polar General Materials Science Photonics 0210 nano-technology business Astrophysics::Galaxy Astrophysics |
| Zdroj: | Nano Letters. 19:2549-2554 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | Mid-infrared (MIR) photonics demands highly confined optical fields to obtain efficient interaction between long-wavelength light and nanomaterials. Surface polaritons excited on polar semiconductor and metallic material interfaces exhibit near-fields localized on subwavelength scales. However, realizing a stronger field concentration in a cavity with a high quality ( Q) factor and a small mode volume is still challenging in the MIR region. This study reports MIR field concentration of surface phonon polaritons (SPhPs) using planar circular cavities with a high Q factor of ∼150. The cavities are fabricated on a thin film of the phase change material Ge |
| Databáze: | OpenAIRE |
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