Numerical analysis of tiny-focal-spot generation by focusing linearly, circularly, and radially polarized beams through a micro/nanoparticle
| Autor: | Frank Wyrowski, Christian Hellmann, Zongzhao Wang, Shih Te Hung, Rui Shi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Electromagnetic field
3D optical data storage Materials science Cuboid business.industry Nanoparticle 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Lens (optics) Wavelength Optics law 0103 physical sciences Photolithography 0210 nano-technology business |
| Zdroj: | Optics Express, 29(2) |
| ISSN: | 1094-4087 |
| Popis: | Obtaining a tiny focal spot is desired for super resolution. We do a vectorial numerical analysis of the linearly, circularly, and radidally polarized electromagnetic fields being focused through a dielectric micro/nanoparticle of size comparable to the wavelength. We find tiny focal spots (up to ∼ 0.05 λ 2 ) can be obtained behind micro/nanoparticles of various shapes, e.g. spherical, disk-shaped, and cuboid micro/nanoparticles. Furthermore, we also investigate the influence of the misalignment of a real lens system on the tiny focal spots. We find that tiny focal spots can still be generated even though they are distorted due to the misalignment. |
| Databáze: | OpenAIRE |
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